more than you expect Lighting LTspice Transformer Library LTspice IV definition: LTspice IV is a free, high-performance, SPICE simulator software by Linear Technology which is widely used in the industry. Expanse of Library: “Usable transformer SPICE models for switching power supplies have always been an industry challenge. The Wurth Electronics Midcom LTspice Transformer Library provides transformer models that give realistic results while simulating very quickly.” – Dean Huumala, Product Marketing Manager at Wurth Electronics Midcom The library consists of three different LTspice models for over 200 of our power transformers, including designs for lighting and metering applications, PoE and PoE+, isolated DC/DC converters, flyback and offline transformers. All of these parts are currently featured on our website at www.we-online.com/midcom. Model Options: The Basic Library n Basic model type n Symbols are named with “_B” at the end of the part number n n The Basic library netlist is similar to other LTspice transformer models seen in the industry today Ability to be imported and converted into other SPICE programs The Standard Library n Offers two model types: the Linear and Saturation models. Linear is labeled “_Linear” at the end of the part number and saturation is labeled “_Saturation” n The models use the same symbol, but different netlists. n Both models simulate very quickly, are very accurate models, and include the same parasitics. n 2 The Saturation model includes saturation effects as well, making it more accurate, but runs slightly slower than the Linear model, which simulates about 25% faster than the Saturation model. www.we-online.com TO REQUEST A CUSTOM MODEL: If you would like to request a custom transformer model, contact your local Wurth Electronics Midcom representative or send a request to: [email protected]. Content LTspice Transformer Library................................................................................................................................................................2 Lighting Reference Designs Table................................................................................................................................................. 4-7 Eagle Library................................................................................................................................................................................................8 Speedy Design Service............................................................................................................................................................................9 Introduction................................................................................................................................................................................................10 LED Lighting and EMI.............................................................................................................................................................................11 Safety Functional, Basic and Reinforced Insulation........................................................12 Definitions........................................................................................................12 Standards Applicable to LED Lighting (UL8750 • IEC60950-1 • UL1310 • EN61347-2-13).........................................13 Switch Mode Power Supply Topologies Compared............... 14-16 Topology Selection Flowchart................................................................17 Lighting Reference Designs.............................................................. 18-51 Dual Coil: Common Mode Choke..........................................................52 WE-TFC: Common Mode Choke............................................................53 3 Lighting Reference Designs Table IC House Infineon Technologies 750845240 Infineon Technologies 750311798 750815141 744862120 Infineon Technologies 750845151 750341383 750311650 Reference Design BCR450, TDA4863 Flyback Transformer ICL8001G-Bulb02 Flyback Transformer Flyback Transformer Common Mode Choke ICL8002G Flyback Transformer Power Inductor Common Mode Choke Power 40W AC Input Voltage 90-270RMS Dimming Type PWM Application Street and Indoor Lighting 9W 90-265RMS Phase-Cut Retrofit Bulb 19 11W 195-265RMS Phase-Cut Retrofit Lamp 20 Linear Technology LT3798 5-100W 90-265RMS Non-dimmable Retrofit and Indoor Lighting 21 4-100W 90-265RMS TRIAC Architectural, High Bay, Street Lighting 22 7508110210 750813002 750811330 750813144 750813134 750811291 750813390 750811290 7508111417 750811351 750811248 750312872 Linear Technology 7508110210 750813002 750811330 750813144 750813134 750811291 750813390 750811290 7508111417 750811351 4 www.we-online.com Page 18 Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer LT3799/LT3799-1 Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer Flyback Transformer IC House Reference Design Power AC Input Voltage Dimming Type NXP Semiconductors SSL210x, UM10341 12W 85-276RMS 19/22W 750340505 744776268 744776233 74477120 Page TRIAC and Transistor Application Retrofit Incandescent to 100W 85-276RMS TRIAC and Transistor Retrofit Incandescent to 100W 23 9W 90-135RMS TRIAC Retrofit PAR30 24 14W 90-135RMS TRIAC Retrofit PAR38 25 10W 185-265RMS Phase-Cut Retrofit Lamp, LED Strings, LED Modules 26 23W 120RMS or 230RMS PWM Dimming Retrofit LED Lamps, LED Driver Modules 27 150W 70 - 305RMS 0V-10V Dimming Street, Industrial, Commercial, High Bay, Low Bay 28 35W 100-277RMS Non-dimmable Fluorescent Lamp Ballasts 29 35W 100-277RMS 0-10V Dimming Tube Lamps, Fluorescent Lamps 30 28W 100-277RMS 0-10V Dimming General Lighting, Fluorescent Lamps 31 23 Flyback Transformer Power Choke Power Choke Power Choke NXP Semiconductors SSL210x, UM10386 750340505 744776268 744776233 74477120 NXP Semiconductors 750311819 750311524 NXP Semiconductors 750311525 744821120 Flyback Transformer Input Filter Inductor Input Filter Inductor Output Filter Inductor SSL2101 (PAR30) Buck Inductor with Aux for US Buck Inductor with Aux for Europe SSL2101 (PAR38) Flyback Transformer Common Mode Choke NXP Semiconductors SSL2101T 750312870 Flyback Transformer 760874040 Flyback Transformer 7447452472 THT Inductor NXP Semiconductors SSL2109 750312626 Power Inductor NXP Semiconductors SSL4101 750312184 750312185 750312186 750312188 750341026 NXP Semiconductors 760800001 750312352 750312407 750311081 Common Mode Choke Common Mode Choke Power Inductor PFC Transformer Flyback Transformer UBA2015P PFC Transformer Power Inductor Power Inductor Gate Drive Transformer NXP Semiconductors UBA2015AT 760801080 750312407 760800001 7448640405 750311081 NXP Semiconductors PFC Transformer Power Inductor PFC Transformer Current Compensated Choke Gate Drive Transformer UBA2016AT 750311082 Resonant Choke 750311083 PFC Inductor 750311081 Gate Drive Transformer 5 Lighting Reference Designs Table (continued) IC House Reference Design Power AC Input Voltage 90-135RMS or 180265RMS Dimming Type Application ON Semiconductor AND8463/D 11W Page TRIAC and ELV Retrofit PAR30 32 15W 90-135RMS TRIAC Retrofit Lamps, Commercial, Residential 33 15W 180-265RMS TRIAC Retrofit Lamps, Commercial, Residential 34 17W 90-305RMS Non-dimmable Retrofit Lamps, Commercial, Residential 35 75W 90-265RMS Analog, PWM, and Bi-level Street Lighting, Low Bay Lighting, Architectural 36 37 750311620 Flyback Transformer 750311431 Input Filter Inductor 750311826 Input Filter Inductor ON Semiconductor 750311475 750311215 750311431 7446620027 ON Semiconductor 750311475 750311215 750311505 7446620027 ON Semiconductor NCL30000LED1GEVB/D Flyback Transformer for High Efficiency Flyback Transformer for Compact Size Input Filter Inductor Common Mode Choke NCL30000LED2GEVB/D Flyback Transformer for High Efficiency Flyback Transformer for Compact Size Input Filter Inductor Common Mode Choke NCL30000LED3GEVB 750311475 Flyback Transformer for High Efficiency 750311215 Flyback Transformer for Compact Size 7446620027 Common Mode Choke ON Semiconductor NCL30001, AND8427/D 750311267 Flyback Transformer for 50V output 750311269 Flyback Transformer for 28V output ON Semiconductor NCL30002 30W 90-265RMS TRIAC LED Bulbs, Downlights, PFC LED Drivers, Fluorescent Tube Replacements 8W 90-265RMS Analog Control Under-cabinet Lights, Outdoor Porch Lights, Residential Luminaire 38 10W 90-265RMS Step or Analog/Digital LED Bulbs, Power Supplies, Light Engines 39 10W 90-265RMS Step or Analog/Digital LED Bulbs, Power Supplies, Light Engines 40 750313017 Power Inductor 750313062 Power Inductor 7447462471 Power Inductor ON Semiconductor NCP1014 750811042 Flyback Transformer ON Semiconductor NCL30080/NCL30081 750313306 Flyback Transformer 7447462152 Radial Leaded Wire Wound Inductor ON Semiconductor 750313435 750313436 7447462221 7447462152 6 www.we-online.com NCL30082/NCL30083 Flyback Transformer Power Inductor Power Inductor Power Inductor IC House Reference Design Power AC Input Voltage Dimming Type Page TRIAC Application Retrofit Bulb, Downlights, LED Lamps Texas Instruments LM3445, AN-2034 8W 90-135RMS 6-15W 180-265RMS TRIAC Retrofit Bulb, Downlights, LED Lamps 42 8W 90-265RMS Phase dimmable Industrial, Commercial, Residential 43 17W 90-135RMS PWM Indoor and Outdoor Area Lights, Bay Lights, Downlighting 44 750813550 Flyback Transformer Texas Instruments LM5021 750311959 Offline Transformer 30W 90-135RMS PWM LED Strings 45 Texas Instruments 6W 100-130RMS TRIAC Household Light Bulb Replacement 46 6W 185-265RMS TRIAC Household Light Bulb Replacement 47 41 750311553 Flyback Transformer for US Texas Instruments LM3445, AN-2069 750815040 Offline Transformer Texas Instruments LM3448 750813046 Offline Transformer 750813045 Offline Transformer Texas Instruments 750310787 744746221 7447462152 750310784 Texas Instruments LM3450 TPS92010EVM-592 Offline Transformer Radial Leaded Wire Wound Inductor Radial Leaded Wire Wound Inductor Common Mode Choke TPS92010EVM-631 750310787 Flyback Transformer for US 750310334 Flyback Transformer for Europe 750310784 Common Mode Choke for US and Europe Texas Instruments TPS92070 13W 180-240RMS TRIAC Lamp Bulb Replacement, LED Luminaires, Downlights, Wall Washers 48 7508110410 750082157 768772102 750310784 Texas Instruments 750811146 Texas Instruments Texas Instruments 750811148 Offline Transformer Analog Modem Transformer Power Inductor Common Mode Choke TPS92210-PMP6001 Flyback Transformer TPS92210-PMP6002 TPS92210-PMP6003 Flyback Transformer for US 13W 90-265RMS Non-dimmable Light Bulb Replacement 49 11W 11W 90-135RMS 180-265RMS TRIAC TRIAC Light Bulb Replacement Light Bulb Replacement 50 50 8W 90-135RMS Non-dimmable LED Lamps 51 750311650 Common Mode Choke for US and Europe Texas Instruments TPS92310 750341086 Flyback Transformer for US 750341087 Flyback Transformer for Europe 7 Eagle Library Wurth Electronics Midcom releases new EAGLE library V1.0. Now EAGLE users can concentrate on easier and earlier board design by using our component library, which offers pre-drawn pad layouts and pinouts for preferred, standard, and non-standard package styles. Library includes: n Preferred, standard, and non-standard package styles n Links to datasheets in the device descriptions n NEW! T8 package styles n NEW! Planar package styles n NEW! SMD offline package styles Component schematics show windings with specific and recommended pinouts available. Accurate pad layouts with redundant pin labeling for easier placement. The EAGLE library is available through the CadSoft EAGLE site or www.we-online.com/toolbox 8 www.we-online.com Speedy Design Service for Customized Power & Telecom Transformers World’s fastest sample service for customized transformers 1 Complete Speedy Design Form www.we-online.com/speedy 2 more than you expect Choose your designated service option Speedy Design Service Order Form Please complete and e-mail to [email protected] or fax to Wurth Electronics Midcom Inc. +1 605 886 4486. Only include the specifications you require. Company Information Selected Service Time Ship next day* Ship in 3 days* Price $1,200 $900 Company Phone Department E-mail Name Payment Type Service Ordered ❏ ship next day City / State ❏ ship 3 days Postal Code Country Application If product safety is an issue, please contact us immediately for technical consultation. Our products are not designed for aviation, medical, automotive or life supporting devices. Such applications require our written approval prior to use. IC Manufacturer Target Price Estimated Annual Usage IC Number/Name Start of Production Application/Project Name *Shipped with FedEx Priority Specification Complete only those specifications of interest and number in order of priority. Package Style: ❏ EP5 ❏ EP7 ❏ EP10 ❏ EP13 ❏ EPX7 ❏ EPX9 ❏ ER9.5 ❏ ER11.5 ❏ ER14.5 ❏ EFD15 ❏ EFD20 ❏ EFD25 ❏ EF12.6 ❏ EE13 ❏ EE16 ❏ EF16 ❏ EF20 ❏ EF25 ❏ ER28 General Specifications 3 Send to Wurth Electronics Midcom Fax ❏ Purchase Order (#__________________________) ❏ Credit Card (Visa, MasterCard, American Express) Street Value Priority * Power Parts Primary Inductance (µH) Topology Current in Primary (A) Total Output Power (W) Turns Ratio Input Voltage Range (V) Leakage Inductance (µH) Operating Frequency (kHz) Value Priority * Max. & Min. Duty Cycle Telecom Parts Value Priority * Frequency Response (dB) VAUX (V) indicate PRI or SEC IAUX (A) Return Loss (dB) VSEC1 with VDIODE (V) Total Harmonic Distortion (dB) ISEC1 (A) Longitudinal Balance (dB) VSEC2 with VDIODE (V) Line Impedance (Ω) ISEC2 (A) Load Impedance (Ω) Email: [email protected] or Contact: your local Wurth Electronics Midcom salesperson 4 * Priority: Please prioritize the most important specifications with numbers (e.g. 1, 2, 3) Temperature Range: Note: Wurth Electronics Midcom Inc. will design to meet the specifications as closely as possible with emphasis given to those parameters with priority. Samples will ship with necessary deviations reported along with the test data. Agency Requirements Regulatory Agencies: ❏ IEC61558 Insulation Requirements: ❏ Functional ❏ Basic ❏ Supplementary ❏ Reinforced Dielectric Withstand Voltage ❏ IEC60950 ❏ Functional ❏ Basic ❏ Supplementary ❏ Reinforced ❏ UL1310 ❏ Other Working Voltage This is what you receive: Specification Sheet, Test Data, and 5 Customized Pieces What applications are supported? • Any applications that fit package styles • Switch Mode Power: -Flyback -Forward -Push-Pull - Coupled Inductors • Telecom Applications: -xDSL - POTS Splitter Inductors 9 Introduction Lighting an LED used to be as simple as a resistor off a power rail for the proper drive current. Things are just not that simple anymore. We enter the age of “green”, global warming, and an awareness of our environment. LED lighting consumes half as much power as the “fading green” CCFL, and only 10% as much power as incandescent light bulbs. The US Department of Energy (DOE) has taken notice. With lighting using almost 25% of all electrical energy in the country, the DOE has developed an energy goal to reduce lighting consumption by 50% by the year 2025; thereby, saving more than $280 billion over the next 20 years. High efficiency of LEDs is only the beginning of the benefits. LED lighting truly is: ■ Green • No mercury gas • More robust • Long-life for less landfill waste ■ Cost effective •Efficient • Longer life span ■ “Wait a minute! I understand the high efficiency and the long life of LED lighting, but it’s healthy too?” LED lighting does not contain mercury, like CCFL, which we know is harmful to both our health and the environment. LED lighting also has lower UV and electromagnetic radiation than other lighting types. Power (W) Lamp Price (Real) Natural Life (H) Replace (Times/Y) Consume (KW.h/Y) 10 www.we-online.com The design centers and laboratories of Wurth Electronics Midcom are aware of these market forces, and we've designed and manufactured magnetics products for this industry. For DC to DC type of applications, we have developed both catalog and custom storage inductors for switching buck regulators. Typically the DC to DC applications are less than 15W, very small, efficient, and inexpensive. These are limited to applications which are not isolated, and where the output voltage is less than the input voltage. Our extensive lines of WE-TPC and WE-PD inductors are suitable for almost any buck lighting application. For DC to DC applications where isolation is required, flyback topologies with our transformers are usually used. DC to DC Applications •Automotive •Bicycles •Flashlights • Sporting gear • Solar fixtures Health benefits • No mercury • No UV radiation • Low electromagnetic radiation ITEM We see market trends which glimmer of LED lighting in the not-sodistant future. In its new report “LEDs and Laser Diodes: Solid State Lighting Applications, Technologies, and Market Opportunities”, NextGen Research forecasts a compound 22% AGR through 2013 with revenues reaching $33B by 2012. The Report Buyer, “U.S. Solid-State (LED) Lighting Market Trends, Opportunities and R&D Activities 2009 – 2014” predictions are even higher, at 30.9%. The future certainly looks bright for LED lighting. Incandescent Lamp Fluorescent Lamp LED Lamp 400 80 40 1.00 4.00 20.00 <1000 <4000 >50000 4.38 1.095 0.0876 1752 350.4 175.2 AC to DC applications have safety-critical agency requirements dictating the design. We have developed design and manufacturing capabilities on standard packages to produce quick turnaround of custom transformers. See our Speedy Design Service for a small, inexpensive, custom solution. AC to DC Applications • Lamps/bulbs • • Light fixtures • Street lighting Airport lighting • Bay lighting • Traffic lighting Field Application Engineers (FAEs) and Design Engineers at Wurth Electronics Midcom understand the challenges facing the LED power supply designer. We understand that beyond thermal management and efficiency, one must care for EMI, safety isolation and power factor. Let us help to select the proper common mode choke. We suggest our WETFC or our new, Dual Coil series - both developed specifically for lighting EMC. We'll send you custom transformers from our lab with our next-day Speedy Service. n LED Lighting and EMI The lighting industry has experienced a rapid shift toward more energyefficient products due to the marketing of “Green Products”, which focus on lowering the carbon footprint. The use of Light Emitting Diodes (LEDs) for replacement of standard incandescent light bulbs is more popular in residential and consumer lighting products. This transition is due to the success of LED lighting for traffic lighting, automotive lighting, and lower wattage industrial lighting. Any new innovation experiences obstacles. In LED lighting, one problem is the issue of Electromagnetic Interference (EMI), or unwanted noise signals. There are regulations and standards that govern the EMI levels for equipment classifications. Lighting products fall into a specific set of these classifications. This means that any lighting products using LEDs as replacement products for the standard incandescent light bulbs will need to meet EMI regulations. LED lighting must be more aggressive to meet EMI, because driver circuits for the LED products operate at higher frequencies than the older incandescent bulbs (which operate directly off of the 50/60Hz line voltage). These higher switching frequencies are the culprit creating the EMI problems. For residential lighting, the unwanted interference occurs as either conducted or radiated signals. The conducted emission frequency ranges from 150kHz up to 30MHz, and the radiated range is for frequencies of greater than 30MHz. (See Figure 1). Even when the circuit designs are constructed and formatted to reduce EMI problems, there can be frequencies in those ranges that will not meet the minimum FCC regulatory standard level. When this occurs, there are different filtering devices or networks used to meet the EMI regulations. VDE - Conducted FCC - Conducted The other failure is conducted noise interference. When conducted emission failures are detected, the problem is from differential mode (symmetrical) interference or common mode (asymmetrical) interference. As seen in Figure 2, differential interference occurs due to an unbalance of the current flow between the line (L1) and neutral (N) nodes. Differential noise appears from the out-phase voltages at these nodes from any unbalance of the signals. The voltage creates a current in these cables. This out of phase current is the differential current. When the signals are not equal and opposite, differential interference occurs. The usual solution for correcting differential mode interference is to add an inductive component on each of the wires, one on the neutral and an equal value on the line. This employed solution will create impedances that will lower the unwanted signal. The differential mode current flowing in opposite directions through the added inductors will induce magnetic fields in opposite directions. This generates impedances, which will help to suppress the unwanted signal noise and better meet the regulatory maximum values. The other conducted interference type is common mode interference. This type of interference occurs from in-phase current flow between line (L1) and neutral (N) with respect to earth ground. All common mode interference develops when each current in the cable flows to earth ground via parasitic capacitance. The solution to lower this unwanted interference is to use a common mode inductor. This is a component that has two windings on a common core. By connecting the component properly in the circuit, the common mode current will flow in the same direction through each inductor winding; thereby, creating equal and in-phase magnetic fields. This results in the part having high impedance to the common mode signal. Common Mode and Differential Mode Interference MIL-STD - Conducted VDE - Radiated FCC - Radiated MIL-STD - Radiated 10 Hz 100 1 kHz 10 100 1 MHz 10 100 1 GHz 10 100 Frequency Figure 1 If there are issues with radiated noise interference, the solutions shield certain components, or the entire circuit. Shielding the device blocks the unwanted signals, which are usually over 30MHz. The shielding is usually performed from copper shields to divert, or ferrite shields to absorb, the unwanted signals. Figure 2 ! ! Solutions using both common mode inductors with differential mode inductors are often used for reduction of the unwanted noise, while not losing much operating efficiency. Nevertheless, more circuit board space is needed, and cost increases in added components, but these methods need to be used to meet the FCC regulation levels. 11 Safety Functional, Basic, and Reinforced Insulation Definitions The affect of insulation requirements is significant enough to change the form factor, performance, cost, and of course, reliability of the transformer. In general terms, functional insulation is the easiest insulation to achieve. It allows for magnet wire to be in contact with other magnet wire and has no creepage or clearance requirements. The insulation strength is tested by a simple dielectric (hipot) test. Both basic and reinforced insulation are common to parts subject to offline voltages (85-265VAC). The primary difference between these two types of insulation and functional insulation is that basic and reinforced require physical separation between windings, solder joints, and cores. These distances are known as creepage and clearance. There are a several methods to achieve distance requirements; multi-section bobbins, encapsulation, margin tape, and extruded insulated wire are the most common. You can imagine certain drawbacks to the special insulation: increased size, reduced coupling, lower efficiency, decreased manufacturing capacity, and limited pin configuration options. The distance requirements and lead isolation are set by specific standards. Reinforced insulation is typically twice that of basic insulation. In some cases, special materials can be used to reduce the distance requirements. In other cases, lead-in routing rules can cause significant manual production processes, especially when pin configuration is fixed. Size Pinout flexibility Efficiency Coupling Manufacturing capacity/leadtime Cost Safety Dielectric withstand 12 www.we-online.com Functional Basic/ Reinforced + + + + + + - + + Basic Insulation Insulation applies to hazardous live parts to provide basic protection against electric shock. Double Insulation Insulation comprising both basic insulation and supplementary insulation. Functional Insulation Insulation that is necessary only for the functioning of the equipment Single insulation system that provides a Reinforced degree of protection against electric shock Insulation equivalent to double insulation Creepage Distance Shortest distance through air along the surface of an insulation material between two conductive parts Clearance Distance Shortest distance in air between two conductive parts Working Voltage Highest voltage to which the insulation or the component under consideration is, or can be, subjected when the equipment is operating under conditions of normal use Standards Applicable to LED Lighting ■ UL1310 ■ UL8750 • Class 2 Power Units - Specifies the safety requirements for Class 2 power supplies • LED Components - Specifies the safety requirements for LED light sources and the components i. ii. Dielectric requirements i. ii. Dielectric requirements 1. 1000VAC plus twice the maximum rated voltage between: Spacing requirement of 0.8mm Spacing requirement same as UL8750 1. 1000VAC plus twice the AC (RMS) voltage between: a. The primary circuit and accessible dead metal parts; and a. The primary circuit and accessible dead parts; and b. The primary and secondary circuit or circuits b. The primary and secondary circuit or circuits 2. 500V between a secondary circuit operating at 70V peak or less and accessible dead metal parts 2. 1000VAC plus two times the sum of secondary voltages between secondary windings for units described in 28.3 or 30.2.3 3. 500VAC between a secondary circuit and dead metal parts ■ EN61347-2-13 ■ IEC60950-1 • Information Technology Equipment – Specifies the safety requirements for electronic hardware i. Spacing requirements of 8mm for reinforced 400V ii. Dielectric requirement: 1500- 4500VAC • Lamp Control Gear – Specifies safety requirement for DC or AC supplied electronic control gear for LED modules i. Spacing requirements of 3-6mm ii. Dielectric requirement 1. Basic insulation: 2U+1000V 2. Supplementary insulation: 2U+1750V 3. Reinforced insulation: 4U+2750V 13 Switch Mode Power Supply Topologies Compared The ubiquitous linear power supply of old has been on a steady decline for years, ever since the advent of Switch Mode Power Supplies (SMPS). The clear advantage to SMPS over linear supplies has been size and efficiency, and as the world-wide energy crises looms on the international, commercial and political scene, we have seen the trend to SMPS only accelerate. As a new technology, the high component count of SMPS made the technology more expensive than linear. But with the birth of the electronic age, component costs have dropped so low that the high raw material content of copper and iron in the linear transformer has made the SMPS technology more cost effective. Even with the disadvantages of being more complex and requiring more care to control EMI, the advantages of switch mode power supplies far outweigh linear power supplies in all but a few niche applications. Power Supply Linear SMPS Size Large and Heavy Small and Light Efficiency 30-40% 70-95% Complexity Simple Complex EMI Low Noise Filtering Required Cost High (Due to Material) Low Switching power supplies are made up of a number of different stages. If the input is an AC input, then the input stage needs to include both the input filter and a rectifier to convert to a DC input. DC to DC converters do not need the rectifier. The inverter stage turns around and immediately converts the now DC input back into an AC input by switching the DC input voltage on and off at a much higher frequency than the original AC input. The frequency of operation is often chosen to be in the 20kHz to 150kHz range, which is high enough to be outside the audible range and low enough to keep it outside of the FCC requirements for conducted EMI. After the inverter stage, the output stage rectifies and filters the output. If an isolated design is required, a transformer is placed between the rectifier and output stage. This transformer can be much smaller, lighter and cheaper than the linear power supply transformer, due to the higher switching frequency. When designing a power supply, typically the design criteria favors a switchmode power supply over a linear power supply. When it comes to deciding which SMPS topology to use, the decision can often be much more difficult. Selecting the wrong topology can result in a design project that does not meet your cost targets, efficiency goals or a host of other requirements that you might have. Below we discuss some of the more common topologies and their features. Buck Buck converters are one of the simplest, cheapest and most common topologies. While this topology is not suited for applications where isolation is required, it is ideal as a DC to DC converter used to stepdown voltages. Not only can you achieve high efficiency levels, but also high power levels using a buck converter, especially with poly-phase topologies. The down side to buck converters is that the input current is always discontinuous, resulting in higher EMI. However, EMI issues can be addressed with filter components such as chip beads, common mode chokes and filter chokes. The buck topology only requires a single inductor for single-phase applications, and catalog inductors for a wide range of applications are available. In addition, custom inductors can be developed for those special inductance versus current values that are required, as well as for applications requiring extra windings for sensing or supplying power to the controller. Boost The boost topology, like the buck topology, is non-isolating. Unlike the buck topology, the boost steps up the voltage rather than stepping it down. Because the boost topology draws current in a continuous, even manner when operating in continuous conduction mode, it is an ideal choice for Power Factor Correction circuits. Like the buck topology, there are many catalog choices for the inductor used in boost circuits, and where there is a special need, custom inductors are available as well. Between the output stage and the inverter stage is a controller which monitors the output and adjusts the switching action to keep the output at the desired level. Mains Input Rectifier and Input Filter Inverter Switch Controller 14 www.we-online.com Output Transformer Output Rectifier and Filter DC Output Buck-Boost Push-Pull The buck-boost topology can either step the voltage up or down. This topology is particularly useful in battery powered applications, where the input voltage varies over time but has the disadvantage of inverting the output voltage. Another disadvantage to the buck-boost topology is that the switch does not have a ground, which complicates the drive circuit. Using only a single inductor like the buck and the boost topologies, the buck-boost inductor and EMI components are readily available. The push-pull topology is essentially a forward converter with two primary windings used to create a dual drive winding. This utilizes the core of the transformer much more efficiently than the flyback or the forward converters. On the other hand, only half the copper is being used at a time, thereby increasing the copper losses significantly in a similar sized transformer. For similar power levels, the push-pull converter will have smaller filters compared to the forward converter. However the advantage that push-pull converters have over flyback and forward converters is that they can be scaled up to higher powers. Switching control can be difficult with push-pull converters, because care has to be taken not to turn on both switches at the same time. Doing so will cause the equal and opposite flux in the transformer, resulting in a low impedance and a very large shoot-through current through the switch, potentially destroying it. The other disadvantage to the push-pull topology is that the switch stresses are very high (2∙VIN), which makes the topology undesirable for 250VAC and PFC applications. SEPIC/Ćuk The SEPIC and Ćuk topologies both use capacitors for energy storage in addition to two inductors. The two inductors can be either separate inductors or a single component in the form of a coupled inductor. Both topologies are similar to the buck-boost topology in that they can step-up or step-down the input voltage, making them ideal for battery applications. The SEPIC has the additional advantage over both the Ćuk and the buck-boost in that its output is non-inverting. An advantage to the SEPIC/Ćuk topologies is that the capacitor can offer some limited isolation. Catalog coupled inductors are available for the SEPIC and Ćuk topologies, and custom inductors are readily available for special needs. Flyback The flyback topology is essentially the buck-boost topology that is isolated by using a transformer as the storage inductor. The transformer not only provides isolation, but by varying the turns ratio, the output voltage can be adjusted. Since a transformer is used, multiple outputs are possible. The flyback is the simplest and most common of the isolated topologies for low-power applications. While they are well suited for high-output voltages, the peak currents are very high, and the topology does not lend itself well to output current above 10A. One advantage of the flyback topology over the other isolated topologies is that many of them require a separate storage inductor. Since the flyback transformer is in reality the storage inductor, no separate inductor is needed. This, coupled with the fact that the rest of the circuitry is simple, makes the flyback topology a cost effective and popular topology. Forward The forward converter is really just a transformer isolated buck converter. Like the flyback topology, the forward converter is best suited for lower power applications. While efficiency is comparable to the flyback, it does have the disadvantage of having an extra inductor on the output and is not well suited for high voltage outputs. The forward converter does have the advantage over the flyback converter when high output currents are required. Since the output current is non-pulsating, it is well suited for applications where the current is in excess of 15A. Half-Bridge The half-bridge topology, like push-pull topologies, can be scaled up well to higher power levels and is based on the forward converter topology. This topology also has the same issue of the shoot-through current, if both switches are on at the same time. In order to control this, there needs to be a dead-time between the on-time of each switch. This limits the duty-cycle to about 45%. Beneficially, the half-bridge topology switching stresses are equal to the input voltage and make it much more suited to 250VAC and PFC applications. On the flip side, the output currents are much higher than the push-pull topology, thereby making it less suited for high current outputs. Resonant LLC The resonant LLC topology is a half-bridge topology that uses a resonant technique to reduce the switching losses due to zero voltage switching, even in no-load conditions. This topology scales up well to high power levels and has very low losses in devices that are on at all times. This topology is not as well suited for stand-by mode power supplies, as the resonant tank circuit needs to be energized continuously. The resonant LLC also has the advantage over both push-pull and half-bridge topologies of being suitable for a wide range of input voltages. The down side to the resonant LLC topology is its complexity and cost. 15 Switch Mode Power Supply Topologies Compared (continued) Non-Isolated Topologies Power Topology Supply Schematic Power Typical Relative Magnetics (Watts) Efficiency Cost Required DC Transfer Function (VOUT/VIN) Maximum Universal Multiple VOUT<VIN Practical Input Outputs Range Duty Cycle (90-264) VAC VOUT>VIN Range Buck 500 85 1 Single Inductor D 0.9 No No Yes No Boost 150 70 1 Single Inductor 1 _____ 1–D 0.9 No No No Yes BuckBoost 150 70 1 Single Inductor –D _____ 1–D 0.9 No No Yes Yes SEPIC 150 75 1.2 Coupled or Two Inductors D _____ 1–D 0.9 No No Yes Yes Ćuk 150 75 1.2 Coupled or Two Inductors –D _____ 1–D 0.9 No No Yes Yes Flyback 150 75 1.5 Transformer 2xPoutxLPrixFreq ___________ Vin 0.9 Yes Yes Yes Yes Forward 150 75 1.8 Transformer and Inductor 2Ns ___ xD Np 0.45 Yes Yes Yes Yes PushPull 500 80 1.8 Transformer and Inductor Ns ___ xD Np 0.45 No Yes Yes Yes HalfBridge 500 85 2 Transformer and Inductor Ns ___ xD Np 0.45 Yes Yes Yes Yes Resonant LLC 500 90 2 Frequency Dependent Based on Resonant Tank Transfer Function 0.45 Yes Yes Yes Yes Isolated Topologies __________ 16 www.we-online.com Transformer √ Topology Selection Flowchart Topology Selection Flowchart Isolation Required? YES NO NO Power < 70W? YES Complexity & Cost a Concern? IOUT > 10A? VOUT < VIN Range? YES YES NO NO Buck VIN > 200VDC? IOUT < 5A? VOUT > VIN Range or PFC? YES NO YES NO YES NO NO VOUT > 30VDC? Non-Inverting Output Desired? Boost YES IOUT > 10A? NO YES NO NO YES Half-Bridge Push-Pull YES Resonant LLC Flyback Forward Buck-Boost or Ćuk Flyback or SEPIC 17 Infineon Technologies BCR450, TDA4863 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Operating temperature: -40°C to +125°C Applications ■ LED street and indoor lighting Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750845240 180-270 2.6 18.66:1.6:1 47 24 2 15 3.6 IC Characteristics ■ Low voltage drop across sense resistor ■ High output current precision ■ Operating voltage from 8-27V ■ Overvoltage protection ■ Overtemperature current foldback and thermal shutdown 18 www.we-online.com Dimensions & Footprint Infineon ICL8001G-Bulb02 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ LED retrofit bulbs Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750311798 90-135 2.4 0.7 4.44:1:1.074 100 27 0.35 29 2.0 750815141 180-265 6.3 0.2 14.73:1.42:1 100 27 0.35 19 4.5 IC Characteristics ■ Quasi-resonant flyback converter ■ Phase-cut dimming ■ High power factor ■ LED retrofit of 40/60/100W incandescent bulbs Dimensions & Footprint Other Wurth Electronics Components ■ 744862120: 12µH common mode choke 19 Infineon ICL8002G Series Common Characteristics ■ Isolation voltage: 1250VAC to 3750VAC ■ Safety: Functional and reinforced insulation ■ Standards detail: EN60950 ■ Operating temperature: -40°C to +125°C Applications Quasi-resonant flyback converter with Power Factor Correction for 13W dimmable LED bulbs ■ Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750845151 195-265 3.9 11.58:2:1 90 40 0.28 15 3.75 IC Characteristics ■ Smooth dimming curve with high dimmer compatibility ■ High efficiency (>85%) with quasi-resonant flyback operation ■ Very high power factor with low THD (<20%) ■ Compact single state design ■ Primary side control with high accuracy ■ Tight lumen output tolerance ■ Integrated power cell for short time to light ■ Built-in digital soft-start ■ Comprehensive protection functions ■ Low system BOM cost for dimmable bulbs Other Wurth Electronics Components ■ 750341383: 210µH power inductor ■ 750311650: 45mH common mode choke 20 www.we-online.com Dimensions & Footprint Linear Technology LT3798 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ Retrofit lamps Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) UOUT (V) I01 (A) 7508110210 120-200 2.000 0.27 6.67:1:1.67 750813002 85-265 2.000 0.35 20:1:5 750811330 85-265 0.300 4.00 750813144 85-265 0.600 750813134 85-265 750811291 UAUX (V) UT (kVAC) 100 11 0.35 15 4.5 100 3.4 1.00 20 4.5 6:1:1 200 18 5.00 20 4.5 1.75 4:1:0.71 100 28 0.50 20 4.5 0.600 1.75 8:1:1.28 100 14 1.00 18 4.5 85-265 0.400 5.70 1:1:0.24 100 85 0.40 20 4.5 750813390 85-265 0.461 3.15 1:1:0.17 150 125 0.36 20 4.5 750811290 85-265 0.100 9.00 1:1:0.22 75 90 1.00 20 4.5 7508111417 85-265 0.700 1.50 4:1:0.86 100 28 0.50 24 4.5 750811351 85-265 0.180 7.40 4:1:0.67 75 36 3.00 25 4.5 750811248 85-265 0.300 3.50 4:1:1 60-400 24 2.00 24 4.5 750312872 14-43 0.140 25.90 1:1:0.8 50 28 4.00 24 4.5 IC Characteristics Dimensions & Footprint Isolated PFC flyback controller with minimum number of external components ■ ■ Constant current and constant voltage regulation ■ No optocoupler required ■ Active PFC ■ Vin and Vout limited by external components only ■ Low harmonic distortion ■ Accurate regulated voltage and current ■ Energy Star compliant ■ Thermally enhanced 16-lead MSOP package 21 Linear Technology LT3799/LT3799-1 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ Offline 4-100W+ LED applications Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) UOUT (V) I01 (A) 7508110210 120-200 2.000 0.27 6.67:1:1.67 100 11 0.35 15 4.5 750813002 85-265 2.000 0.35 20:1:5 100 3.4 1.00 20 4.5 750811330 85-265 0.300 4.00 6:1:1 200 18 5.00 20 4.5 750813144 85-265 0.600 1.75 4:1:0.71 100 28 0.50 20 4.5 750813134 85-265 0.600 1.75 8:1:1.28 100 14 1.00 18 4.5 750811291 85-265 0.400 5.70 1:1:0.24 100 85 0.40 20 4.5 750813390 85-265 0.100 9.00 1:1:0.22 75 90 1.00 20 4.5 750811290 85-265 0.461 3.15 1:1:0.17 150 125 0.36 20 4.5 7508111417 85-265 0.700 1.50 4:1:0.86 100 28 0.50 24 4.5 750811351 85-265 0.180 7.40 4:1:0.67 75 36 3.00 25 4.5 IC Characteristics Isolated PFC LED driver with minimum number of external components ■ ■ TRIAC dimmable (LT3799 only) ■ No optocoupler required ■ Active PFC >0.97 ■ Vin and Vout limited by external components only ■ Low harmonic content ■ Accurate regulated LED current ■ Open LED and shorted LED protection ■ Thermally enhanced 16-lead MSOP package Other Wurth Electronics Components 22 ■ 750311431: 0.75mH inductor ■ 7447018: 150µH filter choke ■ 7448640418: 33mH common mode choke ■ 744821039: 39mH common mode choke www.we-online.com UAUX (V) UT (kVAC) Dimensions & Footprint NXP Semiconductors SSL210x Series Common Characteristics ■ Isolation voltage: 4000VAC ■ Safety: Reinforced insulation ■ Operating temperature: -40°C to +125°C Applications ■ Retrofit incandescent to 100W Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UT (kVAC) 750340505 85-276 1.08 8:01 100 9-23 0.4-1.05 4 Dimensions & Footprint IC Characteristics ■ TRIAC compatible dimming ■ Shelf and down lighting applications ■ Universal input ■ UM10341: 12W retrofit incandescent ■ UM10386: 19/22W retrofit incandescent Other Wurth Electronics Components for UM10386 ■ 744776268: 680μH power choke ■ 744776233: 330μH power choke ■ 74477120: 100μH power choke 23 NXP Semiconductors SSL2101 (PAR30) Series Common Characteristics ■ Isolation voltage: 1000VAC ■ Safety: Functional insulation ■ Operating temperature: -40°C to +125°C Applications ■ Retrofit PAR30 Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX Uout (V) I01 (A) UT (kVAC) 750311819 130 or 230 0.27 1.375:1 21 0.45 1 750311524 130 or 230 0.18 1.384:1 21 0.45 1 IC Characteristics ■ Power factor of 0.85 ■ Form factor: 2-inch diameter ■ Input: 130V or 230V 24 www.we-online.com Dimensions & Footprint NXP Semiconductors SSL2101 (PAR38) Series Common Characteristics ■ Isolation voltage: 2000VAC ■ Safety: Functional insulation ■ Standards detail: IEC60950-1 ■ Operating temperature: -40°C to +125°C Applications ■ Retrofit PAR38 Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) I02 (A) UAUX (V) UT (kVAC) 750311525 85-265 0.7 1 6:2:1 100 40 0.5 - 20 2 IC Characteristics ■ Designed for long life, high thermal stress, EMC compliance ■ Recommended for US input voltages Dimensions & Footprint Other Wurth Electronics Components ■ 744821120: 20mH common mode choke 25 NXP Semiconductors SSL2101T Series Common Characteristics ■ Isolation voltage: 1500VAC ■ Safety: Functional insulation ■ Operating temperature: -40°C to +125°C Applications ■ Solid State lighting applications under 15W ■ Retrofit lamps such as GU10, E27 etc ■ LED modules such as LED spots, down-lights ■ LED strings suitable for retail displays Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750312870 190-260 0.719 0.75 4.58:1.36:1 100 18-39 0.235 30 4.0 760874040 180-265 1.210 0.50 3.25:1:0.2 100 30 0.300 20 1.5 IC Characteristics ■ Easy migration to existing lighting control infrastructure ■ Thermal enhanced SO16 wide body package ■ Suitable for flyback and buck applications ■ Supports most available dimming solutions Optimized efficiency with valley switching managed by a built-in circuitry ■ ■ Demagnetization detection ■ Overtemperature protection ■ Short-Winding protection and overcurrent protection Internal VCC generation allowing start-up from the rectified mains voltage ■ ■ Natural dimming curve by logarithmic correction, down to 1% Other Wurth Electronics Components ■ 7447452472: 4.7mH THT inductor 26 www.we-online.com Dimensions & Footprint NXP Semiconductors SSL2109 Series Common Characteristics ■ Operating temperature: -40°C to +125°C Applications ■ Retrofit LED lamps ■ Driver modules for LED lighting Electrical Properties Order Code L (mH) IR (mA) RDC (Ω) Vrated (VAC) 750312626 2.1 900 1.53 120-230 IC Characteristics ■ Flyback or buck controller only with external MOSFET ■ Power efficient boundary conduction mode ■ Tight LED current regulation: better than 5% ■ Direct PWM dimming possible ■ Fast transient response via cycle-by-cycle control ■ Full set of internal protections ■ No need for binning on LED forward voltage ■ Support for high PF (>0.9) and universal mains ■ Short bill of materials: only 14 components for full application ■ High efficiency: up to 95% measured on reference board Dimensions & Footprint Other Wurth Electronics Components ■ 820511311: 130VRMS Varistor ■ 820412711: 130VRMS Varistor ■ 768772102: 1mH inductor 27 NXP Semiconductors SSL4101 Series Common Characteristics ■ Isolation voltage: 1600 to 3000VAC ■ Safety: Functional insulation ■ Operating temperature: -40°C to +125°C Applications ■ Industrial high bay and low bay lighting ■ Commercial interior lighting ■ Parking garage and area lighting ■ Street lighting Electrical Properties Order Code LTYP (mH) IR (mA) RDC (Ω) Vrated (VAC) 750312184 4.000 2000 0.034 90-305 750312185 4.800 2000 0.074 90-305 750312186 0.696 2000 0.128 90-305 750312188 0.320 5800 0.134 90-305 IC Characteristics ■ Integrated PFC and flyback controller ■ True universal mains operation High level of integration, resulting in a low external component count and cost effective design ■ ■ On-chip start-up current source ■ Valley switching for minimum switching losses ■ Frequency limitation to reduce switching losses ■ Safe restart mode for system fault conditions ■ Undervoltage and overvoltage protection ■ IC overtemperature protection Other Wurth Electronics Components ■ 750341026: 48V/150W flyback transformer 28 www.we-online.com Dimensions & Footprint NXP Semiconductors UBA2015P Series Common Characteristics ■ Isolation voltage: 1875VAC ■ Safety: Basic insulation ■ Standards detail: IEC60950-1 ■ Operating temperature: -40°C to +125°C Applications ■ Dimmable flourescent HF-TL ballasts including PFC Electrical Properties Order Code LTYP (mH) IR (mA) RDC (Ω) Vrated (VAC) 760800001 0.127 2500 0.30 120 750312352 3.500 2000 2.15 120 750312407 1.100 4000 1.35 90-145 IC Characteristics ■ Dimensions & Footprint Integrated level shifter for the high side driver of half-bridge Integrated bootstrap diode for the high side driver of half- bridge ■ ■ Independent non-overlap time ■ End of Life detection ■ Adjustable pre-heat time and current ■ Lamp ignition failure detection ■ Constant output power independent of mains voltage variation ■ Adustable fixed frequeny pre-heat ■ Hard switching/capacitive mode protection ■ Half-bridge overcurrent (coil saturation) protection Other Wurth Electronics Components ■ 750311081: 9.75mH gate drive transformer 29 NXP Semiconductors UBA2015AT Series Common Characteristics ■ Isolation voltage: 1875VAC ■ Safety: Basic insulation ■ Standards detail: IEC60950-1 ■ Operating temperature: -40°C to +125°C Applications Dimmable fluorescent HF-TL ballasts including PFC ■ Electrical Properties Order Code LTYP (mH) IR (mA) RDC (Ω) 760801080 1.700 2750 1.160 Vrated (VAC) 120 750312407 1.100 4000 0.135 90-144 760800001 0.127 2500 0.300 120 7448640405 33.000 300 2.000 250 IC Characteristics ■ Integrated level shifter for the high side driver of half-bridge ■ Integrated bootstrap diode for the high side driver of half-bridge ■ Independent non-overlap time ■ End of Life detection ■ Adjustable pre-heat time and current ■ Lamp ignition failure detection ■ Constant output power independent of mains voltage variation ■ Adjustable fixed frequency pre-heat ■ Hard switching/capacitive mode protection ■ Half-bridge overcurrent (coil saturation) protection Other Wurth Electronics Components ■ 750311081: 9.75mH gate drive transformer 30 www.we-online.com Dimensions & Footprint NXP Semiconductors UBA2016AT Series Common Characteristics ■ Isolation voltage: 1875VAC ■ Safety: Basic insulation ■ Standards detail: IEC60950-1 ■ Operating temperature: -40°C to +125°C Applications ■ Dimmable fluorescent HF-TL ballasts including PFC and boost Electrical Properties Order Code LTYP (mH) RDC (Ω) Vrated (VAC) 750311082 2.5 0.745 265 750311083 2.0 0.490 265 IC Characteristics ■ Integrated 4pin critical conduction mode PFC controller/driver ■ Open and short circuit protection on PFC feedback pin ■ Overcurrent and overvoltage protection ■ End of Life detection ■ Adjustable pre-heat time and current ■ Integrated level shifter for the high side driver of the half-bridge ■ Constant output power independent of mains voltage variation ■ Linear dimming ■ Hard switching/capacitive mode protection ■ Half-bridge overcurrent (coil saturation) protection Dimensions & Footprint Other Wurth Electronics Components ■ 750311081: 9.75mH gate drive transformer 31 ON Semiconductor AND8463/D Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ TRIAC and ELV retrofit PAR30 Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750311620 20-135 1.9 0.62 1.57:1.31:1 53-120 25 0.45 19 4.5 IC Characteristics ■ US or European input voltage range ■ TRIAC and ELV compatible dimming ■ Compliant with FCC Class B conducted emissions Other Wurth Electronics Components ■ 750311431: 800μH inductor for US and Europe ■ 750311826: 1.6mH inductor for US 32 www.we-online.com Dimensions & Footprint ON Semiconductor NCL30000LED1GEVB/D Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ LED driver power supplies ■ LED based down lights ■ Commercial and residential LED fixtures ■ TRIAC dimmable LED based PAR lamps ■ PFC constant voltage supplies Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) 750311475 90-135 1.72 2.54:1 70 25,50 0.35 0.7 15 4.5 750311215 90-135 0.87 6.6:1:1.66 70 12-50 0.35 - 15 4.5 IC Characteristics ■ Critical conduction mode for flyback ■ Constant on-time PWM control ■ Cycle-by-cycle current protection ■ Low current sense threshold of 500mV ■ Low 2mA typical operating current ■ No input voltage sensing required I02 (A) UAUX (V) UT (kVAC) Dimensions & Footprint Other Wurth Electronics Components ■ 750311431: 750mH inductor ■ 7446620027: 27mH common mode choke 33 ON Semiconductor NCL30000LED2GEVB/D Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ LED driver power supplies ■ LED based down lights ■ Commercial and residential LED fixtures ■ TRIAC dimmable LED based PAR lamps ■ PFC constant voltage supplies Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) 750311475 90-135 1.72 2.54:1 70 25,50 0.35 0.7 15 4.5 750311215 90-135 0.87 6.6:1:1.66 70 12-50 0.35 - 15 4.5 IC Characteristics ■ Critical conduction mode for flyback ■ Constant on-time PWM control ■ Cycle-by-cycle current protection ■ Low current sense threshold of 500mV ■ Low 2mA typical operating current ■ No input voltage sensing required Other Wurth Electronics Components ■ 750311505: 470mH input filter inductor ■ 7446620027: 27mH common mode choke 34 www.we-online.com I02 (A) UAUX (V) UT (kVAC) Dimensions & Footprint ON Semiconductor NCL30000LED3GEVB Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ LED driver power supplies ■ LED based down lights ■ Commercial and residential LED fixtures ■ TRIAC dimmable LED based PAR lamps ■ PFC constant voltage supplies Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) 750311475 90-135 1.72 2.54:1 70 25,50 0.35 0.7 15 4.5 750311215 90-135 0.87 6.6:1:1.66 70 12-50 0.35 - 15 4.5 IC Characteristics ■ Critical conduction mode for flyback ■ Constant on-time PWM control ■ Cycle-by-cycle current protection ■ Low current sense threshold of 500mV ■ Low 2mA typical operating current ■ No input voltage sensing required I02 (A) UAUX (V) UT (kVAC) Dimensions & Footprint Other Wurth Electronics Components ■ 7446620027: 27mH common mode choke 35 ON Semiconductor NCL30001, AND8427/D Series Common Characteristics ■ Isolation voltage: 3000VAC ■ Safety: Reinforced insulation ■ Operating temperature: -40°C to +125°C Applications ■ LED street lights ■ Low bay LED lighting ■ High power LED drivers ■ Architectural LED lighting Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750311267 85-265 0.625 2.24:1:0.232 70 50 1.5 28 3 750311269 85-265 0.600 4:1:1 70 28 3.2 28 3 Dimensions & Footprint IC Characteristics ■ Voltage feed forward improves loop response ■ Frequency jittering reduces EMI signature ■ Proprietary soft-skip at light loads reduces acoustic noise ■ Brown out detector ■ Internal 160ms fault timer Independent latch-off input facilitates implementation of overvoltage and overtemperature fault detectors ■ 36 www.we-online.com ON Semiconductor NCL30002 Series Common Characteristics ■ Isolation voltage: 500VAC ■ Safety: Functional insulation ■ Operating temperature: -40°C to +125°C Applications ■ LED bulbs ■ LED downlights ■ Power Factor Corrected LED Drivers ■ LED fluorescent tube replacements Electrical Properties Order Code L (mH) IR (mA) RDC (Ω) 750313017 0.125 3300 0.2 750313062 0.155 2600 0.2 IC Characteristics ■ Low 485mV current sense threshold ■ Low typical start-up current 24μA ■ Fixed on time/peak current PFC architecture ■ Maximum VCC of 20VDC Dimensions & Footprint Other Wurth Electronics Components ■ 7447462471: 470µH inductor 37 ON Semiconductor NCP1014 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ Energy Star residential LED luminaire applications ■ Under-cabinet lights ■ Outdoor porch lights Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750811042 90-265 1.8 0.4 5.25:1:0.123 100 24 0.36 20 4.5 Dimensions & Footprint IC Characteristics ■ Built-in 700V MOSFET with typical Rds(on) of 11 or 22Ω ■ Large creepage distance between high voltage pins Current mode fixed frequency operation 65kHz, 100kHz, 130kHz ■ ■ Skip-cycle operation at low peak currents only ■ Internal 1ms soft-start ■ Auto-recovery internal output short circuit protection ■ Latched overvoltage protection if auxiliary winding is used 38 www.we-online.com ON Semiconductor NCL30080/NCL30081 Series Common Characteristics ■ Isolation voltage: 4000VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61347 ■ Operating temperature: -40°C to +125°C Applications ■ LED bulbs ■ LED power supply drivers ■ LED light engines ■ Electronic control gear for LEDs ■ GU10, PAR16 based LED lamps ■ Flyback LED drivers Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750313306 90-265 1.5 0.42 5:1:1.64 100 9.75 0.5 16 4 IC Characteristics ■ Primary side sensing ■ Wide VCC range ■ Precise LED current regulation of 1% typical ■ 0.9PF with passive valley fill ■ Open and short circuit protection ■ Secondary diode short protection ■ Input line voltage sensing ■ User programmable thermal feedback ■ Analog and digital dimming input ■ Tight current regulation accuracy +/-1% typical ■ Compact thin TSOP6 package (3x3 mm footprint) ■ NCL30081 supports step dimming ■ Universal input voltage range ■ 83% typical efficiency Dimensions & Footprint Other Wurth Electronics Components ■ 7447462152: 1.5mH radial leaded wire wound inductor 39 ON Semiconductor NCL30082/NCL30083 Series Common Characteristics ■ Isolation voltage: 3000VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61347 ■ Operating temperature: -40°C to +125°C Applications ■ LED bulbs ■ LED power supply drivers ■ LED light engines ■ A19 based LED lamp, 10W normal output power ■ Isolated flyback LED drivers ■ Typical efficiency range of 87% to 90% ■ Supports 350-700mA output current with resistor change ■ Non isolated buck-boost topology Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750313435 90-265 0.70 1 3:1:1.14 100 14 0.7 16 3 750313436 90-265 0.95 1 3:1 100 - - 16 1 Dimensions & Footprint IC Characteristics Primary side sensing Wide VCC range ■ Precise LED current regulation of 1% typical ■ 0.9PF with passive valley fill ■ Open and short circuit protection ■ Secondary diode short protection ■ Input line voltage sensing ■100-265V input AC ■ Exceeds US Energy Star bulb power factor requirement ■ Complies with IEC61000-3-2 Class C harmonic specifications ■ Universal input range ■ Tight current regulation accuracy +/-1% typical ■ Supports wide LED forward voltage range ■ User programmable thermal foldback ■ Compact Micro8 package (3x5mm Footprint) ■ NCL30082 supports analog/digital dimming ■ ■ ■ NCL30083 supports step dimming Other Wurth Electronics Components ■ 7447462221: 220μ H radial leaded wire wound inductor ■ 7447462152: 1.5mH radial leaded wire wound inductor 40 www.we-online.com Texas Instruments LM3445, AN-2034 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ LED lamps ■ Downlights ■ Retrofit bulbs Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX 750311553 90-140 0.803 4:1 fswitch (kHz) Uout (V) 100 25 I01 (A) UT (kVAC) 0.4 4.5 IC Characteristics ■ Universal input voltage range ■ Capable of controlling LED currents >1A ■ Adjustable switching frequency ■ Low quiescent current Dimensions & Footprint Adaptive programmable off-time allows for constant ripple current ■ ■ Thermal shutdown ■ No 120Hz flicker ■ Low profile 10pin MSOP package or 9 lead SOIC package 41 Texas Instruments LM3445, AN-2069 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ LED lamps ■ Downlights ■ Retrofit bulbs Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) I02 (A) UAUX (V) UT (kVAC) 750815040 210-265 2.12 0.75 5.384:1:0.76 65 20 0.35 0.002 IC Characteristics ■ Universal input voltage range ■ Capable of controlling LED currents >1A ■ Adjustable switching frequency ■ Low quiescent current Adaptive programmable off-time allows for constant ripple current ■ ■ Thermal shutdown ■ No 120Hz flicker ■ Low profile 10pin MSOP package or 9 lead SOIC package 42 www.we-online.com 15 4.5 Dimensions & Footprint Texas Instruments LM3448 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC60950-1 and IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ Retrofit TRIAC dimming ■ Solid State lighting ■ Industrial and commercial lighting ■ Residential lighting Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750813046 120-200 1.44 0.6 3.94:1:0.47 72 26.6 0.25 12 4.5 750813045 85-130 2.40 0.4 10.72:1:0.81 30 19.5 0.35 16 4.5 IC Characteristics ■ Input phase angle dim decoder circuit for LED dimming ■ Integrated 600V MOSFET ■ Universal input operation ■ Adjustable switching frequency ■ Low profile, 16pin narrow SOIC package Dimensions & Footprint Adaptive programmable off-time allows for constant ripple current ■ ■ No 120Hz flicker possible ■ Low quiescent current ■ Thermal shutdown ■ Wave solder capability 43 Texas Instruments LM3450 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ Indoor and outdoor area lights ■ Bay lighting ■ Down lighting Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UT (kVAC) 750813550 90-135 0.8035 2.54:1 100 50 0.35 4.5 IC Characteristics ■ Critical conduction mode PFC ■ Phase dimming decoder ■ Configurable for 10-100W loads ■ Designed for US input voltage 44 www.we-online.com Dimensions & Footprint Texas Instruments LM5021 Series Common Characteristics ■ Isolation voltage: 1875VAC per second ■ Safety: Functional insulation ■ Standards detail: UL1310 ■ Operating temperature: -40°C to +125°C Applications Strings of LED lighting ■ Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750311959 120 0.54 2.2 5:1:0.83 80 20 1.43 20 1.5 IC Characteristics ■ Ultra low start-up current (25μA max) ■ Current mode control ■ Skip cycle mode for low stand-by power ■ Single resistor programmable oscillator ■ Adjustable soft start ■ Integrated 0.7A peak gate driver ■ Direct opto coupler interface ■ Maximum duty cycle limiting ■ Slope compensation ■ Overcurrent protection Dimensions & Footprint 45 Texas Instruments TPS92010EVM-592 Series Common Characteristics ■ Isolation voltage: 2000VAC ■ Safety: Functional insulation ■ Standards detail: IEC60950-1 ■ Operating temperature: -40°C to +125°C Applications ■ Household light bulb replacment Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX Uout (V) I01 (A) UT (kVAC) 750310787 100-130 2.8 11.57:1:0.823 14-18 0.34 2 IC Characteristics ■ TRIAC compatible dimming ■ 100-130VRMS input voltage ■ Constant current to LEDs ■ Modified output current Other Wurth Electronics Components 7447462221: 220μ H radial leaded wire wound inductor ■ ■ 7447462152: 1.5mH radial leaded wire wound inductor ■ 750310784: 50mH common mode choke 46 www.we-online.com Dimensions & Footprint Texas Instruments TPS92010EVM-631 Series Common Characteristics ■ Isolation voltage: 2000VAC ■ Safety: Functional insulation ■ Standards detail: IEC60950-1 ■ Operating temperature: -40°C to +125°C Applications ■ Household light bulb replacment Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX Uout (V) I01 (A) UT (kVAC) 750310787 100-130 2.80 11.57:1:0.823 14-18 0.34 2 750310334 185-265 9.94 01:01.2 12 0.41 2 IC Characteristics ■ TRIAC compatible dimming ■ 100-130VRMS input voltage ■ Constant current to LEDs ■ Modified output current Dimensions & Footprint Other Wurth Electronics Components ■ 750310784: 50mH common mode choke 47 Texas Instruments TPS92070 Series Common Characteristics ■ ■ ■ ■ Isolation voltage: 1875-4500VAC Safety: Functional, supplementary and reinforced insulation Standards detail: IEC60950-1 Operating temperature: -40°C to +125°C Applications ■ LED light bulb replacements ■ LED luminairies ■ LED downlights ■ LED wall washers Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 7508110410 180-265 13.80 0.225 18.5:1:0.8 30 19.5 0.35 10 4.5 750082157 180-265 0.45 - 1:1 20-138 - - - 3.0 Dimensions & Footprint IC Characteristics ■ Advanced integrated dimmable interface ■ Non-dissipative TRIAC dimmable management ■ Lamp-to-lamp uniformity during dimming ■ No low frequency photometric ripple ■ Exponential dimming profile ■ Secondary side feedback eliminates optocouplers ■ LED current regulation better than 5% ■ Programmable minimum LED current ■ Leading edge dimmer detection Power factor >0.8 ■ Other Wurth Electronics Components ■ 768772102: 1mH/500mA inductor ■ 750310784: 50mH common mode choke 48 www.we-online.com Texas Instruments TPS92210-PMP6001 Series Common Characteristics ■ Isolation voltage: 3750VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC60950-1 ■ Operating temperature: -40°C to +125°C Applications ■ Non-dimmable light bulb replacement Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) I02 (A) UT (kVAC) 750811146 90-265 0.43 1.6 2.91:1:0.45 130 38 0.35 - 3.75 Dimensions & Footprint IC Characteristics ■ Isolated discontinuous flyback topology ■ Single stage PFC ■ Universal input voltage 49 Texas Instruments TPS92210 Series Common Characteristics ■ Isolation voltage: 3750VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC60950-1 ■ Operating temperature: -40°C to +125°C Applications ■ Light bulb replacement Electrical Properties Order Code Ui (VAC) L (mH) ISAT (A) NP:NS:NAUX fswitch (kHz) UT (kVAC) 750811148 88-269 0.43 1.5 2.91:1:0.54 130 3.75 750311650 88-269 45.00 0.2 1:1 130 1.50 IC Characteristics ■ TRIAC compatible dimming ■ Constant current control ■ High PFC ■ Drives 10 high brightness LEDs up to 11W ■ PMP6002: 11W replacement: 90-135RMS ■ PMP6003: 11W replacement: 180-265RMS Dimensions & Footprint 3 88-269VAC 130kHz 10 2 SEC 7 1 5 Aux 4 50 www.we-online.com Texas Instruments TPS92310 Series Common Characteristics ■ Isolation voltage: 4500VAC ■ Safety: Reinforced insulation ■ Standards detail: IEC61558-2-17 ■ Operating temperature: -40°C to +125°C Applications ■ LED lamps A19, PAR30/38, GU10 Solid State lighting ■ Electrical Properties Order Code Ui (VAC) L (mH) NP:NS:NAUX fswitch (kHz) Uout (V) I01 (A) UAUX (V) UT (kVAC) 750341086 85-135 0.85 3.808:1:1 100 22 0.35 22 4.5 750341087 180-265 3.00 7.615:1:1 100 22 0.35 22 4.5 IC Characteristics ■ Integrated 600V power MOSFET ■ Primary side sensing ■ Adaptive on-time control with inherent PFC ■ CCM with zero current detection for valley switching ■ Programmable switch turn-on delay ■ Programmable constant on-time and peak current control ■ Overtemperature protection Dimensions & Footprint 51 Dual Coil Common Mode Choke Characteristics ■ Common mode and differential mode choke all-in-one ■ High suppression of common mode and differential mode noise ■ High differential inductance ■ Extremely compact design ■ Reduces number of components ■ Small PCB footprint ■ Operating temperature: -40˚C to 125˚C Applications ■ LED lighting ■ CCFL lighting ■ Offline switching power ■ Suppression of both common and differential mode noise ■ Filtering on device with unstable ground ■ Power line input and output filters ■ Power electronics ■ Electronic ballasts ■ White goods ■ Power tools Dimensions & Footprint Electrical Properties Part Number LTYP (mH) LLKG-MIN (mH) ISAT1 (mA) IRMS2 (mA) SRFTYP (kHz) DCR3 (Ω) Size LxWxH (mm) 750311861 2.5 0.3 800 760 1500 0.7 8.7 x 15.8 x 13.6 750311895 6.0 0.7 500 450 850 1.6 8.7 x 15.8 x 13.6 750311896 10.0 1.1 350 370 800 2.5 8.7 x 15.8 x 13.6 750311897 24.0 2.5 250 240 440 6.3 8.7 x 15.8 x 13 750311650 45.0 4.0 200 180 300 10.0 8.7 x 15.8 x 13 750311898 57.0 6.5 150 160 280 15.7 8.7 x 15.8 x 13 750311899 140.0 19.0 100 900 190 39.0 8.7 x 15.8 x 13 Common Mode and Differential Mode Attenuation 1. The current which causes 20% roll off from the inductance at no DC. 2. The heating current which causes a temperature rise of 40°C with no heat sinking. 3. Typical DCR is for one coil only; double this for both coils in series. Differential Mode Insertion loss [dB] Common Mode Frequency [MHz] 52 www.we-online.com 750311899 750311898 750311650 750311897 750311896 750311895 750311861 WE-TFC Common Mode Power Line Choke Characteristics ■ Small size ■ 4.0mm creepage between windings ■ Operating temperature: -40˚C to +125˚C ■ Cost effective ■ High common mode and differential mode impedance Applications ■ 110/240VAC main-line applications ■ Perfect for offline and LED applications ■ CCFL lighting ■ Filtering on device with unstable ground ■ Power line input and output filters ■ Power electronics ■ Electronic ballasts ■ White goods ■ Power tools Dimensions & Footprint Electrical Properties Part Number Inductance (mH) IRMS (A) SRF (kHz) DCR max. (Ω) Size LxWxH (mm) 744862018 1.8 1.00 1000 0.31 11 x 17 x 17 744862033 3.3 0.80 610 0.51 11 x 17 x 17 744862056 5.6 0.60 450 0.83 11 x 17 x 17 744862082 8.2 0.50 350 1.30 11 x 17 x 17 744862120 12.0 0.40 240 2.00 11 x 17 x 17 744862180 18.0 0.30 200 3.10 11 x 17 x 17 744862250 25.0 0.25 170 3.60 11 x 17 x 17 Common Mode and Differential Mode Attenuation 53 more than you expect Added value for you. More than you expect! n Speedy Design & Sample Service n Innovative n Logistic Designs Solutions n Global Account Designs of Leading IC Manufacturers Support through Solution-Oriented Employees www.we-online.com Quality Management n Reference n Direct Speedy Sample Service Innovative Designs Direct Support Logistics Time to Market Global Account Management INSIGHT DESIGN 9999458 • MARCH 2013 • Revision 4 n Fast Time-to-Market