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Thermal
Sense
Driver
Current
Limit
UVLO
CS
Driver
Current
Limit
CS
Thermal
Sense
GND
EN1
IN1
EN2
OC1
OUT1
OUT2
OC2
Deglitch
Deglitch
Driver
Current
Limit
CS
Thermal
Sense
Charge
Pump
GND
IN2
EN3
OUT3
OC3
Deglitch
VCC
Selector
UVLO
(SeeNote A)
(SeeNote A)
(SeeNote A)
TPS2045B , TPS2055B
TPS2046B , TPS2047B
SLVS532C – JULY 2004 – REVISED OCTOBER 2007
Terminal Functions (TPS2047B)
TERMINAL
I/O DESCRIPTION
NAME NUMBER
EN1 3 I Enable input, logic low turns on power switch IN1-OUT1
EN2 4 I Enable input, logic low turns on power switch IN1-OUT2
EN3 7 I Enable input, logic low turns on power switch IN2-OUT3
GND 1, 5 Ground
IN1 2 I Input voltage for OUT1 and OUT2
IN2 6 I Input voltage for OUT3
NC 8, 9, 10 No connection
OC1 16 O Overcurrent, open-drain output, active low, IN1-OUT1
OC2 13 O Overcurrent, open-drain output, active low, IN1-OUT2
OC3 12 O Overcurrent, open-drain output, active low, IN2-OUT3
OUT1 15 O Power-switch output, IN1-OUT1
OUT2 14 O Power-switch output, IN1-OUT2
OUT3 11 O Power-switch output, IN2-OUT3
FUNCTIONAL BLOCK DIAGRAM (TPS2047B)
A. Current sense
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Product Folder Link(s): TPS2045B TPS2055B TPS2046B TPS2047B