www.ti.com

PIN ASSIGNMENT

PGND

VIN

EN1

D2

D1

VOUT

GND

3

1

2

7

5

6

8

12

11

10

9

15

13

14

16

EN2

4

QFN PACKAGE

(TOP VIEW)

TPS60230

SLVS516A – MAY 2004 – REVISED JUNE 2004

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

C1+

10

–

Connect to the flying capacitor C1

C1–

11

–

Connect to the flying capacitor C1

C2+

9

–

Connect to the flying capacitor C2

C2–

12

–

Connect to the flying capacitor C2

D1-D5

6-2

I

Current sink input. Connect the cathode of the white LEDs to these inputs.

Enable input. A logic high enables the converter, logic low forces the device into shutdown mode reducing the

EN1

15

I

supply current to less than 1 µA if EN2 is tied to GND.

An applied PWM signal reduces the LED current as a function of the duty cycle of the PWM signal. EN1 and EN2

can be tied together for PWM dimming between 0 mA and the maximum set with ISET. EN1 and EN2 can also be

EN2

16

I

used for digital dimming with 4 steps from 0 mA to the maximum current set with ISET. See the application section

for more details.

GND

14

–

Analog ground

ISET

1

I

Connect a resistor between this pin and GND to set the maximum current through the LEDs.

PGND

7

–

Power ground, connect with analog ground (GND)

VIN

13

I

Supply voltage input

VOUT

8

0

Connect the output capacitor and the anode of the LEDs to this pin.

Power

–

–

Connect with PGND and GND

PAD

4