Hi, I am trying to use a L293D (essentially this one: Mini l293d motor driver expansion board internal diodes overtemperature protection Sale - Banggood.com-arrival notice-arrival notice) to switch a 36V boosted input voltage from a XTW-SY-8 (https://www.matts-electronics.com/wp-content/uploads/2018/06/XTE-SY-8.pdf).
Here's the (simplified) circuit I'm using:
Essentially creating two voltages from the 12V source: 5V via the LC78_05-0.5 to use as the logic level in the L293D and 36V via the XTW-SY-8 to drive the load.
Now when I switch on that 12V source, my pench power supply isn't able to deliver as much current as this circuit is requesting initially (>2A). If I disconnect the L293D and connect it later on, it only draws around 170mA from the 12V source. I tried to ground all the L293 inputs to avoid using the floating voltage as input as well as lowering the output voltage of the XTW-SY-8, both without success.
Is my circuit flawed? Or is there any other way to achieve the same? I only need a fast (~10-20Hz) switching high voltage (>30V) to drive a solenoid (old phone bell).