Datasheet

TPS2052C, TPS2062C, TPS2062C-2
TPS2066C, TPS2066C-2, TPS2060C, TPS2064C
TPS2064C-2, TPS2002C, TPS2003C
SLVSAX6G –OCTOBER 2011–REVISED JANUARY 2013 www.ti.com
OVERTEMPERATURE PROTECTION
The TPS20xxC and TPS20xxC-2 dual includes per channel overtemperature protection circuitry, which activates
at 135°C (min) junction temperature while in current limit. There is an overall thermal shutdown of 155°C (min)
junction temperature when the TPS20xxC and TPS20xxC-2 dual are not in current limit. The device remains off
until the junction temperature cools 20°C and then restarts. Thermal shutdown may occur during an overload due
to the relatively large power dissipation [(V
IN
– V
OUT
) × I
OS
] driving the junction temperature up. The power switch
cycles on and off until the fault is removed. This topology allows one channel to continue normal operation even
if the other channel is in an over-temperature condition.
SOFTSTART, REVERSE BLOCKING AND DISCHARGE OUTPUT
The power MOSFET driver incorporates circuitry that controls the rise and fall times of the output voltage to limit
large current and voltage surges on the input supply, and provides built-in soft-start functionality.
The TPS20xxC and TPS20xxC-2 dual power switch will block current from OUT to IN when turned off by the
UVLO or disabled.
The TPS20xxC dual includes an output discharge function on each channel. A 470Ω (typ.) discharge resistor will
dissipate stored charge and leakage current on OUTx when the device is in UVLO or disabled. However as this
circuit is biased from IN, the output discharge will not be active when IN voltage is close to 0 V.
The TPS20xxC-2 does not have this function. The output is be controlled by an external loadings when the
device is in ULVO or disabled.
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Product Folder Links: TPS2052C TPS2062C TPS2062C-2 TPS2066C TPS2066C-2 TPS2060C TPS2064C
TPS2064C-2 TPS2002C TPS2003C