The DRV104 is a DMOS, high-side power switch employinga pulse-width modulated (PWM) output. Its rugged design isoptimized for driving electromechanical devices such asvalves, solenoids, relays, actuators, and positioners. It is alsoideal for driving thermal devices such as heaters, coolers,and lamps. PWM operation conserves power and reducesheat rise, resulting in higher reliability. In addition, adjustablePWM allows fine control of the power delivered to the load.Time from dc-to-PWM output and oscillator frequency areexternally adjustable.Separate supply pins for the circuit and driver transistor allowthe output to operate on a different supply than the rest of thecircuit.The DRV104 can be set to provide a strong initial solenoidclosure, automatically switching to a soft hold mode forpower savings. The duty cycle can be controlled by aresistor, analog voltage, or a digital-to-analog (D/A) converterfor versatility. The Status OK Flag pin indicates when thermalshutdown or over-current occurs.The DRV104 is specified for –40°C to +85°C at its case. Theexposed lead frame must be soldered to the circuit board.
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