Info on H Bridge Motor Driver - G014, Motor Drive, G014-01 BI-DIR.DRIVE II (Bi Dir Drive II)
Recently into my possesion came two of these salvaged H-Bridge motor driver
circuit boards. I do not know what ratings they have, but here is what I
The circuit boards came with 22.5V, 2.1A, 28W Cont Duty DC motors.
The gate drive voltages are (based at looking at the PCB) one half of the VIN - so since the FETS have a max of 15V on the gate, I'd say the maximum input voltage is 30V. This may overheat resistors, however. It is probably designed for 20-24v.
The big transistors are MOSFETS:
Highside drivers: MTP2955 (12A, 60V, P-Channel)
Lowside drivers: MTP3055E (12A, 60V, N-Channel)
I tested it on 12V, and found the following to be true:
12V is not quite enough voltage for full current operation: The fets need 10v on the gates to turn fully on, and the gate voltage is half of power in voltage.
The little black plug is the input control.
The plug on the left in the photo above is Power In, ground on top.
The plug on the right in the phto above is Motor Out.
The Lower pin on the Control Plug (Bottom Left in photo) turns on the motor when the pin is grounded.
The upper pin on the Control Plug reverses the direction of the motor when it's turned on with the other control pin.
Both input pins are internally pulled up to the supply voltage.
The ON pin, when shorted to ground, sources 6mA.
The REV pin, when shorted to ground, sources 12mA.
I (Jesse) was in a hurry when I did this, so send error reports to jesseg (at symbol) nikola (dawt symbol) see oh em.