FAN5345S30X 查看數據表（PDF） - Fairchild Semiconductor

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FAN5345S30X

Series Boost LED Driver with Single-Wire Digital Interface

Fairchild Semiconductor 

Pin Configuration

VIN 1

GND 2

FB 3

6 SW

5 VOUT

4 EN

Figure 3. Pin Assignments Top View

Pin Definitions

Pin #

5

1

4

3

6

2

Name

VOUT

VIN

EN

FB

SW

GND

Description

Boost Output Voltage. Output of the boost regulator. Connect the LEDs to this pin. Connect COUT

(output capacitor) to GND.

Input Voltage. Connect to power source and decouple with CIN to GND.

Enable Brightness Control. Program dimming levels by driving pin with digital pulses.

Voltage Feedback. The boost regulator regulates this pin to 0.250V to control the LED string current.

Tie this pin to a current setting resistor (RSET) between GND and the cathode of the LED string.

Switching Node. Tie inductor L1 from VIN to SW pin.

Ground. Tie directly to a GND plane.

© 2011 Fairchild Semiconductor Corporation

FAN5345 • Rev. 1.0.0

3

www.fairchildsemi.com

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