Texas Instruments TPS65251, User Manual, Page: 8 / 17

5.2 Jumpers
Table 5-1. Jumpers
JUMPER
NO.
FUNCTION PLACEMENT COMMENT
JP1 SYNC input
For buck internal clock fit jumper.
For external SYNC connect as per drawing.
Jumper must be fitted if no external SYNC
is used
JP2 Buck1 enable (EN1)
For automatic start-up fit jumper to V3V.
For sequencing do not fit jumper.
To disable converter fit jumper to GND.
Fit according to test requirement
JP3 Buck3 enable (EN3)
For automatic start-up fit jumper to V3V.
For sequencing do not fit jumper.
To disable converter fit jumper to GND.
Fit according to test requirement
JP4 Buck2 enable (EN2)
For automatic start-up fit jumper to V3V.
For sequencing do not fit jumper.
To disable converter fit jumper to GND.
Fit according to test requirement
JP5 LOW_P
Low power: Power save mode ON/OFF. If need
low power mode test, should connect V3V internal
regulator test point (TP29).
Fit according to test requirement. During
normal operation jumper must be fitted.
JP6 GND For normal operation fit jumper (GND)
Fit according to test requirement. During
normal operation jumper must be fitted.
5.3 Test Points and Placement
Buck converter outputs are red and have a label for easy location. Close to any of these test points there are
black ground test points to allow for DVM measurement or to use a metal exposed scope probe to reduce
common mode noise measurements. All test points are described in
Table 5-2 .
Table 5-2. Test Points and Placement
TEST
POINT
NAME SIGNAL COLOR COMMENT
TP1 GND Ground Black
TP2 GND Ground Black
TP3 AGND Ground Not fitted. Only Via.
TP4 VOUT3 Buck3 output White
TP5 VOUT1 Buck1 output White
TP8 FB3A Input for gain-phase measurement Buck3 White Normally not used
TP10 FB1A Input for gain-phase measurement Buck1 White Normally not used
TP12 VOUT2 Buck2 output White Normally not used
TP14 GND Ground Black
TP15 GND Ground Black
TP16 FB2A Input for gain-phase measurement Buck2 White Normally not used
TP27 PGOOD Power Good (open drain connected to Buck1 output) White
TP28 V7V V7V pin (internal rail) White
TP29 V3V V3V pin (internal rail) White
TP33 VIN Input supply White
Bench Test Setup Conditions www.ti.com
8 TPS65251 Buck Converter Evaluation Module User's Guide SLVU399B – AUGUST 2010 – REVISED MAY 2021
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