Texas Instruments TPS2640EVM, Руководство пользователя

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4.4 Test Procedure
Note
CH1 and CH2 can be tested one by one with a single power supply and the load.
4.4.1 Preliminary Tests
1. Turn on the power supply and set the output voltage and the current limit according to Table 4-4 .
Table 4-4. Power Supply Setting for the TPS2640EVM
EVM Channel Voltage Set Point Power Supply Current
Limit
TPS2640EVM CH1 24 V 3 A
CH2 24 V 3 A
2. Turn on the load and set the load resistance to 16 Ω ±1 Ω.
3. Disable the power supply, load and hook up the TPS2640EVM assembly as shown in
Figure 4-1 .
4. Make sure the default evaluation board jumper settings are as shown in Table 4-5 .
Table 4-5. Default Jumper Setting for the TPS2640EVM
J1 J2 J3 J4 J5 J6 J7 J15
CH1 Install Install Open 2-3 1-2 Open 2-3 Install
J8 J9 J10 J11 J12 J13 J14 J16
CH2 Install Install Open 2-3 1-2 Open 2-3 Install
5. Enable the power supply and the load.
6. Connect the negative probe of the DMM to TP7 or TP18 test points, the positive probe to the respective test
points, and verify that the voltages shown in Table 4-6 are obtained.
Table 4-6. TPS2640EVM DMM Readings at Different Test Points
Voltage Test on (CH1) Measured Voltage Reading Voltage Test on (CH2) Measured Voltage Reading
VIN1 (TP2) 24 V ±1 V DC VIN2 (TP11) 24 V ±1 V DC
VOUT1 (TP3) 24 V ±1 V DC VOUT2 (TP12) 24 V ±1 V DC
IMON1 (TP5) 2.3 V ±0.2 V DC IMON2 (TP14) 2.3 V ±0.2 V DC
FLTb1 (TP1) 22.6 V ±0.5 V DC FLTb2 (TP10) 22.6 V ±0.5 V DC
SHDNb1 (TP4) 2.7 V ±0.5 V DC SHDNb2 (TP13) 2.7 V ±0.5 V DC
7. Press the CH1/CH2 shutdown switch S1/S2 and verify the CH1/CH2 output voltage VOUT1/VOUT2 drops to
zero. Release the S1/S2 switch and verify the output voltage resumes to nominal 24 V ±1 V.
8. Disable the power supply and the load.
General Configurations www.ti.com
8 TPS2640EVM: Evaluation Module for TPS2640 SLVUBX9 – OCTOBER 2020
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