© 2006 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN5617 Rev. 1.0.1

Application Diagram

4.7

μF

CAP1, CAP2

0.1

μF

1

μF

15K

VOUT

R

SET

DATA

EN

CAP2

CAP1

P1 = GND

5

6

7

8

4

3

2

1

16 15 14 13

9

10

11

12

C

IN

VIN

C

OUT

Figure 1. Typical Application

Pin Configuration

P1 = GND

4

5

16

6

15

7

14

8

13

3

2

1

9

10

11

12

RSET

N/C

N/C

LED–

CAP2–

CAP1–

CAP1+

CAP2+

Figure 2. Top View 3x3mm MLP Package

Pin Definitions

Pin

Name

Description

1

RSET

Current set resistor.

A resistor from this pin to GND sets the maximum LED current.

2,3

N/C

No internal connection.

4-6

LED–

LED cathode

drive.

7

P1, PGND

Power Ground

for the IC. Solder to PCB ground plane.

8

VOUT

Regulated Output Voltage

. Connect to output capacitor and anodes of all LEDs.

9

CAP2+

Bucket Capacitor 2

. Connect this pin to the positive terminal of the bucket capacitor

10

CAP1+

Bucket Capacitor 1

. Connect this pin to the positive terminal of the bucket capacitor

11

CAP1–

Bucket Capacitor 1

. Connect this pin to the negative terminal of the bucket capacitor

12

CAP2–

Bucket Capacitor 2

. Connect this pin to the negative terminal of the bucket capacitor

13

VIN

Supply Input Voltage

.

14

GND

Ground

. All signals are referenced to this point. Solder to PCB ground plane.

15

EN

Enable.

Enables the IC when high and disables at HIGH-to-LOW transition. The TinyWire control overrides

the state of the EN pin if a command is received.

16

DATA

DATA input

for TinyWire brightness control. This pin has a 33k