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Test Procedure

9

SNVU589 – December 2017

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Copyright © 2017, Texas Instruments Incorporated

TPS53119EVM-690 User Guide

7

Test Procedure

7.1

Line/Load Regulation and Efficiency Measurement Procedure

1. Set up EVM as described in

Section 5

and

Figure 3

.

2. Ensure that load is set to constant resistance mode and to sink 0 Adc.

3. Ensure that all jumper configuration settings per

Section 6

.

4. Ensure that the jumper provided in the EVM shorts on J3 before V

IN

is applied.

5. Increase V

IN

from 0 V to 12 V. Using V1 to measure input voltage.

6. Remove the jumper on J3 to enable the controller.

7. Use V2 to measure V

OUT

voltage.

8. Vary Load from 0-25 Adc; V

OUT

must remain in load regulation.

9. Vary Vin from 8 V to 14 V, V

OUT

must remain in line regulation.

10. Put the jumper on J3 to disable the controller.

11. Decrease load to 0 A.

12. Decrease V

IN

to 0 V.

7.2

Control Loop Gain and Phase Measurement Procedure

TPS53119EVM-690 contains a 10-

Ω

series resistor in the feedback loop for loop response analysis.

1. Set up EVM as described in

Section 5

and

Figure 3

.

2. Connect isolation transformer to test points marked TP9 and TP10.

3. Connect input signal amplitude measurement probe (channel A) to TP9. Connect output signal

amplitude measurement probe (channel B) to TP10.

4. Connect ground lead of channel A and channel B to TP11.

5. Inject approximately 40-mV or less signal through the isolation transformer.

6. Sweep the frequency from 100 Hz to 1 MHz with 10 Hz or lower post filter. The control loop gain and

phase margin can be measured.

7. Disconnect isolation transformer from bode plot test points before making other measurements. (Signal

injection into feedback may interfere with accuracy of other measurements.)

Summary of Contents for TPS53119EVM-690

Page 1: ...t Setup 7 6 Configurations 7 6 1 Switching Frequency Selection 7 6 2 Soft Start Selection 8 6 3 Mode Selection 8 6 4 Enable Selection 8 7 Test Procedure 9 7 1 Line Load Regulation and Efficiency Measu...

Page 2: ...View 17 18 TPS53119EVM 690 Top Copper Top View 18 19 TPS53119EVM 690 Layer 2 Copper Top View 18 20 TPS53119EVM 690 Layer 3 Copper Top View 19 21 TPS53119EVM 690 Layer 4 Copper Top View 19 22 TPS53119...

Page 3: ...regulated 12 V bus to produce a regulated 1 1 V output at up to 25 A of load current The TPS53119EVM 690 is designed to demonstrate the TPS53119 in a typical low voltage application while providing t...

Page 4: ...current VIN 8 V IOUT 25 A 4 A No load input current VIN 14 V IOUT 0 A with auto skip mode 1 mA OUTPUT CHARACTERISTICS Output voltage VOUT 1 1 V Output voltage regulation Line regulation VIN 8 V 14 V 0...

Page 5: ...0KHz 400KHz FCCM AUTOSKI P 1 4ms SS 5 6ms SS 0 7ms SS Note www ti com Schematic 5 SNVU589 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated TPS53119EVM 690 User...

Page 6: ...ision horizontal resolution 50 mV division vertical resolution Test points TP14 and TP15 can be used to measure the output ripple voltage by placing the oscilloscope probe tip through TP14 and holding...

Page 7: ...source current from VIN to 10 A maximum Ensure that VIN is initially set to 0 V and connected as shown in Figure 3 2 Connect a voltmeter V1 at TP7 VIN and TP8 GND to measure the input voltage 3 Connec...

Page 8: ...n The soft start time can be set by J2 Default setting 0 7 ms Table 3 Soft Start Selection JUMPER SET TO RMODE CONNECTIONS SOFT START TIME ms Top 1 2 pin shorted 39 2 k 0 7 Second 3 4 pin shorted 100...

Page 9: ...line regulation 10 Put the jumper on J3 to disable the controller 11 Decrease load to 0 A 12 Decrease VIN to 0 V 7 2 Control Loop Gain and Phase Measurement Procedure TPS53119EVM 690 contains a 10 se...

Page 10: ...O output TP2 PGOOD Power Good TP3 EN Enable pin TP4 DRVH High side driver output TP5 DRVL Low side driver output TP6 MODE Soft start and auto skip FCCM selection pin TP7 Vin VIN TP8 GND GND for VIN TP...

Page 11: ...I 8 V auto skip I 14 V forced CCM I 12 V forced CCM I 0 10 20 30 40 50 60 70 80 90 100 Efficiency www ti com Performance Data and Typical Characteristic Curves 11 SNVU589 December 2017 Submit Document...

Page 12: ...n 1 1 V 0 A 15 A Forced CCM mode CH1 1 1 Vout CH4 1 1 V Output Current Performance Data and Typical Characteristic Curves www ti com 12 SNVU589 December 2017 Submit Documentation Feedback Copyright 20...

Page 13: ...A Forced CCM mode CH1 1 1 Vout Ripple www ti com Performance Data and Typical Characteristic Curves 13 SNVU589 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporate...

Page 14: ...2 Vin 1 1 V 25 A Auto skip mode CH3 1 1 Vout CH4 PGOOD CH1 Vin CH2 EN Performance Data and Typical Characteristic Curves www ti com 14 SNVU589 December 2017 Submit Documentation Feedback Copyright 201...

Page 15: ...ti com Performance Data and Typical Characteristic Curves 15 SNVU589 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated TPS53119EVM 690 User Guide 8 7 Output 1...

Page 16: ...eristic Curves www ti com 16 SNVU589 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated TPS53119EVM 690 User Guide 8 9 Thermal Image Figure 14 Top Board at 12 VI...

Page 17: ...orporated TPS53119EVM 690 User Guide 9 EVM Assembly Drawing and PCB Layout Figure 16 through Figure 23 show the design of the TPS53119EVM 690 printed circuit board The EVM has been designed using six...

Page 18: ...www ti com 18 SNVU589 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated TPS53119EVM 690 User Guide Figure 18 TPS53119EVM 690 Top Copper Top View Figure 19 TPS5...

Page 19: ...CB Layout 19 SNVU589 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated TPS53119EVM 690 User Guide Figure 20 TPS53119EVM 690 Layer 3 Copper Top View Figure 21 TP...

Page 20: ...ti com 20 SNVU589 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated TPS53119EVM 690 User Guide Figure 22 TPS53119EVM 690 Layer 5 Copper Top View Figure 23 TPS53...

Page 21: ...32ohms 0 530 x0 510 Pulse or E E Magnetic PA0513 441NLT or 831 02990F 1 Q1 MOSFET Dual N chan Power Block 25V 40A QFN 8 Power TI CSD86350Q5D 3 R1 R3 R22 Resistor Chip 100k 1 16W 1 0603 STD STD 1 R15 R...

Page 22: ...TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD...

Page 23: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments TPS53119EVM 690...

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