Texas Instruments TPS2640EVM, Руководство пользователя

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4.4.2 Output Voltage Start-Up Time Test
Follow the instructions to verify the individual channels output voltage start-up time:
1. Set up the oscilloscope as listed in Table 4-7 .
2. Set the load resistance to 16 Ω ±1 Ω and the power supply voltage to 24 V.
3. Enable the load.
4. Enable the power supply and verify that the output voltage startup waveform is as shown in
Figure 4-2 .
Table 4-7. TPS2640EVM Oscilloscope Setting for the Output Voltage Start-Up Test
Oscilloscope Setting CH1 Probe Points CH2 Probe Points
Channel 1 = 10 V / div VOUT1 (TP3) VOUT2 (TP12)
Channel 2 = 10 V / div VIN1 (TP2) VIN2 (TP11)
Channel 3 = 20 V / div FLTb1 (TP1) FLTb2 (TP10)
Channel 4 = 1 A / div Input current into T1 +Ve wire Input current into T3 +Ve wire
Trigger source = Channel 1
Trigger level = 12 V ±1 V
Trigger polarity = Rising
Trigger mode = Single
Time base 2 ms / div
Figure 4-2. Output Voltage Start-Up Waveform
www.ti.com General Configurations
SLVUBX9 – OCTOBER 2020
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TPS2640EVM: Evaluation Module for TPS2640 9
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