BD82000FVJ_14 Datasheet, PDF (17/27 Pages) Rohm – 1.5A Current Limit High Side Switch ICs

BD82000FVJ BD82001FVJ
(1) When the switch is turned ON while the output is in short circuit status, the switch goes into current limit status
immediately.
(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 and limit circuit operates, current limitation is
carried out.
(3) When the output current increases gradually, current limitation would not operate unless 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 operates when the switch is on (EN(/EN) signal is active).
5. Fault Flag (/OC) Output
Fault flag output is N-MOS open drain output. During detection of over-current and/or thermal shutdown, the output
level will turn low.
Over-current detection has delay filter. This delay filter prevents current detection from being sent during instantaneous
events such as inrush current at switch ON or during hot plug. If fault flag output is unused, /OC pin should be
connected to open or ground line.
V/EN
VOUT
IOUT
V/OC
Output Short Circuit
Thermal Shutdown
/OC Delay Time
Figure 40. Over-Current Detection, Thermal Shutdown Timing
(BD82000FVJ)
VEN
VOUT
IOUT
V/OC
Output Short Circuit
Thermal Shutdown
/OC Delay Time
Figure 41. Over-Current Detection, Thermal Shutdown Timing
(BD82001FVJ)
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