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FP6737/A-1.6-DEC-2011

FP6737/A

85T

fitipower integrated technology lnc.

Typical Application Circuit

FP6737/A

SW

FB

GND

VIN

SHDN

OVP

L1

10µH

1µF

R1

1

2

3

6

5

4

0.22µF

LED 1

LED 2

LED 3

LED 4

D1

LED 5

LED 6

Figure 2. Typical Application Circuit of FP6737/A

Functional Pin Description

Pin Name

Pin Function

SW

Switch Pin.

Connect inductor/diode here.

Minimize trace area at this node to reduce EMI.

GND

Ground Pin.

Connect to local ground plane directly.

FB

Feedback Pin.

Connect cathode of the lowest LED and resistor here.

Calculate resistor value according to the

Shutdown Pin.

Force 1.5V or higher voltage to enable the device; force 0.4V or lower voltage to disable the

device.

OVP

Over-Voltage Protection Sensing Input Pin.

The function will be triggered when the trip point reaches 28V.

Leave it unconnected to disable this function.

VIN

Input Supply Pin.

Must be locally bypassed.