LC-46X8E. Major IC Informations - Sharp TV Service Manual (repair manual). Page 29

LC-46X8E/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.
Drive IN with a 4.75V to 28V power source. Bypass IN to GND with a suitably large capacitor to eliminate 
noise on the input to the IC.

3

SW

O

Power switching output. SW is the switching node that supplies power to the output. Connect the output LC 
filter from SW to the output load. Note that a capacitor is required from SW to BS to power the high-side 
switch.

4

GND

 —

Ground.

5

FB

I

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

I

Compensation Node. COMP is used to compensate the regulation control loop. Connect a series RC net-
work from COMP to GND to compensate the regulation control loop. In same cases, an additional capaci-
tor from COMP to GND is required.

7

EN

I

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

I

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