Texas Instruments TPS2596, User Manual, Page: 8 / 20

General Configurations
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8 SLVUBN7A – April 2019 – Revised August 2019
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TPS2596EVM: Evaluation Module for TPS2596xx
4.3.1 Test Procedure
Use the following steps to test the EVM:
1. Set the power-supply output VIN to 0 V.
2. Turn on the power supply and set the output voltage and current limit according to Table 5 .
Table 5. Power Supply Setting for TPS2596EVM
EVM Channel Voltage Set Point
Power Supply Current
Limit
TPS2596EVM
CH1(J1)
12 ± 0.2 V 3 A ± 0.25 A
CH2(J9)
3. Turn off the power supply. Hook up CH1 and CH2 of the TPS2596EVM assembly as shown in
Figure 2 .
4. The default EVM jumper setting is shown in Table 6 .
Table 6. Default Jumper Setting for TPS2596EVM
Channel Jumper Label
Default Jumper
Setting
CH1
J5 EN/UVLO 1-2
J3 OVCSEL/OVLO 1-2
J6 DVDT 5-6
J4 ILIM 3-4
CH2
J7 EN/UVLO 1-2
J12 OVCSEL/OVLO 1-2
J8 DVDT 5-6
J11 ILIM 3-4
5. CH1 and CH2 can be tested one by one for TPS2596EVM.
6. Ensure that the output load is disabled and the power supply is set properly for the design under test
(DUT). Connect the negative probe of DMM to TP10, TP11, TP13 or TP15 (GND). Turn on the power
supply, and verify that the voltages shown in
Table 7 are obtained.
Table 7. TPS2596 DMM Readings at Different Test Points
Voltage Test on (CH1) Measured Voltage Reading Voltage Test on (CH2) Measured Voltage Reading
VIN1 (TP1) 12 ± 0.5 V VIN2 (TP17) 12 ± 0.5 V
EN1 (TP3) 3.73 ± 0.3 V EN2 (TP19) 3.73 ± 0.3 V
VOUT1 (TP2) 12 ± 0.5 V VOUT2 (TP18) 12 ± 0.5 V
ILIM1 (TP5) 0 V ILIM2 (TP21) 0 V
4.3.1.1 CH1 (J1)
Use the following steps to test CH1 (J1).
1. Press the EVM RST switch, S1, and verify that the voltage at VOUT1 (TP2) starts falling slowly below
12 V. Release S1.
2. Reduce the input voltage on VIN1 and monitor VOUT1. Verify that VOUT1 (TP2) starts falling and is
fully turned off when VIN1 (TP1) reaches 3.53 V (±0.3 V).
3. Adjust the power supply voltage to 12 V.
4. Increase the input voltage on VIN1 and monitor VOUT1. Verify that VOUT1 (TP2) is clamped to V
CLAMP
when VIN1 (TP1) exceeds Output Clamp Threshold V
OVC
.
5. Adjust the power supply voltage to 12 V.
6. Turn off the power supply.