IR FILTER SWITCH DRIVER                      

DESCRIPTION

UTC UMD8511 is an IR filter switch driver IC designed for

switching IR filter in IR-Cut (ICR). With appropriate input controls,

UTC UMD8511 is made up of a one-channel, low saturation,

bi-directional H-bridge driver. The protection diode circuit built in

UTC UMD8511 can minimize the disturbance caused by the

feedback current when ESD impulse occurs, or when the ICR is

shut down.

The typical impedance of the current switches in UTC UMD8511

is less than 3Ohm. The current driven through the actuator is then

determined by the impedance of the ICR. For example, with 5.0V

power supply, the current through the actuator is around 300mA

with 0.73V output voltage drop.

Two types of UTC UMD8511A or UMD8511B are offered to

support single-wire control, dual-wire control and single-wire

one-shot control modes.

FEATURES

* 1.8V input driving pulse

* Low standby Current: IQSC<10uA

* 2.5V~5.5V operating voltage range

* Only one control input and Built-in non-overlap circuit to avoid the

MOSFET damage caused by the fast output voltage transient