Datasheet

TPS40192, TPS40193
SLUS719E –MARCH 2007–REVISED MAY 2013 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DESCRIPTION (continued)
Short circuit detection is done by sensing the voltage drop across the low-side MOSFET when it is on and
comparing it with a user selected threshold of 100 mV, 200 mV or 280 mV. The threshold is set with a single
external resistor connected from COMP to GND. This resistor is sensed at startup and the selected threshold is
latched. Pulse by pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-
side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550
mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is
observed before attempting to restart. This provides limited power dissipation in the event of a sustained fault.
ORDERING INFORMATION
TAPE AND REEL
T
J
PACKAGE FREQUENCY (kHz) PART NUMBER
QUANTITY
250 TPS40193DRCT
300
3000 TPS40193DRCR
-40°C to 85°C Plastic 10-Pin SON (DRC)
250 TPS40192DRCT
600
3000 TPS40192DRCR
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