UCC28711D

Product Folder Order Now Support & Community Tools & Software Technical Documents Reference Design UCC28710, UCC28711, UCC28712, UCC28713 SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017 UCC2871x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation • • • • • • • • • • • • < 10-mW No-Load Power Primary-Side Regulation (PSR) Eliminates OptoCoupler ±5% Voltage and Current Regulation Across Line and Load 700-V Start-Up Switch 100-kHz Maximum Switching Frequency Enables High-Power Density Charger Designs Resonant Valley-Switching Operation for Highest Overall Efficiency Frequency Jitter to Ease EMI Compliance Wide VDD Range Allows Small Bias Capacitor Clamped Gate-Drive Output for MOSFET Overvoltage, Low-Line, and Overcurrent Protection Functions Programmable Cable Compensation (UCC28710) NTC Resistor Interface (UCC28711, UCC28712 and UCC28713) with Fixed Cable Compensation Options SOIC-7 Package Create a Custom Design Using the UCC28710 With the WEBENCH® Power Designer 2 Applications • • • USB-Compliant Adapters and Chargers for Consumer Electronics – Smart Phones – Tablet Computers – Cameras Standby Supply for TV and Desktop White Goods 3 Description The UCC2871x family of flyback power supply controllers provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Control algorithms in the UCC28710 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges. The controllers have a maximum switching frequency of 100 kHz and always maintain control of the peakprimary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28710 allow the cable compensation to be programmed. The UCC28711, UCC28712 and UCC28713 devices allow remote temperature sensing using a negative temperature coefficient (NTC) resistor while providing fixed cablecompensation levels. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) SOIC (7) 4.91 mm × 3.90 mm UCC28710 UCC28711 UCC28712 UCC28713 (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Application + • • 1 An internal 700-V start-up switch, dynamicallycontrolled operating states and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response. VAC VOUT – 1 Features UCC28710 VAUX VDD VS HV DRV CBC CS GND UDG-12200 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. UCC28710, UCC28711, UCC28712, UCC28713 SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Device Comparison Table..................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 3 4 7.1 7.2 7.3 7.4 7.5 7.6 4 4 4 4 5 6 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics........................................... Typical Characteristics .............................................. Detailed Description .............................................. 9 8.1 Overview ................................................................... 9 8.2 Functional Block Diagram ......................................... 9 8.3 Feature Description................................................. 10 8.4 Device Functional Modes........................................ 12 9 Application and Implementation ........................ 17 9.1 Application Information............................................ 17 9.2 Typical Application .................................................. 17 10 Power Supply Recommendations ..................... 23 11 Layout................................................................... 23 11.1 Layout Guidelines ................................................. 23 11.2 Layout Example .................................................... 25 12 Device and Documentation Support ................. 26 12.1 12.2 12.3 12.4 12.5 12.6 12.7 Device Support...................................................... Documentation Support ........................................ Receiving Notification of Documentation Updates Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 26 28 28 28 28 29 29 13 Mechanical, Packaging, and Orderable Information ........................................................... 29 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision B (July 2015) to Revision C Page • Deleted all references to the UCC28714, UCC28715, and UCC28716 devices.................................................................... 1 • Deleted quasi from quasi-resonant......................................................................................................................................... 1 • Added the Development Support, Receiving Notification of Documentation Updates, and Community Resources sections................................................................................................................................................................................. 26 Changes from Revision A (December 2014) to Revision B • Page Updated Layout Guidelines section...................................................................................................................................... 23 Changes from Original (November 2012) to Revision A • 2 Page Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1 Submit Documentation Feedback Copyright © 2012–2017, Texas Instruments Incorporated Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713 UCC28710, UCC28711, UCC28712, UCC28713 www.ti.com SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017 5 Device Comparison Table MINIMUM SWITCHING FREQUENCY PART NUMBER (1) UCC28710 Programmable cable compensation UCC28711 680 Hz UCC28712 UCC28713 (1) (2) OPTIONS (2) NTC option, 0-mV (at 5-V output) cable compensation NTC option, 150-mV (at 5-V output) cable compensation NTC option, 300-mV (at 5-V output) cable compensation See Mechanical, Packaging, and Orderable Information section for specific device ordering information. For other fixed cable compensation options, call TI. 6 Pin Configuration and Functions UCC28710 D Package 7-Pin SOIC Top View VDD 1 VS 2 CBC 3 6 GND 4 5 UCC28711, UCC28712, UCC28713 D Package 7-Pin SOIC Top View HV 7 7 HV 3 6 DRV 4 5 CS VDD 1 VS 2 DRV NTC CS GND Pin Functions PIN UCC28710 UCC28711 UCC28712 UCC28713 I/O CBC 3 — I Cable compensation is a programming pin for compensation of cable voltage drop. Cable compensation is programmed with a resistor to GND. CS 5 5 I Current sense input connects to a ground-referenced current-sense resistor in series with the power switch. The resulting voltage is used to monitor and control the peak primary current. A series resistor can be added to this pin to compensate the peak switch current levels as the AC-mains input varies. DRV 6 6 O Drive is an output used to drive the gate of an external high voltage MOSFET switching transistor. GND 4 4 — The ground pin is both the reference pin for the controller and the low-side return for the drive output. Special care should be taken to return all AC decoupling capacitors as close as possible to this pin and avoid any common trace length with analog signal return paths. HV 7 7 I The high-voltage pin connects directly to the rectified bulk voltage and provides charge to the VDD capacitor for start-up of the power supply. NTC — 3 I NTC an interface to an external negative temperature coefficient resistor for remote temperature sensing. Pulling this pin low shuts down PWM action. VDD 1 1 I VDD is the bias supply input pin to the controller. A carefully-placed bypass capacitor to GND is required on this pin. VS 2 2 I Voltage sense is an input used to provide voltage and timing feedback to the controller. This pin is connected to a voltage divider between an auxiliary winding and GND. The value of the upper resistor of this divider is used to program the AC-mains run and stop thresholds and line compensation at the CS pin. NAME DESCRIPTION Copyright © 2012–2017, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713 3 UCC28710, UCC28711, UCC28712, UCC28713 SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017 www.ti.com 7 Specifications 7.1 Absolute Maximum Ratings (1) See . MAX UNIT VHV Start-up pin voltage, HV MIN 700 V VVDD Bias supply voltage, VDD 38 V IDRV Continuous gate current sink 50 mA IDRV Continuous gate current source Self-limiting mA IVS Peak current, VS VDRV Gate drive voltage at DRV Voltage TJ −1.2 mA −0.5 Self-limiting V VS −0.75 7 V CS, CBC, NTC −0.5 5 V −55 150 °C 260 °C 150 °C Operating junction temperature Lead temperature 0.6 mm from case for 10 s Tstg (1) −65 Storage temperature Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltages are with respect to GND. Currents are positive into, negative out of the specified terminal. These ratings apply over the operating ambient temperature ranges unless otherwise noted. 7.2 ESD Ratings VALUE Electrostatic discharge V(ESD) (1) (2) Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) ±2000 Charged-device model (CDM), per JEDEC specification JESD22-C101 (2) ±500 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. . 7.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) MIN VDD Bias supply operating voltage CVDD VDD bypass capacitor RCBC Cable-compensation resistance IVS VS pin current TJ Operating junction temperature NOM MAX UNIT 9 35 V 0.047 1 µF 10 kΩ −1 mA −40 125 °C 7.4 Thermal Information UCC2871x THERMAL METRIC (1) D (SOIC) UNIT 7 PINS RθJA Junction-to-ambient thermal resistance 141.5 °C/W RθJC(top) Junction-to-case (top) thermal resistance 73.8 °C/W RθJB Junction-to-board thermal resistance 89 °C/W ψJT Junction-to-top characterization parameter 23.5 °C/W ψJB Junction-to-board characterization parameter 88.2 °C/W (1) 4 For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. Submit Documentation Feedback Copyright © 2012–2017, Texas Instruments Incorporated Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713 UCC28710, UCC28711, UCC28712, UCC28713 www.ti.com SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017 7.5 Electrical Characteristics over operating free-air temperature range, VVDD = 25 V, HV = open, RCBC(NTC) = open, TA = –40 °C to 125 °C, TA = TJ (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 100 250 500 µA 0.1 1 µA HIGH-VOLTAGE START UP IHV Start-up current out of VDD VHV = 100 V, VVDD = 0 V, start state IHVLKG Leakage current at HV VHV = 400 V, run state BIAS SUPPLY INPUT IRUN Supply current, run IDRV = 0, run state 2 2.65 mA IWAIT Supply current, wait IDRV = 0, wait state 95 120 µA ISTART Supply current, start IDRV = 0, VVDD = 18 V, start state, IHV = 0 18 30 µA IFAULT Supply current, fault IDRV = 0, fault state 95 125 µA UNDERVOLTAGE LOCKOUT VVDD(on) VDD turnon threshold VVDD low to high 19 21 23 V VVDD(off) VDD turnoff threshold VVDD high to low 7.7 8.1 8.5 V VVSR Regulating level Measured at no-load condition, TJ = 25 °C (1) 4.01 4.05 4.09 V VVSNC Negative clamp level IVS = –300 µA, volts below ground 190 250 325 mV IVSB Input bias current VVS = 4 V –0.25 0 0.25 µA VS INPUT CS INPUT VCST(max) Maximum CS threshold voltage VVS = 3.7 V 738 780 810 mV VCST(min) Minimum CS threshold voltage VVS = 4.35 V 175 195 215 mV KAM AM control ratio VCST(max) / VCST(min) 3.6 4 4.4 V/V VCCR Constant current regulating level CC regulation constant 318 330 343 mV KLC Line compensation current ratio IVSLS = –300 µA, IVSLS / current out of CS pin 24 25 28.6 A/A TCSLEB Leading-edge blanking time DRV output duration, VCS = 1 V 180 235 280 ns IDRS DRV source current VDRV = 8 V, VVDD = 9 V 20 25 RDRVLS DRV low-side drive resistance IDRV = 10 mA VDRCL DRV clamp voltage VVDD = 35 V RDRVSS DRV pulldown in start state DRIVERS (1) 6 150 mA 12 Ω 14 16 V 190 230 kΩ The regulating level at VS decreases with temperature by 0.8 mV/˚C. This compensation is included to reduce the power supply output voltage variance over temperature. Copyright © 2012–2017, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713 5 UCC28710, UCC28711, UCC28712, UCC28713 SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017 www.ti.com Electrical Characteristics (continued) over operating free-air temperature range, VVDD = 25 V, HV = open, RCBC(NTC) = open, TA = –40 °C to 125 °C, TA = TJ (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 92 100 106 kHz 600 680 755 Hz 1.8 2.1 2.55 µs V TIMING fSW(max) Maximum switching frequency fSW(min) Minimum switching frequency tZTO Zero-crossing timeout delay VVS = 3.7 V UCC28710 UCC28711 UCC28712 UCC28713 VVS = 4.35 V PROTECTION VOVP Overvoltage threshold At VS input, TJ = 25 °C (1) 4.55 4.6 4.71 VOCP Overcurrent threshold At CS input 1.4 1.5 1.6 V IVSL(run) VS line-sense run current Current out of VS pin increasing 190 225 275 µA IVSL(stop) VS line-sense stop current Current out of VS pin decreasing KVSL VS line sense ratio IVSL(run) / IVSL(stop) TJ(stop) Thermal shut-down temperature Internal junction temperature 70 80 100 µA 2.45 2.8 3.05 A/A 165 °C CABLE COMPENSATION VCBC(max) Cable compensation maximum voltage Voltage at CBC at full load UCC28710 2.9 3.2 3.5 V VCVS(min) Compensation at VS VCBC = open, change in VS regulating level at full load UCC28710 –55 –15 25 mV VCVS(max) Maximum compensation at VS VCBC = 0 V, change in VS regulating UCC28710 level at full load 275 320 375 mV UCC28711 –55 –15 25 VCVS Change in VS regulating level at full load Compensation at VS UCC28712 103 UCC28713 206 mV NTC INPUT VNTCTH NTC shut-down threshold Fault UVLO cycle when below this threshold UCC28711 UCC28712 UCC28713 0.9 0.95 1 V INTC NTC pullup current Current out of pin UCC28711 UCC28712 UCC28713 90 105 125 µA 7.6 Typical Characteristics VDD = 25 V, unless otherwise noted. 10 10 IRUN, VDD = 25V Run State 1 IVDD - Bias Supply Current (mA) IVDD - Bias Supply Current (mA) 1 Wait State 0.1 /\ \/ VDD Turn-Off VDD Turn-On 0.01 Start State IWAIT, VDD = 25V 0.1 ISTART, VDD = 18V 0.01 0.001 0.001 0.0001 0.0001 0 5 10 15 20 25 30 35 -50 -25 0 25 Submit Documentation Feedback 75 100 125 C002 C001 Figure 1. Bias Supply Current vs. Bias Supply Voltage 6 50 TJ - Temperature (oC) VDD - Bias Supply Voltage (V) Figure 2. Bias Supply Current vs. Temperature Copyright © 2012–2017, Texas Instruments Incorporated Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713 UCC28710, UCC28711, UCC28712, UCC28713 www.ti.com SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017 Typical Characteristics (continued) VDD = 25 V, unless otherwise noted. 4.12 300 4.1 IVSLRUN VS Line Sense Current ( A) VVSR - VS Regulation Voltage (V) 250 4.08 4.06 4.04 4.02 4 200 150 100 IVSLSTOP 3.98 50 3.96 3.94 0 -50 -25 0 25 50 TJ - Temperature 75 100 125 -50 -25 0 (oC) 25 50 75 100 C003 Figure 3. VS Regulation Voltage vs. Temperature C004 Figure 4. VS Line Sense Current vs. Temperature 210 350 205 345 VCCR - Constant Current Regulating Level (mV) VCST(min) - Minimum CS Threshold Voltage (mV) 125 TJ - Temperature (oC) 200 195 190 185 180 175 170 340 335 330 325 320 315 310 -50 -25 0 25 50 TJ - Temperature 75 100 125 -50 -25 0 (oC) 25 50 75 100 125 TJ - Temperature (oC) C005 Figure 5. Minimum CS Threshold vs. Temperature C006 Figure 6. Constant Current Regulating Level vs. Temperature 775 34 VDRV = 8 V, VVDD = 9 V 32 725 IDRS - DRV Source Current (mA) fSW(min) - Minimum Switching Frequency (Hz) 750 700 675 650 625 30 28 26 24 600 22 575 550 20 -50 -25 0 25 50 75 100 125 -50 TJ - Temperature (oC) -25 0 25 50 75 C007 125 C008 VDRV = 8 V Figure 7. Minimum Switching Frequency vs. Temperature Copyright © 2012–2017, Texas Instruments Incorporated 100 TJ - Temperature (oC) VVDD = 9 V Figure 8. DRV Source Current vs. Temperature Submit Documentation Feedback Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713 7 UCC28710, UCC28711, UCC28712, UCC28713 SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017 www.ti.com Typical Characteristics (continued) VDD = 25 V, unless otherwise noted. 120 115 0.98 INTC - NTC Pull-Up Current ( A) VNTCTH - NTC Shutdown Threshold Voltage (V) 1.00 0.96 0.94 0.92 110 105 100 95 0.90 90 -50 -25 0 25 50 TJ - Temperature 75 100 125 -50 -25 0 (oC) 25 50 75 100 C009 C010 Figure 10. NTC Pull-Up Current vs. Temperature 4.68 320 4.66 280 4.64 240 IHV - HV Start-Up Current ( A) VOVP - VS Over-Voltage Threshold (V) Figure 9. NTC Shutdown Threshold Voltage vs. Temperature 4.62 4.60 4.58 4.56 4.54 200 160 120 80 40 4.52 0 -50 -25 0 25 50 TJ - Temperature 75 100 125 (oC) -50 -25 0 25 Figure 11. VS Overvoltage Threshold vs. Temperature Submit Documentation Feedback 50 75 100 125 TJ - Temperature (oC) C011 8 125 TJ - Temperature (oC) C012 Figure 12. HV Start-Up Current vs. Temperature Copyright © 2012–2017, Texas Instruments Incorporated Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713 UCC28710, UCC28711, UCC28712, UCC28713 www.ti.com SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017 8 Detailed Description 8.1 Overview The UCC2871x family is a flyback power supply controller which provides accurate voltage and constant current regulation with primary-side feedback, eliminating the need for opto-coupler feedback circuits. The controller operates in discontinuous conduction mode with valley-switching to minimize switching losses. The modulation scheme is a combination of frequency and primary peak current modulation to provide high conversion efficiency across the load range. The control law provides a wide-dynamic operating range of output power which allows the power designer to achieve the