Datasheet

Test Procedure

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14. Disconnect the USB cable between host Computer and EVM.

Figure 19. TPS59640EVM-751 GPU GUI Setup Window

7.1.3 VDDQ

1. Connect the LOAD to VDDQ terminal J28 and V3 at J29. Ensure correct polarity.

2. Remove jumper from J27 from pin 2 and pin 3, and put this jumper on pin 1 and pin 2 of J27 to enable

S5 of VDDQ controller. VDDQ PGOOD LED lights up.

3. Measure V3: VDDQ at J29 and A1: 12Vin input current

4. Vary VDDQ LOAD from 0 Adc to 15 Adc; VDDQ must remain in the load regulation.

5. Vary 12VBAT from 9 V to 20 V; VDDQ must remain in the line regulation.

6. Remove jumper off J27, and short back on pin 2 and pin 3 of J27 to disable VDDQ controller.

7. Decrease LOAD to 0 A, and disconnect the LOAD from terminal J28.

8. Disconnect V3 from J29.

7.1.4 VCCIO

1. Connect the LOAD to VCCIO terminal J24 and V3 at J25. Ensure correct polarity.

2. Push S1 to ON position to enable the VCCIO controller. VCCIO EN and PGOOD LEDs light up.

Using the TPS59640EVM-751 IMVP-7, 3-Phase CPU/1-Phase GPU SVID SLUU796–January 2012

Power System

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