2

■Pin Configuration

QFN16-4x4(TOP VIEW)

4

3

2

1

16

15

14

13

12

11

10

9

8

7

6

5

QFN16-4x4(BOTTOM VIEW)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Pin no.

Pin name

1

ISET2

2

ISET1

3

EN2

4

EN1

5

AGND

6

FS

7

VIN

8

PGND1

9

CM

10

PVIN

11

CP

12

NC

13

VO

14

NC

15

PGND2

16

LED

QFN16-3x3(TOP VIEW)

QFN16-3x3(BOTTOM VIEW)

4

3

2

1

16

15

14

13

12 11 10

9

8

7

6

5

1

2

3

4

5

6

7

8

9

10 11 12

13

14

15

16

11 -

■Pin description

ISET2 : LED current setting 2

The pin that is for the connection of LED current setting resistor(Rset2) between ISET2-GND. The output

becomes 1.22V constantly when EN2 is high. The constant current of LED pin will be 3250x of the one

flows to ISET2.

(e.g.) when Rset2=6.8kΩ, Iled=1.22/6.8k×3250=583mA.

ISET1 : LED current setting 1

The pin that is for the connection of LED current setting resistor(Rset1) between ISET1-GND. The output

becomes 1.22V constantly when EN1 is high. The constant current of LED pin will be 3250x of the one

flows to ISET1.

(e.g.) when Rset1=20kΩ, Iled=1.22/20k×3250=198.3mA.

EN2 : on/off control 2

LED output current on/off control pin of set current of ISET2. This pin is pulled down to ground inside

the IC and the control logic is high active. The set current of ISET2 sinks from LED pin when this pin is

connected to VIN.