LC-52X20E (serv.man5). Major IC Informations - Sharp TV Service Manual (repair manual). Page 42

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

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1

BS

I

High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET switch.
Connect a 0.01

µF or greater capacitor from SW to BS to power the high side switch.

2

IN

I

Power Input. IN supplies the power to the IC, as well as the step-down converter switches.

3

SW

Drive IN with a 4.45V to 28V power source. Bypass IN to GND with a suitably large capacitor to eliminate noise 
on the input to the IC.

4

GND

Ground.

5

FB

Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a resistive voltage divider 
from the output voltage. The feedback reference voltage is 0.8V.

6

COMP

Compensation Node. COMP is used to compensate the regulation control loop. Connect a series RC network 
from COMP to GND to compensate the regulation control loop. In same cases, an additional capacitor from 
COMP to GND is required.

7

EN

Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator, drive 
it low to turn it off.

8

SS

Soft-start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND to set the soft-
start period.