I'm making a circuit that involves a rotary latch mechanism. I'm going to use a 12V power supply for the latch and a 3.3V supply for the microcontroller.
The part I'm hung up on is the current draw on the rotary latch's control signal line. It says it will sink up to 25mA on the signal line when activated (granted that's at 24VDC, but it's the only datapoint they give). My original thought was to put a pull-up resistor from the signal line to 12V. Then an n-channel FET between the signal line and ground would control the latch. But if the signal line sinks even just a few mA, the pull-up resistor might drop too much voltage.
Next I thought of a push-pull circuit, but then there's the complexity of shoot-through prevention. Am I overthinking this, or is this actually a complex problem that a FET and a few passives can't solve by themselves?
Thanks!
The part I'm hung up on is the current draw on the rotary latch's control signal line. It says it will sink up to 25mA on the signal line when activated (granted that's at 24VDC, but it's the only datapoint they give). My original thought was to put a pull-up resistor from the signal line to 12V. Then an n-channel FET between the signal line and ground would control the latch. But if the signal line sinks even just a few mA, the pull-up resistor might drop too much voltage.
Next I thought of a push-pull circuit, but then there's the complexity of shoot-through prevention. Am I overthinking this, or is this actually a complex problem that a FET and a few passives can't solve by themselves?
Thanks!