BD2061AFJ_13 Datasheet, PDF (16/25 Pages) Rohm – High Side Switch ICs

BD2061AFJ BD2065AFJ
Datasheet
3-1. When the switch is turned on while the output is in short-circuit status, the switch goes into current limit status
immediately.
3-2. When the output short-circuits or high-current load is connected while the switch is on, very large current flows until
the over current limit circuit reacts. When the current detection limit circuit works, current limitation is carried out.
3-3. When the output current increases gradually, current limitation does not work until the output current exceeds the
over current detection value. When it exceeds the detection value, current limitation is carried out.
4. Under voltage lockout (UVLO)
UVLO circuit prevents the switch from turning on until the VIN exceeds 2.3V(Typ.). If the VIN drops below 2.2V(Typ.) while
the switch turns on, then UVLO shuts off the power switch. UVLO has hysteresis of 100mV(Typ).
Under voltage lockout circuit works when the switch is on (EN,/EN signal is active).
5. Error flag (/OC) output
Error flag output is N-MOS open drain output. At detection of over current or thermal shutdown, the output level is low.
Over current detection has delay filter. This delay filter prevents instantaneous current detection such as inrush current at
switch on, hot plug from being informed to outside.
V/EN
VOUT
IOUT
V/OC
Output shortcircuit
Thermal shut down
delay
Figure 38. Over current detection, thermal shutdown timing
(BD2061FJ)
VEN
VOUT
IOUT
V/OC
Output shortcircuit
Thermal shut down
delay
Figure 39. Over current detection, thermal shutdown timing
(BD2065AFJ)
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