F6908

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

5 of 7

www.unisonic.com.tw

QW-R109-016.D

POWER DERATING CURE

LOCK DETECT CIRCUIT, AUTOMATIC RESTART CIRCUIT

Charge and discharge time at motor lock condition varies with the value of external capacitor at LD terminal, and

is given by the following equation.

LDC

LDCP

LDCL

ON

I

V

V

C

e

Ch

T

)

-

(

time)

arg

(

×

=

LDD

LDCP

LDCL

OFF

I

)

V

-

V

(

×

C

=

time)

e

arg

Disch

(

T

C: Capacitor at LD pin

The following value shows charge time and discharge time at C=0.47µF for reference.

Charge time =0.18S (Output: ON)

Discharge time = 1.02S (Output: OFF)