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List of Test Points, Jumpers, and Switch
11
SLUUBN2 – March 2017
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Copyright © 2017, Texas Instruments Incorporated
TPS549B22EVM-847, 25-A Single Synchronous Step-Down Converter With
Full Differential Sense and PMBus™
8
List of Test Points, Jumpers, and Switch
Table 2
lists the test points and their descriptions.
Table 2. Test Point Functions
Item
Type
Name
Description
TP5
T-H loop
SW
Power supply Switch node
TP7
T-H loop
CH-A
Measure loop stability
TP6
T-H loop
CH-B
Measure loop stability
TP2
T-H loop
LocS+
Sense VOUT + locally across C25. Use for efficiency and ripple
measurements
TP10
T-H loop
LocS-
Sense VOUT– locally across C25. Use for efficiency and ripple
measurements
TP3
T-H loop
RemS+
Remote sense +
TP11
T-H loop
RemS-
Remote sense –
TP4
T-H loop
PVIN
Sense VIN + across C10
TP13
T-H loop
PGND
Sense VIN – across C10
TP1
T-H loop
VDD
Supplies the internal circuitry
TP17
T-H loop
ADDR
Monitor the ADDR external resistor divider ratio during initial power up.
TP15
T-H loop
VSEL
Monitor the VSEL external resistor divider ratio during initial power up.
TP9
T-H loop
BP
LDO output
TP8
T-H loop
PG
Power good
TP16
T-H loop
MODE
Monitor the MODE external resistor divider ratio during initial power up.
TP12
T-H loop
ILIM
Program over-current limit.
TP14
T-H loop
RESV_TRK
Do not connect.
TP19
T-H loop
PGND
Common GND
TP18
T-H loop
PGND
Common GND
TP20
T-H loop
PMB_CLK
Clock input for the PMBus interface.
TP21
T-H loop
PMB_DATA
Data I/O for the PMBus interface.
TP22
T-H loop
SMB_ALRT#
Alert output for the PMBus interface.
JP4
2-pin jumper
CNTL
Shunts control pin to GND
