UH477

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

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www.unisonic.com.tw

QW-R109-028.b



APPLICATION CIRCUIT

The Example of Typical Application Circuit

A typical application circuit is shown as follows. The red, yellow, and black wires are the input points of the

pull-up resistance for the use of measuring FG signal.

C

ON

C

C

I

V

V

R





For example:

There is a reverse protection diode D1 in the circuit. As if the red and black wires reversely connect with the

power source, the current flows through the ground via IC and coils L1 and L2 to power supply. Under such kind of

circumstances the IC and coils are easy to be burned out. From that, this reverse protection diode is necessary in

the design. Meanwhile, an extra voltage drop on the supply voltage should be taken into consideration, which is

caused by the reverse protection diode.

The capacitor C1 is designed to reduce the ripple noise during the transient of the output stages, and its value

is determined by the coil impedance and characteristics.

R wire

B wire

Y wire

C1

NO

SO

UH477

GND

D1

L1