A squib driver circuit for deployment of an active safety restraint in a vehicle. The squib driver circuit may include a low side protection circuit. The low side protection circuit may include a comparator circuit to compare a voltage at a low side return terminal to a reference voltage and activate a timer in response to the voltage at the low side return terminal exceeding the reference voltage, the timer generating a disable signal to disable the low side driver after a predetermined period of time. The low side protection circuit may disable the low side driver after the short is detected and elapse of the predetermined period of time. The squib driver circuit may be formed on a single chip.

A squib driver circuit for deployment of an active safety restraint in a vehicle. The squib driver circuit may include a high side protection circuit. The high side protection circuit may include a comparator circuit to compare a voltage at a high side feed terminal to a reference voltage and activate a timer in response to the voltage at the high side feed terminal exceeding the reference voltage, the timer generating a disable signal to disable the high side driver after a predetermined period of time. The high side protection circuit may disable the high side driver after the short is detected and elapse of the predetermined period of time. The squib driver circuit may be formed on a single chip.

A method and system for diagnosing a fault condition in common connected squib loops is disclosed. A current source supplies current to the feed terminal for the first squib loop and current is returned through the feed terminal for the second squib loop. The voltage is measured between the feed terminal for the first squib loop and the feed terminal for the second squib loop.

A method and system for diagnosing a fault condition in common connected squib loops is disclosed. A current source supplies current to the feed terminal for the first squib loop and current is returned through the feed terminal for the second squib loop. The voltage is measured between the feed terminal for the first squib loop and the feed terminal for the second squib loop.

A squib driver circuit for deployment of an active safety restraint in a vehicle. The squib driver circuit may include a high side protection circuit. The high side protection circuit may include a comparator circuit to compare a voltage at a high side feed terminal to a reference voltage and activate a timer in response to the voltage at the high side feed terminal exceeding the reference voltage, the timer generating a disable signal to disable the high side driver after a predetermined period of time. The high side protection circuit may disable the high side driver after the short is detected and elapse of the predetermined period of time. The squib driver circuit may be formed on a single chip.

A squib driver circuit for deployment of an active safety restraint in a vehicle. The squib driver circuit may include a low side protection circuit. The low side protection circuit may include a comparator circuit to compare a voltage at a low side return terminal to a reference voltage and activate a timer in response to the voltage at the low side return terminal exceeding the reference voltage, the timer generating a disable signal to disable the low side driver after a predetermined period of time. The low side protection circuit may disable the low side driver after the short is detected and elapse of the predetermined period of time. The squib driver circuit may be formed on a single chip.

A method for operating a trigger device for an occupant protection unit includes: activating a first switch (high side) of the trigger device for occupant protection units; activating a second switch (low side) of the trigger device for occupant protection units; detecting an output voltage at the second switch (low side); and deactivating the second switch (low side) as a function of the output voltage.

A control circuit includes: a current detection unit, where the current detection unit is configured to: when being connected to a battery, output a first type signal when detecting that the battery has an overcurrent or a short circuit; and a driver circuit, where an input terminal of the driver circuit is connected to a signal output terminal of the current detection unit, an output terminal of the driver circuit is configured to connect to a safety module in the target loop, and the driver circuit is configured to output, in response to receiving the first type signal transmitted from the current detection unit, a drive signal to drive the safety module to be disconnected, where the target loop is a loop in the battery or a loop in a device in which the battery is located.

A vehicle impact detection device includes: an amplifier configured to receive and amplify an impact signal of a vehicle; a comparative voltage circuit configured to generate a first reference signal; a first comparator configured to output a control signal indicating that a predetermined first impact detection condition or a predetermined second impact detection condition is satisfied, based on an amplified signal output by the amplifier and the first reference signal; and a driver configured to cut off an output of a battery on basis of the control signal, wherein the comparative voltage circuit is configured to reduce a magnitude of the first reference signal over time in response to detection of the amplified signal output by the amplifier.