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User's Guide

SLUUB69A – March 2015 – Revised March 2015

Using the UCC29950EVM-631

300-W PFC/LLC Off-Line PSU Module

1

Introduction

The UCC29950EVM-631 evaluation module is a 300-W nominal, two-stage off-line converter. The EVM
consists of a Continuous Conduction Mode (CCM) PFC input stage followed by a half-bridge LLC output
and isolation stage. It provides a 12-V constant-voltage output with overload and short circuit protection.
The UCC29950 incorporates a wide range of protection features to ensure safe system operation. The
EVM may be operated without an external bias supply in Self Bias Mode, or with an external bias supply
in Aux Bias Mode.

2

Description

This evaluation module uses the UCC29950 CCM PFC and LLC Combo Controller in a 300-W converter
The input accepts a voltage range of 90 V

AC

to 265 V

AC

. It has an output voltage of 12 V and a maximum

output current of 25 A. Refer to the UCC29950 datasheet, (TI Literature Number SLUSC18), for full specs
and details about the controller features. This EVM makes use of the device features to control a two-
stage power supply that is rated for 300-W output power.

An overload timer tracks the extent and duration of overload and trips the overload protection when the
current exceeds the over-current protection profile described in the datasheet. The overload protection
turns the power stages off and then attempts restarts at 1 second intervals.

If the VCC level at the UC29950 controller falls below the UVLO threshold the controller shuts down. It will
attempt a restart when VCC recovers.

The over-temperature protection feature of the UCC29950 trips If the temperature of the device exceeds
the thermal shutdown temperature. The device restarts once the temperature falls to the restart
temperature.

The UCC29950 employs frequency dithering to reduce conducted emissions and therefore reduce the size
and cost of the EMI filter.

This user’s guide provides the schematic, component list, assembly drawing, art work and test set up
necessary to evaluate the UCC29950EVM-631.

2

Using the UCC29950EVM-631 300-W PFC/LLC Off-Line PSU Module

SLUUB69A – March 2015 – Revised March 2015

Submit Documentation Feedback

Copyright © 2015, Texas Instruments Incorporated

Содержание UCC29950EVM-631

Страница 1: ...Using the UCC29950EVM 631 User s Guide Literature Number SLUUB69A March 2015 Revised March 2015 ...

Страница 2: ...This EVM makes use of the device features to control a two stage power supply that is rated for 300 W output power An overload timer tracks the extent and duration of overload and trips the overload protection when the current exceeds the over current protection profile described in the datasheet The overload protection turns the power stages off and then attempts restarts at 1 second intervals If...

Страница 3: ...lf Bias or Aux Bias Modes CAUTION High voltage levels are present on the evaluation module whenever it is energized Proper precautions must be taken when working with the EVM The large bulk capacitor C6 and the output capacitors C17 C20 C21 C22 C23 C24 C20 and C12 must be completely discharged before the EVM can be handled Serious injury can occur if proper safety precautions are not followed 2 2 ...

Страница 4: ...IN min VIN VIN max VOUT line Line regulation 0 1 IOUT IOUT max VIN 115 VAC fLINE 60 Hz 0 1 IOUT min IOUT IOUT max VOUT load Load regulation VIN 230 VAC fLINE 50 Hz 0 1 IOUT min IOUT IOUT max VIN min VIN VIN max IOUT Output load current 0 25 A fLINE min fLINE fLINE max VIN min VIN VIN max POUT Output power 0 300 W fLINE min fLINE fLINE max VIN 115 VAC High frequency output voltage ripple fLINE 60 H...

Страница 5: ...OUT IOUT max THD Total harmonic distortion VIN 230 VAC fLINE 50 Hz 6 10 IOUT IOUT max fSW LLC LLC stage switching frequency 70 110 350 kHz VIN 115 VAC fLINE 60 Hz 88 3 IOUT IOUT max ηFL Full load efficiency VIN 230 VAC fLINE 50 Hz 90 5 IOUT IOUT max VIN 115 VAC fLINE 60 Hz 87 8 IOUT IOUT max ηAV Average efficiency VIN 230 VAC fLINE 50 Hz 90 2 IOUT IOUT max tAMB Ambient temperature 25 C 5 SLUUB69A ...

Страница 6: ...AGND 3 09Meg R39 3 09Meg R40 3 09Meg R38 100k R47 100k R54 AGND PSON TP16 TP17 TP12 TP13 TP15 VCC VCC BULK AC1 AC2 PFCCS LLC_RCS FB GD1 0 R35 TP14 PFCGD GD2 4 6 3 1 S1 4 6 3 1 S2 100pF C46 AGND R61 1 00k TP11 0 R19 GD2 2 VCC 3 SUFG 4 SUFS 5 AGND 6 MD_SEL PS_ON 7 VBULK 8 AC2 9 AC1 10 LLC_CS 11 FB 12 PFC_CS 13 GD1 14 AC_DET 15 PFC_GD 16 GND 1 U6 UCC29950D 375Vdc Schematic www ti com 4 Schematic Figu...

Страница 7: ...LK RTN 1 F μ C16 NT1 Net Tie AGND VOUT VOUT TP6 TP7 10K R33 VCC VCC VCC OUTPUT 12 VDC 25 A VOUT VOUT RTN NOMINAL VBULK 390VDC AC1 AC2 PFCCS PFCGD GD2 GD1 FB VCC LLC_RCS BULK PGND 1 00 R57 2 2 R58 L2 1 2 3 4 J3 1 2 3 J2 1 2 3 5 6 13 14 15 16 17 18 19 20 T1 TP19 TP27 TP24 TP21 TP26 TP18 TP23 TP20 TP22 TP28 1 2 3 HS1 1 2 3 HS2 1 2 3 HS3 PGND TP25 TP29 TP30 TP31 TP32 TP33 10 0M R14 1 10M R15 AGND 10μF...

Страница 8: ...acitor C6 may be monitored at J2 as shown or at TP31 pos and TP 32 neg Test Setup www ti com 5 Test Setup Figure 3 shows the test setup recommended in order to evaluate the UCC29950EVM 631 in Self Bias Mode Figure 4 shows the test setup recommended in order to evaluate the UCC29950EVM 631 in Aux Bias Mode Figure 3 UCC29950EVM 631 Recommended Self Bias Test Set Up 8 Using the UCC29950EVM 631 300 W ...

Страница 9: ...ltage on the bulk capacitor C6 may be monitored at J2 as shown or at TP31 pos and TP 32 neg www ti com Test Setup Figure 4 UCC29950EVM 631 Recommended Aux Bias Test Set Up WARNING High voltages that may cause injury exist on this evaluation module EVM Please ensure all safety procedures are followed when working on this EVM Never leave a powered EVM unattended 9 SLUUB69A March 2015 Revised March 2...

Страница 10: ... a digital voltmeter V1 directly across TP18 and TP27 with the positive terminal at TP18 and the negative terminal at TP27 A dc current meter A1 should be placed in series with the electronic load for accurate output current measurements Oscilloscope A digital or analog oscilloscope with 500 MHz scope probes is recommended Fan A fan capable of 200 LFM to 400 LFM should be used to maintain componen...

Страница 11: ...TP15 PSON MD_SEL PS_ON signal TP16 LLC_CS LLC stage current sense input signal TP17 FB LLC stage feedback signal TP18 TP18 LLC stage split capacitor TP19 VOUT EVM positive output TP20 TP20 LLC transformer output TP21 VDD VDD supply to MOSFET driver devices TP22 TP20 LLC transformer output TP23 TP23 LLC stage rectified output TP24 TP24 LLC stage low side MOSFET gate TP25 TP25 LLC stage high side MO...

Страница 12: ...atic smock and safety glasses should also be worn Because voltages in excess of 400 V may be present on the EVM do not connect the ground strap from the smock to the bench If testing with a load set the electronic load to Constant Current Mode 2 Power Up in Self Bias Mode a Connect the equipment as shown in Figure 3 b Set the electronic load to 2 A c S1 to the off position switch toggle pointed to...

Страница 13: ...tings for PFC and LLC on Aux Bias Mode and Self Bias Mode Figure 8 S1 and S2 Settings for PFC Stage On LLC Stage Off Aux Bias Mode only 13 SLUUB69A March 2015 Revised March 2015 Using the UCC29950EVM 631 300 W PFC LLC Off Line PSU Module Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Страница 14: ...ench If testing with a load set the electronic load to Constant Current Mode 2 Power Up in Aux Bias Mode a Connect the equipment as shown in Figure 4 b Set the electronic load to 2 A c Set the two switches S1 and S2 to the off position switch toggle pointed to the heatsink as shown in Figure 6 d Check that the link connects pin 1 to pin 2 of J4 e Turn on the 13 V bias supply f Set S2 to the on pos...

Страница 15: ... 2 Vary the AC source from 90 VAC to 264 VAC 3 Observe that the output voltage on DMM V1 stays within 0 1 of the output voltage regulation value 6 4 Power Factor The power meter may be used to monitor the power factor PF of the line current and the input power taken by the EVM The PF is very close to 1 0 under most operating conditions At very light loads where the EVM enters a burst mode of opera...

Страница 16: ...Set the electronic load to apply an overload load transient 25 A to 33 A to 25 A for a short period 20 ms This will not trip the over current protection Increase the time period incrementally until the OCP1 over current protection is activated The second OCP level OCP2 operates at about 42 A after 10 ms This should be observed in the same way as the OCP1 Set the load to apply an overload load tran...

Страница 17: ...by observing the voltage across the X Capacitor when the line is disconnected NOTE Turning the output off on most AC sources sets the source to 0 V It is best to use a mechanical switch or relay to disconnect the line voltage from the EVM Alternatively wire a suitably rated line socket and plug into the line cord and use that to disconnect the EVM Put a differential scope probe from TP1 to TP4 The...

Страница 18: ...ted digitally thus eliminating the need for external compensation components The Bode Plots below were taken from a typical EVM and show a loop crossover frequency of 9Hz with a phase margin of greater than 60 Figure 9 PFC Loop Gain Phase at 300 W 115 V Figure 10 PFC Loop Gain Phase at 300 W 230 V 7 2 LLC Stage Loop Stability The gain and phase characteristic of the LLC stage is dominated by the e...

Страница 19: ... a function of line voltage and current The UCC29950EVM 631 also meets the requirements of 80PLUS Silver with good margin and is close to meeting the requirements of 80PLUS Gold Table 3 UCC29950EVM 631 Typical Average Efficiency VIN V F Hz LOAD PIN W POUT W EFFICIENCY PF AVG EFF 115 60 100 345 3 300 0 86 9 0 999 88 0 75 256 7 225 0 87 6 0 999 50 168 0 150 0 89 2 0 997 25 84 95 75 0 88 3 0 990 230 ...

Страница 20: ...7 5 30 D001 90 V 115 V 230 V Performance Data and Typical Characteristic Curves www ti com 7 4 Total Harmonic Distortion Figure 14 UCC29950EVM 631 Total Harmonic Distortion as a function of line voltage and load current 7 5 Current Harmonics Figure 15 UCC29950EVM 631 Current Harmonics 230 VAC 50 Hz input full load 20 Using the UCC29950EVM 631 300 W PFC LLC Off Line PSU Module SLUUB69A March 2015 R...

Страница 21: ...035 12 04 12 045 12 05 12 055 12 06 12 065 12 07 12 075 12 08 12 085 12 09 D001 230 V 115 V www ti com Performance Data and Typical Characteristic Curves 7 6 Line Load Regulation Figure 16 Line Regulation vs Input Voltage Figure 17 Load Regulation vs Output Current 7 7 Power Factor Figure 18 Power Factor vs Input Power 21 SLUUB69A March 2015 Revised March 2015 Using the UCC29950EVM 631 300 W PFC L...

Страница 22: ...950EVM 631 Input Current 90 VAC 60 Hz full load 2 A div 115 VAC 60 Hz full load 2 A div Figure 21 UCC29950EVM 631 Input Current 230 VAC 50 Hz full load 1 A div 22 Using the UCC29950EVM 631 300 W PFC LLC Off Line PSU Module SLUUB69A March 2015 Revised March 2015 Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Страница 23: ...ple 115 VAC 60 Hz input full load 230 VAC 50 Hz input full load Figure 24 UCC29950EVM 631 Output Noise Figure 25 UCC29950EVM 631 Output Noise 115 VAC 60 Hz input full load 230 VAC 50 Hz input full load 23 SLUUB69A March 2015 Revised March 2015 Using the UCC29950EVM 631 300 W PFC LLC Off Line PSU Module Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Страница 24: ...r intervals during which no energy transfer occurs This allows the controller to maintain the correct average output voltage at the expense of an increase in output ripple Typical output ripple performance is shown in Figure 26 and Figure 27 below The burst interval and the output ripple amplitude depends on whether the EVM is operating in Aux Bias or Self Bias Mode Figure 26 VOUT No Load Aux Bias...

Страница 25: ...ure 28 DC Coupled VOUT 0 A Aux Bias Burst is Figure 29 VOUT 1 A Aux Bias Approximately 8 ms Long Burst Rep Interval is Approximately 340 ms Figure 30 VOUT 25 A Aux Bias Figure 31 VOUT 25 A Aux Bias 25 SLUUB69A March 2015 Revised March 2015 Using the UCC29950EVM 631 300 W PFC LLC Off Line PSU Module Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Страница 26: ...VAC Self Bias 390 mW 230 VAC Self Bias 660 mW 264 VAC Self Bias 745 mW 90 VAC Aux Bias 130 mW 254 mW 130 mW 384 mW 115 VAC Aux Bias 130 mW 200 mW 130 mW 330 mW 230 VAC Aux Bias 130 mW 160 mW 130 mW 290 mW 264 VAC Aux Bias 130 mW 175 mW 130 mW 305 mW 26 Using the UCC29950EVM 631 300 W PFC LLC Off Line PSU Module SLUUB69A March 2015 Revised March 2015 Submit Documentation Feedback Copyright 2015 Tex...

Страница 27: ...9950EVM 631 printed circuit board Figure 34 UCC29950EVM 631 Top Layer Assembly Drawing top view Figure 35 UCC29950EVM 631 Bottom Layer Assembly Drawing bottom view 27 SLUUB69A March 2015 Revised March 2015 Using the UCC29950EVM 631 300 W PFC LLC Off Line PSU Module Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Страница 28: ...29950EVM 631 Top Copper top view Figure 37 UCC29950EVM 631 Bottom Copper bottom view 28 Using the UCC29950EVM 631 300 W PFC LLC Off Line PSU Module SLUUB69A March 2015 Revised March 2015 Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Страница 29: ...awing and PCB Layout Figure 38 Components Assembly 29 SLUUB69A March 2015 Revised March 2015 Using the UCC29950EVM 631 300 W PFC LLC Off Line PSU Module Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Страница 30: ...mic 1 µF 35 V 10 X7R 0805 Taiyo Yuden GMK212B7105KG T Capacitor aluminum 220 µF 35 V 20 0 087 Ω 1 C26 Nippon Chemi Con EKY 350ELL221MH15D TH 1 C29 Capacitor ceramic 0 047 µF 50 V 10 X7R 0805 AVX 08055C473KAT2A 2 C33 C39 Capacitor ceramic 0 1 µF 50 V 10 X7R 0603 AVX 06035C104KAT2A 2 C34 C35 Capacitor ceramic 10 µF 35 V 10 X7R 1206 Taiyo Yuden GMK316AB7106KL 3 C36 C37 C38 Capacitor ceramic 470 pF 50...

Страница 31: ...J2 Terminal block 5 08 mm vertical 3 position th ED120 3DS Technology On Shore 1 J3 Terminal block 4 x 1 5 08 mm TH ED120 4DS Technology Header TH 100 mil 1 x 3 gold plated 230 mil above Sullins Connector 1 J4 PBC03SAAN insulator Solutions On Shore 1 J5 Terminal block 5 08mm vertical 2 position th ED120 2DS Technology 1 J6 Header shrouded 100 mil 5 x 2 gold TH TE Connectivity 5103308 1 Wurth Elekt...

Страница 32: ...Ω 1 0 1 W 0603 Vishay Dale CRCW0603100KFKEA 2 R52 R53 Resistor 470 Ω 1 0 1 W 0603 Yageo America RC0603FR 07470RL 1 R55 Resistor 2 21 kΩ 1 0 1 W 0603 Vishay Dale CRCW06032K21FKEA 1 R56 Resistor 3 32 kΩ 1 0 1 W 0603 Vishay Dale CRCW06033K32FKEA 1 R57 Resistor 1 00 Ω 1 0 125 W 0805 Panasonic ERJ 6RQF1R0V 1 R58 Resistor 2 2 Ω 5 0 125 W 0805 Vishay Dale CRCW08052R20JNEA 1 R60 Resistor 0 Ω 5 0 25 W 1206...

Страница 33: ...w Side Gate 1 U1 TI UCC27511DBV Drivers 1 U2 High Speed Low Side Gate Driver Device D0014A Texas Instruments UCC27714D14 1 U5 Precision Programmable Reference DBZ0003A Texas Instruments TL431AIDBZ Continuous Conduction Mode Power Factor Correction 1 U6 and LLC Resonant Converter Combo Controller Texas Instruments UCC29950D D0016A Single Output LDO 100 mA Adjustable 1 2 to 18 5 V Output 3 to 60 V I...

Страница 34: ...ring the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day warranty period 3 ...

Страница 35: ... by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la rég...

Страница 36: ... connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cu...

Страница 37: ...F REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Страница 38: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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