TEA1721AT HV start-up flyback controller with integrated MOSFET for 5 W applications, 430 Hz burst frequency Rev. 2.1 — 7 June 2012 Product data sheet 1. Product profile 1.1 General description The TEA1721 is a small and low cost module Switched Mode Power Supply (SMPS) controller IC for low power applications (up to 5 W) and operates directly from the rectified universal mains input. The device includes a high voltage power switch (700 V) and has been optimized for flyback converter topologies to provide high-efficiency over the entire load range with ultra-low power consumption in the no-load condition. It provides a circuit for start-up directly from the rectified mains voltage without any external bleeder circuits. The converter operates as a regulated voltage source from no-load up to the maximum output current and operates as current source that delivers the maximum current over a broad output voltage range. Using the TEA1721, a low power converter can be built at minimum cost and with the minimum number of external components. The controller regulates the output voltage with primary-side sensing which eliminates the need for an additional secondary feedback circuitry and simplifies the design. At higher power levels, a frequency and current control mode is used. It operates with Burst mode control at low power levels and no-load condition. The burst mode minimizes audible noise and provides an energy saver state which reduces the power consumption in no-load condition. The Burst mode frequency of 430 Hz enables no-load power consumption below < 10 mW at high mains input. 1.2 Features and benefits Power features: Low power SMPS controller with integrated power switch designed for applications up to 5 W 700 V high voltage power switch for global mains operation Primary sensing for control of the output voltage without optocoupler and secondary feedback circuitry Minimizes audible noise in all operation modes USB battery charging and Energy Star 2.0 compliant Jitter function for reduced EMI TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W Green features: Enables no-load power consumption below < 10 mW Very low supply current in no-load condition with energy saver mode Incorporates a high voltage start-up circuit with zero current consumption under normal switching operation Available in halogen-free and Restriction of Hazardous Substances (RoHS) SO7 package Protective functions: OverVoltage Protection (OVP) on Feedback control (FB) pin with auto-restart UnderVoltage LockOut (UVLO) protection on IC supply pin OverTemperature Protection (OTP) Soft-start by reduced peak current for zero and low output voltage Demagnetization protection for guaranteed discontinuous conduction mode operation Open and short-circuit protection of the Feedback control (FB) pin Short-circuit protection of the charger output 1.3 Applications Battery chargers for cellular phones and other low power adapters up to 5 W Standby supply for TV and desktop PC Power supply for white goods applications 1.4 Quick reference data Table 1. Symbol Quick reference data Parameter Conditions Min Typ Max Unit Ids = 30 mA; Tj = 25 °C 13 15.5 17 Ω Hz Power switch (Pin: DRAIN) RDSon drain-source on-state resistance Oscillator (Pins: DRAIN and SOURCE) fburst burst frequency burst frequency in CVB mode, without jitter 390 430 470 fosc-high oscillator frequency High maximum switching frequency in CV and CC mode, without jitter 48 50.5 53 kHz 15 17 19 V 7.5 8.5 9.5 V Supply (Pin: VCC) TEA1721AT Product data sheet VCC(startup) start-up supply voltage VCC(stop) stop supply voltage undervoltage lockout of IC All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 2 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 2. Ordering information Table 2. Ordering information Type number Package TEA1721AT/N1 Name Description Version SO7 plastic small outline package; 7 leads; body width 3.9 mm SOT1175-1 3. Block diagram 3.1 Block diagram start-up source VCC DRAIN START STOP enable REFERENCES AND TEMPERATURE PROTECTION OTP BURST REGULATOR Vref FB VFBS SENSOR demag fosc, VSOURCE AND JITTER controller and cable REGULATOR VOVP(FBS) OSCILLATOR fburst fSW CONTROL LOGIC driver power switch compensation VSOURCE comparator SOURCE GND Vpeak TEA1721 001aan293 Fig 1. Block diagram TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 3 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 4. Pinning information 4.1 Pinning 7 DRAIN 3 6 SOURCE 4 5 VCC GND1 1 GND2 2 GND3 FB TEA1721 001aan294 Fig 2. Pinning top view 4.2 Pin description Pin Pin name I/O type 1 GND1 ground 2 GND2 ground 3 GND3 ground 4 FB 5 VCC I supply input 6 SOURCE O source for power switch 7 DRAIN I drain of power switch - - I Pin description feedback input for voltage sensing high voltage spacer 5. Functional description 5.1 Start-up The TEA1721 starts up by charging the VCC capacitor until the VCC(start) level. The charging current flows from the high voltage DRAIN pin via an internal start-up current source to the VCC pin. Once the start level has been reached the start-up current source is switched off. During switching operation, the start-up current source remains current-less and has zero bleeder loss. 5.2 Primary sensing The FB input senses the reflected secondary voltage on the primary side. The FB input has a sample and hold function that samples the FB voltage on the secondary stroke to control the output voltage. The sampled VFBS voltage is the input for the TEA1721’s control loop and defines the operating mode. TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 4 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 5.3 Operating modes The TEA1721 operates in three modes, one of which is active at the time. The three modes in order of decreasing load impedance are: • CVB: Constant Voltage with Burst mode • CV: Constant Voltage mode • CC: Constant Current mode The converter acts as a voltage source in CVB and CV modes. The converter acts as a current source in CC mode. 5.3.1 Constant Voltage with Burst mode (CVB) At low power, the TEA1721 operates in Burst mode. Burst mode operates with a VSOURCE = 100 mV, a switching frequency of 22.5 kHz and burst duty-cycle regulation by sensing the FB voltage. The TEA1721 features an energy save function that puts the main part of the analogue blocks in a sleep mode with low supply current in burst mode. The burst mode enables the energy save mode in the non-switching part of the burst. The IC switches to the nominal supply just before new burst starts. Transition from burst mode to CV mode happens at 100 % burst duty cycle: a burst completely filled with 32 pulses. This 100 % pulse train is identical to the lowest power level of the CV mode. The TEA1721 changes directly from burst mode to CV mode if the FB voltage drops below 2.4 V in burst mode. 5.3.2 Constant Voltage mode (CV) At higher power levels, the TEA1721 operates in CV mode. The output voltage is sensed by the FB pin and the control keeps the output voltage constant over the power range. CV mode starts at 22.5 kHz switching frequency and ISOURCE regulation at the VSOURCE minimum level of 100 mV. With an increasing power output, the VSOURCE level and the switching frequency are also increased. CV mode is exited when the maximum power level is reached. Maximum power occurs at ISOURCE regulation at the VSOURCE maximum level of 555 mV and a maximum switching frequency of 50.5 kHz. TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 5 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 5.3.3 Constant Current mode (CC) The CC mode starts at maximum power delivery and keeps the output current constant for decreasing output voltage. CC mode is enabled when the converter is operating at the maximum switching frequency, with the maximum primary peak current when the FB voltage drops below the regulated level. CC mode operation controlled is by regulation of the switching frequency from 50.5 kHz down to 22.5 kHz and by ISOURCE regulation from the maximum VSOURCE level of 555 mV until level of VSOURCE is 0.21 V. The VSOURCE level of 0.21 V equals the level at start-up with zero output voltage and the output capacitor discharged or on a short-circuit of the charger output. 5.4 Jitter The TEA1721 features a jitter function for ElectroMagnetic Interference (EMI) reduction. The switching frequency is 7 % typical for the spread spectrum. The sweep frequency is a low frequency of approximately 200 Hz. To keep the output power constant, the VSOURCE level is jittered with the opposite polarity. The jitter is active in all operation modes except burst mode. TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 6 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 6. Limiting values Table 3. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Tamb Conditions Min Max Unit ambient temperature -40 +85 °C Tj junction temperature -40 +150 °C Tstg storage temperature VESD electrostatic discharge voltage CDM; all pins -55 +150 °C -500 +500 V HBM; all pins, except pin 7 [1] -2000 +2000 V HBM; pin 7 [1] -1000 +1000 V Voltages VDRAIN voltage on pin DRAIN -2 +700 V VSOURCE voltage on pin SOURCE -0.3 +5 V VCC voltage on pin VCC -0.3 +35 V VFB voltage on pin FB -20 +5 V IDRAIN current on pin DRAIN -0.1 +0.7 A ISOURCE current on pin SOURCE -0.7 +0.1 A Currents [1] Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor. 7. Thermal characteristics Table 4. Thermal characteristics Symbol Parameter Conditions Min Typ Max Unit Rth(j-a) thermal resistance from junction to ambient in free air; SO7 package; on open PCB of 2.2 cm X 2.2 cm; 2-layer; 70 µm Cu - 136 - K/W in free air; SO7 package; on open PCB of 3 cm X 6 cm; 1-layer; 35 µm Cu - 136 - K/W TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 7 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 8. Characteristics Table 5. Characteristics VCC = 20 V; VFB = 0 V; Rsource = 1.5 Ω; Tj-switch = 25 °C; Tj-controller = 25 °C; all voltages referenced to GND, positive currents flow into the IC, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Supply (Pin: VCC) ICC(startup)0V start-up supply current VCC = 0 V -1.6 -1.2 -0.8 mA ICC(startup)17V start-up supply current VCC = VCC(startup) -1.6 -0.7 -0.2 mA ICC(energysave) supply current in energy save VFB = 2.8 V, non-switching 90 130 170 µA ICC(50kHz) supply current at 50 kHz in CC mode 530 750 970 µA VCC(startup) start-up supply voltage 15 17 19 V VCC(stop) stop supply voltage 7.5 8.5 9.5 V Totp overtemperature protection threshold temperature on controller die 140 150 160 °C Totp(hys) overtemperature protection temperature hysteresis - 50 - °C 3.1 3.2 3.3 V 2.5 2.55 2.6 V undervoltage lockout of IC Feedback (Pin: FB) Vth(ovp)fbck feedback overvoltage protection threshold voltage Vref(fbck) feedback reference voltage Vth(fbck)CV constant voltage mode in burst mode operation feedback threshold voltage 2.35 2.4 2.45 V Vth(det)demag(fb) demagnetization detection voltage level on FB pin 25 50 75 mV in CV ode Oscillator (Pins: DRAIN and SOURCE) fburst burst frequency burst frequency in CVB mode, without jitter 390 430 470 Hz fjit/fsw jitter frequency to switching frequency ratio in all operation modes except in CVB mode 5 7 9 % fosc-high oscillator frequency High maximum switching frequency in CV and CC mode, without jitter 48 50.5 53 kHz fosc-low oscillator frequency Low minimum switching frequency in CV and CC mode, without jitter. Switching frequency in CVB mode 21 22.5 24 kHz fsweep jitter sweep frequency In current source operation 150 200 250 Hz δmax maximum duty cycle 72 75 78 % TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 8 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W Table 5. Characteristics …continued VCC = 20 V; VFB = 0 V; Rsource = 1.5 Ω; Tj-switch = 25 °C; Tj-controller = 25 °C; all voltages referenced to GND, positive currents flow into the IC, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Power switch (Pin: DRAIN) Idrain(off) off-state drain current VDRAIN = 325 V - 1 - µA RDSon drain-source on-state resistance Tj = 25 °C; Ids = 30 mA 13 15.5 17 Ω V(BR)DS drain-source breakdown voltage 700 - - V Peak current comparator (Pin: SOURCE) tPD propagation delay time dV/dt = 0.2 V/µs - 100 - ns tleb leading edge blanking time 290 325 360 ns Vref-peak-high reference voltage, high maximum peak voltage in CV and CC peak voltage modes, without jitter 0.525 0.555 0.585 V Vref-peak-low reference voltage, low peak voltage in CVB mode 0.085 0.1 0.115 V Vref-0 V reference voltage at start-up or 0 V feedback voltage in CC mode with VFBS = 0 V 0.18 0.21 0.24 V TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 9 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 9. Package outline SO7: plastic small outline package; 7 leads; body width 3.9 mm SOT1175-1 D A E X c HE y v A Z 7 5 Q A2 A A1 A3 θ pin 1 index Lp L 1 4 detail X e w bp 0 2.5 5 mm scale Dimensions Unit mm A A1 A2 A3 bp c 0.49 0.25 max 1.75 0.250 1.45 0.175 1.35 0.25 0.40 0.20 nom 0.100 1.25 0.36 0.19 min D E 5.0 4.9 4.8 4.0 3.9 3.8 e HE 1.27 6.2 6.0 5.8 L Lp 1.05 1.0 0.7 0.4 Q v w 0.70 0.67 0.60 0.25 0.25 y Z θ 0.1 0.7 0.5 0.3 8° 4° 0° Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic interlead protrusions of 0.25 mm maximum per side are not included. References Outline version IEC JEDEC JEITA SOT1175-1 --- --- --- Fig 3. sot1175-1_po European projection Issue date 10-03-30 10-04-21 Package outline SOT1175-1 (SO7) TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 10 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 10. Revision history Table 6. Revision history Document ID Release date Data sheet status Change notice Supersedes TEA1721AT v.2.1 20120607 Product data sheet - TEA1721AT v.2 Modifications: • • Symbol td(OCP) changed to tPD in table 5 on page 8. Data sheet title changed. TEA1721AT v.2 20120507 Product data sheet - TEA1721AT v.1 TEA1721AT v.1 20120124 Preliminary data sheet - - TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 11 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 11. Legal information 11.1 Data sheet status Document status[1] [2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term 'short data sheet' is explained in section "Definitions". [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URLhttp://www.nxp.com. 11.2 Definitions Preview — The document is a preview version only. The document is still subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. Product specification — The information and data provided in a Product data sheet shall define the specification of the product as agreed between NXP Semiconductors and its customer, unless NXP Semiconductors and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the NXP Semiconductors product is deemed to offer functions and qualities beyond those described in the Product data sheet. 11.3 Disclaimers Limited warranty and liability — Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. NXP Semiconductors takes no responsibility for the content in this document if provided by an information source outside of NXP Semiconductors. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with theTerms and conditions of commercial sale of NXP Semiconductors. TEA1721AT Product data sheet Right to make changes — NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. Suitability for use — NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors and its suppliers accept no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Quick reference data — The Quick reference data is an extract of the product data given in the Limiting values and Characteristics sections of this document, and as such is not complete, exhaustive or legally binding. Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). NXP does not accept any liability in this respect. Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 12 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W Terms and conditions of commercial sale — NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published athttp://www.nxp.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NXP Semiconductors hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of NXP Semiconductors products by customer. No offer to sell or license — Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond NXP Semiconductors’ specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies NXP Semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NXP Semiconductors’ standard warranty and NXP Semiconductors’ product specifications. Translations — A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions. 11.4 Trademarks Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. Non-automotive qualified products — Unless this data sheet expressly states that this specific NXP Semiconductors product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. NXP Semiconductors accepts no liability for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. Adelante,Bitport,Bitsound,CoolFlux,CoReUse,DESFire,EZ-HV,FabKey,G reenChip,HiPerSmart,HITAG,I²C-bus logo,ICODE,I-CODE,ITEC,Labelution,MIFARE,MIFARE Plus,MIFARE Ultralight,MoReUse,QLPAK,Silicon Tuner,SiliconMAX,SmartXA,STARplug,TOPFET,TrenchMOS,TriMedia andUCODE — are trademarks of NXP B.V. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without NXP Semiconductors’ warranty of the HD Radio andHD Radio logo — are trademarks of iBiquity Digital Corporation. 12. Contact information For more information, please visit:http://www.nxp.com For sales office addresses, please send an email to:[email protected] TEA1721AT Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2.1 — 7 June 2012 © NXP B.V. 2012. All rights reserved. 13 of 14 TEA1721AT NXP Semiconductors HV start-up flyback controller with integrated MOSFET for 5 W 13. Contents 1 1.1 1.2 1.3 1.4 2 3 3.1 4 4.1 4.2 5 5.1 5.2 5.3 5.4 5.3.1 5.3.2 5.3.3 6 7 8 9 10 11 11.1 11.2 11.3 11.4 12 Product profile . . . . . . . . . . . . . . . . . . . . . . . . . . .1 General description . . . . . . . . . . . . . . . . . . . . . .1 Features and benefits . . . . . . . . . . . . . . . . . . . . .1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Quick reference data . . . . . . . . . . . . . . . . . . . . .2 Ordering information . . . . . . . . . . . . . . . . . . . . . .3 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Pinning information . . . . . . . . . . . . . . . . . . . . . . .4 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . .4 Functional description . . . . . . . . . . . . . . . . . . . .4 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Primary sensing . . . . . . . . . . . . . . . . . . . . . . . . .4 Operating modes . . . . . . . . . . . . . . . . . . . . . . . .5 Jitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Constant Voltage with Burst mode (CVB). . . . . .5 Constant Voltage mode (CV) . . . . . . . . . . . . . . .5 Constant Current mode (CC) . . . . . . . . . . . . . . .6 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . .7 Thermal characteristics . . . . . . . . . . . . . . . . . . .7 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Package outline . . . . . . . . . . . . . . . . . . . . . . . . .10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . 11 Legal information. . . . . . . . . . . . . . . . . . . . . . . .12 Data sheet status . . . . . . . . . . . . . . . . . . . . . . .12 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Contact information. . . . . . . . . . . . . . . . . . . . . .13 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2012. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] Date of release: 7 June 2012 Document identifier: TEA1721AT