Technical information
and start-up
BSC624-12V-B
16
3.4.5
LV – Overvoltage shut-down
The device provides the following possibilities for identifying an overvoltage at the LV side:
Rapid HW overvoltage identification (immediate shut-down of the device if voltage > 20 V)
Slow SW overvoltage identification (shut-down of the device if voltage > 16.4 V; automatic reactivation if
voltage < 16.2 V)
With a shut-down of the device, the signal
E_LV_OVERVOL
is emitted.
3.4.6
HV – Undervoltage shut-down
The device provides the following possibilities for identifying undervoltages at the HV side:
Immediate shut-down of the device if HV voltage < 215 V
This error identification is deactivated for 3 s when starting the device in the boost mode. With a shut-down of
the device, the signal
E_HV_UNDERVOL
is emitted.
3.4.7
LV – Undervoltage shut-down
The device provides the following possibilities for identifying undervoltages at the LV side:
Immediate shut-down of the device if LV voltage < 7 V
This error identification is deactivated for 5 s when starting the device in the buck mode. With a shut-down of
the device, the signal
E_LV_UNDERVOL
is emitted.
3.4.8
HV – Automatic discharge
The device has an active as well as a passive intermediate circuit discharge. The active intermediate circuit
discharge is implemented inherently via the internal HV supply and thus cannot be controlled. The passive
intermediate circuit discharge is implemented via a resistor string:
Active intermediate circuit discharge:
As soon as the device is separated from the HV supply, the internal HV circuits discharge to a value of < 50 V
within 350 ms.
Passive intermediate circuit discharge:
As soon as the device is separated from the HV, the internal HV circuits discharge to a value of < 50 V within
120 s.
