BD2202G BD2206G
Datasheet
4. Under-Voltage Lockout (UVLO)
UVLO keeps the power switch off until VIN voltage exceeds 2.3V (Typ). On the other hand, from a power switch ON
situation, if VIN voltage drops to 2.2V (Typ), the power switch turns OFF. UVLO has a 100mV hysteresis. The
under-voltage lockout circuit is in operation when power switch is ON (when EN signal is active).
5. Thermal Shutdown
When the chip temperature increases to 160°C (Typ), the thermal shutdown circuit is triggered and the power
switch is turned OFF. When the chip temperature falls to 140°C (Typ), the power switch output returns to normal.
This operation will repeat itself until the causes of the chip temperature rise are removed or until the power switch
output is turned off. The thermal shutdown circuit is in operation when the power switch is ON (when EN signal is
active).
tBLANK2
tBLANK1
Output Current
ON
Switch Status
OFF
ON
EN Voltage
Figure 38. Over-Current Detection, Shutdown Operation (Return with EN Input)
tBLANK2
tBLANK1
Output Current
ON
Switch Status
OFF
ON
IN Voltage
VTUVL
VTUVH
Figure 39. Over-Current Detection, Shutdown Operation (Return with UVLO Operation)
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21.Aug.2014 Rev.003