ISL6115EVAL1【PDF 23/26 页】EVALUATION BOARD 12V ISL6115

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Technical Brief 457

Summary of Overcurrent Response

HIP1012A - If programmed OC setpoint is exceeded, gate is

modulated to regulate current to current regulation level until

programmed timeout occurs. If timeout occurs, both gates

latch off. If the load current exceeds 300% of the

programmed OC setpoint, affected gate is immediately

pulled to ground, then modulated to regulate current to

current regulation level until timeout occurs.

HIP1013 - If OC setpoint is exceeded, both gates will latch

off ~2μs after OC event

HIP1011, A, B, D, E - If programmed OC setpoint is

exceeded, all outputs latch off.

ISL6115, ISL6116, ISL6117, ISL6120 - If programmed OC

setpoint is exceeded, gate is modulated to regulate current

to current regulation level until programmed timeout occurs.

If timeout occurs, the gate latches off. If the overcurrent

voltage threshold is exceeded by more than 150mV, the

affected gate is immediately pulled to ground, then

modulated to regulate current to current regulation level until

timeout occurs.

ISL6118, ISL619, ISL6121 - If OC setpoint is exceeded,

current is regulated then the gate latches off ~12ms after OC

event.

ISL6111 - If programmed OC setpoint is exceeded, gate is

modulated to regulate current to current regulation level until

programmed timeout occurs. If timeout occurs, all four

gates latch off.

HIP1020 - This device does not provide current monitoring.

ISL6140, ISL6150 - If programmed OC setpoint is exceeded

for more than 2μs, gate will latch off.

ISL6173 - Two levels of overcurrent detection are present,

CR mode and WOC (Way Overcurrent) mode. If load

current reaches OC setpoint, the gate is modulated to

regulate current to current regulation level until current drops

below CR or programmed timeout occurs. If timeout occurs,

output will either latch off or indefinitely retry depending on

condition of RTR/LTCH pin. WOC mode is reached upon a

very high di/dt spike of >300% CR. Gate is pulled to GND

immediately, then the device enters CR mode.

23

ISL6141/51 - If programmed OC setpoint is exceeded, gate

is modulated to regulate current to current regulation level

until 500μs timeout occurs. If the overcurrent voltage

threshold is exceeded by more than 150mV, the affected

gate is immediately pulled to ground, then modulated to

regulate current to current regulation level until 500μs

timeout occurs. If timeout occurs, the gate latches off.

ISL6142/52 - If programmed OC setpoint is exceeded, gate

is modulated to regulate current to current regulation level

until programmed timeout occurs. If the overcurrent voltage

threshold is exceeded by more than 150mV, the affected

gate is immediately pulled to ground, then modulated to

regulate current to current regulation level until programmed

timeout occurs. If timeout occurs, the gate latches off.

ISL6161 - If programmed OC setpoint is exceeded, gate is

modulated to regulate current to current regulation level until

programmed timeout occurs. If timeout occurs, both gates

latch off. If the load current exceeds 300% of the

programmed OC setpoint, affected gate is immediately

pulled to ground, then modulated to regulate current to

current regulation level until timeout occurs.

TB457.0

April 18, 2006

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