Description

Highlights

This driver is a high speed current mode Hit and Hold Solenoid Driver.
Two independent channels.
The circuit is a full bridge 4 quadrant drive that can reverse the voltage to effect high speed turn off and discharge of the magnetic field in the coil.
For use in applications where high speed turn on and high speed turn off are required, such as glue/ink pattern sprayers.
This driver is in stock , please call for Hit time range to be programmed prior to shipment
Current mode allows up to 10X overdrive for short periods for ultra fast turn on/turn off
Hit time settable by potentiometer. Adjustment range 0-2mS, 0-20mS, 0-200mS, 0-2S (User adjustable within factory set coarse range)
Hit Current 0-3A Settable by potentiometer.
Hold Current 0-1.5A Settable by potentiometer.
Current is fully controlled independent of supply voltage.
Ultrasonic inaudible control at >20KHz PWM frequency.
Optically isolated TTL control input

Specs

Dual independant channels
Supply voltage: 10V – 40V
Control voltage: 3V – 24V
Hit current 0-3A user adjustable by potentiometer.
Hit time range 0-2mS, 0-20mS, 0-200mS, 0-2S (User adjustable within factory set coarse range)
Hold Current 0-1.5A user adjustable by potentiometer.
Hold time: infinite
Turn off voltage: < 2V
Turn off latency +/-50uS

Applications

Suitable for high speed inkjet type glue/ink pattern sprayers etc.

Notes

Although labeled +/- TTL inputs will work with both positive or negative voltages.
Both power wires should be wired straight to the power supply, and the TTL input should be wired straight to the TTL control source PCB. Do not combine power ground and TTL ground because it will defeat the optical isolation.
Power must be turned on (and left on) at least 500 ms before any actuation of the TTL signals.
Note that the rate of rise of current (Amps/second) is equal to V/L where V is the applied voltage in Volts and L is the inductance of the solenoid in Henrys. For fast turn on chose a low L and use a high V. Note that the solenoid will not burn out due to application of a higher than rated voltage because the PWM will kick on once the programmed current is reached, so as to keep the voltage average at a level that maintains a safe current. (Hence “current mode” driver). Typically a solenoid can be driven at 4X the rated voltage to get a fast rate of rise of current.