Texas Instruments TPS40400, Руководство пользователя

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5.4 USB Interface Adapter and Cable
Proper connection and polarity for USB interface adapter and cable.
Figure 5-3. TPS40400EVM-351 USB-To-GPIO Interface Adapter
5.4.1 Input Connections
1. Prior to connecting the DC input source V
IN
, it is advisable to limit the source current from V
IN
to 10 A
maximum. Make sure V
IN
is initially set to 0 V and connected as shown in Figure 5-2 .
2. Connect a voltmeter DMM 1 at TP1 (V
IN
) and TP3 (GND) to measure the input voltage.
3. Connect a voltmeter DMM 2 across shunt to measure the input current.
5.4.2 Output Connections
1. Connect Load between J3 and J4; and set Load to constant-resistance mode to sink 0 A
DC
before V
IN
is
applied.
2. Connect a voltmeter DMM 3 at TP5 (V
OUT
) and TP17 (GND) to measure the output voltage.
3. Connect a voltmeter DMM 4 across shunt to measure the output current.
www.ti.com Test Setup
SLUU535A – SEPTEMBER 2011 – REVISED JANUARY 2022
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TPS40400 Buck Controller Evaluation Module User's Guide 9
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