Sharp LC-46X8E/S/RU, Service Manual

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LC-46X8E/S/RU
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1.10. IC9602 (VHiMP2367DN-1Y)
1.10.1 Block Diagram
1.10.2 Pin Connections and short description
Pin No. Pin Name I/O Pin Function
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
µ
F 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.