TPS1HC100-Q1
ZHCSLK6A –JULY 2021 –REVISED DECEMBER 2021
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Conditions
表8-2. Fault Table (continued)
EN
VOUT
Latch
FLT
SNS
Behavior
Recovery
Shuts down when devices hits relative Auto retries when THYS
or absolute thermal shutdown. Typical is met and it has been
deglitch time for device to recognize
longer than tRETRY
overcurrent fault and begin to act on it amount of time
is 2.5 μs. Typical deglitch time for
device to recognize a TABS fault is 20
μs.
H
H/L
L
L
VSNSFH
STG, Relative
Thermal
Shutdown,
Shuts down when devices hits relative Stays off until latch or
or absolute thermal shutdown. Typical enable is toggled
deglitch time for device to recognize
overcurrent fault and begin to act on it
is 2.5 μs. Typical deglitch time for
Absolute Thermal
Shutdown
H
H/L
H
L
VSNSFH
device to recognize a TABS fault is 20
μs.
Normal behavior, user can judge
through SNS pin output if it is an open
load or not.
ILoad
/
H
L
x
H
H
x
x
x
x
Hi-Z
KSNS = ~0
Open load, STB
Reverse Polarity
Internal pullup resistor is active. If VBB Clears when fault goes
away
–VOUT < VOL then fault active. Typical
deglitch time before fault is indicated is
700 μs.
L
x
VSNSFH
Channel turns on to lower power
dissipation. Current into ground pin is
limited by external ground network.
x
表8-3. Deglitch Time for Each Fault Condition
Fault Condition
Deglitch Time
ILIM
TREL
2.5 µs
2.5 µs
TABS
20 µs
Open load
700 µs
8.3.4.1 Short-Circuit and Overload Protection
TPS1HC100-Q1 provides output short-circuit protection to ensure that the device prevents current flow in the
event of a low impedance path to GND, removing the risk of damage or significant supply droop. The device is
ensured to protect against short-circuit events regardless of the state of the ILIM pins and with up to 28-V supply
at 125°C.
图8-10 shows the behavior of the TPS1HC100-Q1 when the device is enabled into a short-circuit.
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