Test Procedure
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5.3.3
On Board Dyanamic Load Enable Pin (J23)
The on board dynamic load can be enabled or disabled by J23
Default setting: Jumper shorts on J23
Table 12. On Board Dynamic Load Enable/Disable selection
Jumper set to
Selection
Jumper shorts
Enable on board dynamic load
No Jumper short
Disable on board dynamic load
6
Test Procedure
6.1
Line/Load Regulation and Efficiency Measurement Procedure
6.1.1
CPU
1. Set up EVM as described in
Section 4.3
through
Section 4.6
and
Figure 4
.
2. Ensure J39 no Jumper shorts on
3. Ensure all other Jumpers configuration setting by
Section 5
before 5Vin and 12VBAT are applied.
4. Ensure Load is set to constant resistance mode and to sink 0Adc
5. Ensure S1 and S4 are in “OFF” position
6. Add scope probe on the TP30 for CPU Vcore ripple measurement
7. Ensure USB Cable is connected between host computer and USB port(J34) on the EVM
8. Increase 5Vin from 0V to 5V. Using V1 to measure 5Vin input voltage.
9. Increase 12VBAT from 0V to 12V. Using V2 to measure 12VBAT input voltage.
10. Double-Click the icon to launch the GUI program. The GUI window shown in
Figure 5
.
11. Push S4 to “ON” position to enable the VR_ON of TPS59650. VR_ON LED will light up.
12. Now the user is ready to send SVID commends. The GUI at start-up defaults:
Address: 00 CPU, Commend: SetVIDslow, Payload: 1.05V (The user can select the SVID commend by
using the pull-down menu”)
13. Click “send Commend” and CPU CPGOOD LED will light up, See the GUI window as
Figure 5
.
14. Measure V3: CPU Vcore at J7 and A1: 12VBAT input current
15. Vary CPU LOAD from 0Adc to 94Adc, CPU Vcore must remain in load line
16. Vary 12VBAT from 9V to 20V CPU Vcore must remain in line regulation
17. Push S4 to “OFF” position to disable CPU Vcore controller.
18. Decrease LOAD to 0A and disconnect the LOAD from terminal J1, J2, J3
19. Disconnect V3 from J7.
20. Disconnect scope probe from TP30
14
Using the TPS59650EVM-753 Intel™ IMVP-7 3-Phase CPU/2-Phase GPU
SLUU896 – March 2012
SVID Power System
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