Texas Instruments TPS53819A, User Manual

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USB Interface Adapter EVM
DC
Source
VIN
Load
V1
PC
A1 V2
LM27403
PWR123 Rev. B
Figure 4-3. TPS53819AEVM-123 Recommended Test Setup
4.3.1 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 to J1 as shown in Figure 4-3 .
2. Connect a voltmeter V1 at TP1 and TP4 to measure the input voltage.
3. Connect a current meter to A1 to measure the input current.
4.3.2 Output Connections
1. Connect Load to J3 and set Load to constant resistance mode to sink 0 Adc before V
IN
is applied.
2. Connect a voltmeter V2 at TP7 and TP9 to measure the output voltage.
4.3.3 Other Connections
1. When using a fan, ensure air is flowing across the EVM.
2. Connect the ribbon cable from the USB interface adapter to J4.
4.4 List of Test Points
Table 4-1. The Functions of Each Test Points
TEST POINTS NAME DESCRIPTION
TP1 VIN Input voltage
TP2 VREG 5-V LDO output
TP3 PGOOD Power good
TP4 PGND GND reference for V
IN
TP5 DRVH High-side driver output
TP6 SW Switching node
TP7 VOUT Output voltage
TP8 DRVL Low-side driver output
TP9 PGND GND reference for VOUT
TP10 VDD Controller power-supply input
TP11 LOOPB Input B for loop injection
TP12 GND GND for sensitive analog circuitry
www.ti.com Test Setup
SLVU719B – MAY 2012 – REVISED NOVEMBER 2021
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TPS53819A Buck Controller Evaluation Module User's Guide 7
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