TPS2001D Datasheet, PDF (12/24 Pages) Texas Instruments – Current Limited, Power-Distribution Switches

TPS2001D
SLVSE25 – JULY 2017
www.ti.com
Feature Description (continued)
8.3.5 FLT
The FLT open-drain output is asserted (active low) during an overload or overtemperature condition. A 9-ms
deglitch on both the rising and falling edges avoids false reporting at start-up and during transients. A current
limit condition shorter than the deglitch period clears the internal timer upon termination. The deglitch timer does
not integrate multiple short overloads and declare a fault. This is also true for exiting from a faulted state. An
input voltage with excessive ripple and large output capacitance may interfere with operation of FLT around I_OS
as the ripple drives the device in and out of current limit.
If the TPS2001D is in current limit and the overtemperature circuit goes active, FLT goes true immediately;
however, the exiting this condition is deglitched. FLT is tripped just as the knee of the constant-current limiting is
entered. Disabling the TPS2001D clears an active FLT as soon as the switch turns off. FLT is high impedance
when the TPS2001D is disabled or in undervoltage lockout (UVLO).
8.3.6 Output Discharge
A 470-Ω (typical) output discharge dissipates stored charge and leakage current on OUT when the TPS2001D is
in UVLO or disabled. The pulldown circuit loses bias gradually as V_IN decreases, causing a rise in the discharge
resistance as V_IN falls towards 0 V. The output is be controlled by an external loadings when the device is in
ULVO or disabled.
8.4 Device Functional Modes
There are no other functional modes.
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