BTS 780
Under-Voltage-Lockout (UVLO)
When VS reaches the switch-on voltage VUV ON the IC becomes active with a hysteresis.
The High-Side output transistors are switched off if the supply voltage VS drops below
the switch off value VUV OFF.
Over-Voltage-Lockout (OVLO)
When VS reaches the switch-off voltage VOV OFF the High-Side output transistors are
switched off with a hysteresis. The IC becomes active if the supply voltage VS drops
below the switch-on value VOV ON.
Open Load Detection
Open load is detected by current measurement. If the output current drops below an
internal fixed level the error flag is set with a delay.
Status Flag
Various errors as listed in the table “Diagnosis” are detected by switching the open drain
outputs ST1 or ST2 to low.
Semiconductor Group
7
1998-02-01