DC-DC Telecom & Networking Solutions Applications / End Products • • • • • • • • • • • • • • • • • Fan Out Buffer Clock Switching Data Loopback HCSL FBDIMM SDH/Sonet High Speed Precision Edge General Purpose Clock Generation Infiniband 10G Ethernet 1G Ethernet PCIe iSCSI Fiber Distributed Data Interface Fiber Channel Reduction of System Clock Noise General Purpose Data & Clock Interface Precision Clock Synchronization www.onsemi.com 2 • • • • • • • • • Work Stations Routers Switches Network Telecom Line Card Base Station Servers Datacom ON Semiconductor Offers a Total Solution Clock Distribution Clock Generation ECL Logic Op Amp Comparators Signal & Interface Surge Protection ESD Protection Voltage Translators www.onsemi.com 3 Distributed Power Architecture in Telecom / Networking Equipment +15 V +12 V 48 V DC Bus Battery Backup +5 V +12 V +3.3 V +2.5 V +1.8 V +1.0 V www.onsemi.com 4 Power Architecture in Datacom Products +5 V +3.3 V +2.5 V +1.1 V Adapter (+12 V / +18 V / +24 V) www.onsemi.com 5 Distributed Power Solution AC convert to -48 V -48 V Hot Swap Isolate Power Conversion POL Solutions N+1 Redundant AC In AC-DC Converters Hot Swap AC-DC Converters Hot Swap -48 V Batteries + 0 V (GND) www.onsemi.com DC-DC NCP1562 Active Clamp ORing Diode MosFET DC-DC ORing Diode CS51021 MosFET Forward/Flyback DC-DC NCP1030/1 Secondary Bias - 6 Non-Isolate Power Conversion Vbias / 12 V@6 W DC-DC NCP54XX 3.3 V @ 50 A DC-DC NCP3020 1.2 V @ 12 A DC-DC NCP1034 5.0 V @ 15 A DC-DC NCP3101/2 1.5 V @ 6 A 1.2 V @ 10 A 5.0 V @ 3 A DC-DC NCP312x 3.3 V @ 3 A MOSFETs Diodes LDO Rectifiers Networking Power – Reference Design • Solution : – – • Target Application : – – – • NCP1034 NTD3055, NTD24N06 Networking power Datacom +24 V / +48 V Power Specification : – – – – – – – – Input : +48 V (+/-10%) Output-1 : 5.0 V @ 8 A Output-2 : 12 V @ 5 A Protection: Current Limit, UVLO @ 24 V, Pre-Bias Load Efficiency: Target >85% Isolated: NO Must use ceramic capacitors Synchronize outputs for reduced EMI www.onsemi.com 7 Component / Topology Justification • Need synchronization capability to reduce EMI/EMC • Need to meet good efficiency with optimized external MOSFETs and scale output current per the requirement • Non-isolated offers ability to use lower cost standard buck • NCP1034 offers: – – – – – Up to 100 V input & 2 A synchronous gate drive Synchronization input Output voltage down to 1.25 V Externally adjustable UVLO ENABLE with low power mode www.onsemi.com 8 NCP1034 – 100 V Synchronous Controller Value Proposition The NCP1034 is a flexible synchronous PWM controller designed to operate from wide input supply voltage range up to 100 V. The NCP1034 provides a 2 A gate drive and is capable of producing output voltages as low as 1.25 V. Unique Features • Up •2 Benefits to 100 V input • A Drive Capability • • Synchronization • Typical Application diagram & Package info Suitable for +48 V, +60 V, +100 V supplies Drive High Efficiency FETs Fixed frequency for 1 or more devices Others Features • • • • External frequency adjustment Programmable Soft-Start Programmable Over Current Protection Hiccup Current Limit Using MOSFET RDS(on) Wide Input Voltage Range Market & Applications Electronics: xDSL, Modems, • Automotive: CLA, Infotainment, Navigation • Computing: Telecom • Industrial: Power supplies, Process control • Consumer Synchronous Output Ordering info & Support SOIC-16 • NCP1034DR2G: -40 to +125°C Tj • www.onsemi.com 9 Adjustable UVLO Circuit and Block Diagram Type III Comp (ceramic caps) External Current Limit Adjustment www.onsemi.com 10 Synchronization Without Synchronization FFT Analysis With Synchronization NCP1034 is synchronized to the rising edge of the input signal www.onsemi.com 11 Without Synchronization With Synchronization Start-up into Pre-biased Load Dark blue – Output voltage Light blue – SS voltage Green – Output current Purple – Bridge voltage Start to Nominal Load Start to Pre-biased Output The NCP1034 is able to startup into a pre-biased output capacitor. The low−side MOSFET does not turn on before the high−side MOSFET gets the first turn−on pulse. During this time, the energy is not discharged by the low−side MOSFET until the soft−start sequence crosses the programmed output voltage. www.onsemi.com 12 Efficiency 90 85 Efficiency [%] 80 75 70 65 Vout = +5 V 60 55 50 0 0,5 1 1,5 2 2,5 IOUT [A] www.onsemi.com 13 3 3,5 Vin = 38 V 4 Vin = 48 V 4,5 5 Vin = 58 V Reference Design Dual Output 5 A/8 A Device Application Input Voltage NCP1034 Network Switch NCP1034 38 V – 58 V Output Voltage Output Current Topology 12 V 5A Buck 5V 8A Buck NCP1034 Characteristic Min NCP1034 Typ Max Unit Characteristic Output Current 8 A 5 A 200 kHz Oscillator Frequency mV Output Voltage Ripple 20.5 Load Regulation 200 16.5 20.6 mV Load Regulation Iout = 0.1 – 5 A Vin = 48 V 0.34 mV/A Line Regulation Iout = 0.1 – 5 A Vin = 48 V .035 mV/A Line Regulation Iout = 0.1 A 0.004 % Iout = 0.1 A .004 % Iout = 5 A 0.011 % Iout = 5 A .012 % www.onsemi.com 14 Unit V Output Current 16.5 Max 12 5 Output Voltage Ripple Typ Output Voltage Output Voltage Oscillator Frequency Min Networking Power – Reference Design • Solution : – • Target Application : – – – • CS51021 PoE Datacom +48 V Power Specification : – – – – – – Input : +48 V (+/-20%) Output : 5 V @ 5 A Protection: Current Limit, Undervoltage, Overvoltage Efficiency: Target >85% Isolated: YES Must use ceramic capacitors www.onsemi.com 15 Component / Topology Justification • Forward Converter – High efficiency, small output filter, low output ripple, – High density board design – Isolation between input and output • CS51021 offers: – – – – 1 MHz Frequency Capability Over Voltage Protection with Programmable Hysteresis Programmable Pulse-by-Pulse Over Current Protection Current mode control with leading edge blanking www.onsemi.com 16 Max Duty Cycle Control Circuit and Block Diagram Adjustable Current Limit (1st and 2nd threshold) Current Mode Operation w/ adj slope compensation www.onsemi.com 17 CS51021 - Current Mode PWM Controller Value Proposition The CS51021A Fixed Frequency PWM Current Mode Controller family provides all the necessary features required for AC−DC or DC−DC primary side control. Several features are integrated eliminating the additional components needed to implement them externally. Unique Features Benefits 1 A sink/source gate drive High efficiency operation Up to 1 MHz Fsw Optimize for size or efficiency Programmable slope compensation Increased stability Application Data Others Features Programmable Max Duty Cycle Limit Programmable Pulse−By−Pulse Overcurrent Protection Overvoltage Protection with Programmable Hysteresis Bidirectional Synchronization Market & Applications Consumer Electronics: PoE PD, … Automotive: Body electronics, Navigation, … Computing: Power supply, … Industrial: Power supplies, Process control, PoE PD, Solar Power Charger… Capable of being configured as Forward, Flyback or Boost Ordering & Package Information www.onsemi.com 18 SOIC-16 & TSSOP-16 CS51021: -40 to +125°C Tj Measurement Data Efficiency 90.00% 85.00% 80.00% 75.00% Transient Response 70.00% 65.00% 60.00% 55.00% 50.00% Load Regulation www.onsemi.com 19 0.00 0.50 1.00 1.50 2.00 2.50 +48V Input 3.00 3.50 +72V Input 4.00 4.50 5.00 5.50 6.00 Reference Design – Isolated 5 A Output Device Application Input Voltage Output Voltage Output Current Topology CS51021 Network Switch 36 V – 72 V 5V 8A Forward CS51021 Characteristic Min Output Voltage 4.75 5.05 V Output Current 0 5 A Oscillator Frequency Max 330 Output Voltage Ripple Load Regulation Typ 4.99 Unit kHz 50 mV 4.59 V 50 x 53mm www.onsemi.com 20 Basestation Power – Reference Design • Solution : – • Target Application : – – • NCP3102 Basestation, Telecom +18 V Power Specification : – – – – – – – – Input : +12 V (+/-20%) Output : 1.0 V @ 10 A Protection: Current Limit Efficiency: Target >75% @ 18 Vin to 1.0 Vout Isolated: No Must use ceramic capacitors Must be able to regulate up to 18 V input Small size / High power density www.onsemi.com 21 Component / Topology Justification • Application needs: – Wide input voltage range buck regulator capable of low duty cycle and high efficiency conversion to >1.25 V – Small size / High power density – Maintain output voltage accuracy in high temp environment – Lower cost compared to discrete dc-dc module • NCP310x offers: – – – – – Integrated buck regulator with highly efficient FET (~8 mohm) Precision internal reference across wide temp range Thermally enhanced QFN package Output voltage down to 0.8 V Easy system integration simplifying embedded system design www.onsemi.com 22 NCP3102 – 10 A Synchronous Converter Value Proposition The NCP3102 is an integrated wide input voltage high-output current synchronous PWM buck converter. The 10 A output in a small QFN package makes the part ideal for high power density designs. Unique Features Benefits • Highly integrated 10 A solution Application Data • High Power Density ; Reduced Board Space • Integrated FET (10 mΩ HS & LS) • Highly Efficient System (>92% max efficiency) Others Features • 275 kHz Switching frequency • Programmable current limit • 0.8 V +/-1% accurate internal reference Market & Applications • • • Consumer Electronics: CRT, LCD TVs, STB, DVD, … Computing: Power supply Industrial: Power supplies, Base Station, Broadband & Optical Communication Infrastructure Integrated 8 mΩ mΩ HS and LS FET Ordering & Package Information • QFN-40 • NCP3102: 0 to +85°C • NCP3102B: -40 to +85°C www.onsemi.com 23 Minimal Support Components & Ceramic Output Capacitors Circuit and Block Diagram Snubber circuit to limit the max voltage spikes Regulation circuit to provide startup bias 8 mΩ HS-FET & 8 mΩ LS-FET provide high efficiency www.onsemi.com 24 External Bias Circuit • A simple external circuit was used to extend the input voltage capability of the NCP3102 from 13.2 V to 19 V. The internal PWM control section of the NCP3102 uses a different power rail than the power FET's. Therefore, the snubber and regulation circuitry shown in Figure 4 can power the low voltage control section separately. www.onsemi.com 25 Snubber Circuitry • The circuit shown in Figure 4 and 5 serves as a regulator, startup delay, and snubber / EMI suppressor. www.onsemi.com 26 Efficiency www.onsemi.com 27 Reference Design – 10 A Regulator Device Application Input Voltage Output Voltage Output Current Topology NCP3102 Base Station 9.6-14.4 V (18 V) 1.0 V 10 A Buck NCP3102 Characteristic Min Typ Max Unit Output Voltage 1.0 Output Current 10 A Oscillator Frequency 275 kHz Output Voltage Ripple 10 mV 0.27 mV/A Load Regulation Iout = 0.5 – 10 A Vin = 18 V 55 x 50mm Physical Size www.onsemi.com 28 • Telecom Point-of-Load Power – Reference Design Solution : – • Target Application : – – • NCP3121 Telecom, Datacom WLAN, Cable Modem, xDSL Specification : – – – – – – – – Input : +12 V (+/-10%) Output-1 : 5.0 V @ 3 A Output-2 : 3.3 V @ 3 A Protection: Current Limit Efficiency: Target >80% Isolated: No Must use ceramic capacitors Small size / High power density www.onsemi.com 29 Component / Topology Justification • Application needs: – Sequencing capability for power-up and power-down to meet new chipset requirements (FPGA, ASIC, etc.) – Small size / High power density – High volume / Low cost solution • NCP3121 offers: – – – – Integrated dual 3 A buck regulator Precision internal reference across wide temp range Thermally enhanced QFN package Auto-Tracking and Sequencing feature built-in www.onsemi.com 30 Circuit and Block Diagram 180° out of phase reduces input cap Integrated dual 3 A FET Integrated Sequencing Capability www.onsemi.com 31 Sequencing Requirements Sequencing guaranteed on power-up and power-down • Prevent false data from being loaded in I/O buffers • Timing requirement must also be meet (t1, t2, t3) • Protect the ASIC from damage (reverse bias ESD structure) www.onsemi.com 32 Auto-Tracking & Sequencing • The NCP3120 can operate as a standalone switching converter or it can support autotracking and sequencing • Adjustment of the soft-start capacitors allows guaranteed power-up and power-down operation • Enable, Sequence and Track set the configuration • Several devices are also capable of being daisy chained together to manage multiple outputs Eliminates the Need for Additional External Components to Guarantee Power Management www.onsemi.com 33 Sequencing Sequencing: The second output voltage starts ramping when the first output voltage is already settled. www.onsemi.com 34 Eliminates External Sequence Chip LM3880 - Power Sequencer LT2928 – Power Supply Sequencer ADM1086 – Voltage Sequencer • Built-in auto-tracking and sequencing capability eliminates the need to use an external chip to manage this function and guarantee performance www.onsemi.com 35 Reference Design Dual Output 3 A / 3 A Device Application NCP3121 Input Voltage 10.8 – 13.2 V xDSL Output Voltage Output Current Topology 5V 3A Buck 3.3 V 3A Buck NCP3121 (output-1) Characteristic Min Output Voltage 2.274 Output Current 0 Oscillator Frequency Typ 3.28 NCP3121 (output-2) Max 5 69 Min 4.982 V Output Voltage 3 A Output Current 98 Typ 5.00 Max 5.019 3 Unit V A 300 kHz Oscillator Frequency mV Output Voltage Ripple Load Regulation 5 73 156 mV Load Regulation Iout = 0.1 – 3A Vin = 12V 2.97 mV/A Line Regulation Iout = 0.1 – 3 A Vin = 12V 4.63 mV/A Line Regulation Iout = 0.1A .35 .47 .64 % Iout = 0.1A -.01 .00 .11 % Iout = 3A .64 .70 .76 % Iout = 3A -.36 -.28 -.20 % www.onsemi.com 36 Characteristic 3.298 300 Output Voltage Ripple Unit Telecom Bias Supply – Reference Design • Solution : – • Target Application : – • NCP1031 Basestation, Networking Specification : – – – – – – – – Input : +35 V to +76 V (+48 V) Output-1 : 12 V Power: 2 W Protection: Current Limit, UV/OV Efficiency: Target >80% Isolated: Yes Must use ceramic capacitors Small size / High power density www.onsemi.com 37 Component / Topology Justification • Application needs: – Small size / High power density. Minimal number of support components. – Wide input voltage range to cover +48 V Telecom • NCP1030 offers: – – – – Integrated power switch Internal start-up regulator ; direct power from input voltage Improved efficiency with SENSEFET™ Reduced EMI with integrated gate drive and power switch www.onsemi.com 38 NCP1030/31 – PWM Controller & Power Switch Value Proposition The NCP1030 and NCP1031 are a family of miniature high-voltage monolithic switching regulators with on-chip Power Switch and Startup Circuits. The NCP103x can be configured in any single-ended topology such as forward or flyback. Unique Features Benefits • 200 V Switch • • Up to 1 MHz Fsw • • Synchronization • Typical Application diagram & Package info Suitable for +48 V, +60 V, +100 V supplies Reduced size Fixed frequency for 1 or more devices Others Features • • • • Internal Start-up Circuit with aux winding override External frequency synchronization Trimmed +/-2% internal reference Active Leading Edge Blanking (LEB) Circuit Market & Applications • • • Consumer Electronics: xDSL, Modems Computing: Telecom Industrial: Power supplies, Process control, Low Power Bias supply, 2nd Side Bias w/ isolated dc-dc Minimal Number of External Components Ordering info & Support NCP1030: Micro-8 • NCP1031: SOIC-8 & DFN-8 • www.onsemi.com 39 Schematic Integrated 200 V Power Switch w/ SenseFET Integrated startup regulator Dynamic Self-Supply (DSS) from the Vcc capacitor External adjustment of over voltage and under voltage trip point www.onsemi.com 40 Integrate Key Function • NCP1030: Integrates - Supervisory - PWM Controller - Power Switch • Discrete Implementation: www.onsemi.com 41 Reduced PCB Space / Higher Density • A bias supply implemented using the NCP1030 compared to a TL384x and MAX6457 solution results in a footprint area saving of 91%!!!! www.onsemi.com 42 Performance Data www.onsemi.com 43 Efficiency Line & Load Regulation <80% Efficiency Line Regulation = 0.5% Load Regulation = 8% Reference Design – 2 W Bias Supply Device Application Input Voltage Output Voltage Output Power Topology NCP1030 Base Station 48 V (36-72 V) 12 V 2W Flyback NCP1030 Characteristic Min Typ Max Unit Output Voltage 10.8 13.2 V Output Current 0.017 0.17 A 300 kHz Oscillator Frequency 250 275 Output Voltage Ripple 50 mV Load Regulation 0.8 % Output Power 2.0 W 20 x 35mm Physical Size www.onsemi.com 44 Delivering Total Solutions Clock Distribution Clock Generation ECL Logic Op Amp Comparators Signal & Interface Surge Protection ESD Protection Voltage Translators DC-DC Controllers DC-DC Regulators www.onsemi.com 45 Pow er E Solu fficient tion s Product Reference Designs nd a in a h g C n i y r l u p t Sup nufac Ma For More Information • View the extensive portfolio of power management products from ON Semiconductor at www.onsemi.com • View reference designs, design notes, and other material supporting the design of highly efficient power supplies at www.onsemi.com/powersupplies www.onsemi.com 46