iW3631

Two-Stage, Flickerless™ 0-10V Dimmable Digital

Off-Line LED Driver with High PF and Low THD

Rev. 1.1

Product Summary

© 2017 Dialog Semiconductor

www.dialog-semiconductor.com

4 of 7

23-January-2017

4 Pinout Description

Figure 4.1 : 14-Lead SOIC-14 Package

iW3631

1

2

3

14

13

12

4

11

VCB

BVSENSE

DIM

5

6

7

10

9

8

ASU

VCC

PGND

AGND

Pin Number

Pin Name

Type

Pin Description

1

Analog Input

Boost inductor voltage feedback used for valley mode switching.

2

Analog Input

Rectified AC line voltage feedback. -00 uses internal resistor (15kΩ

typically) to sense line voltage; -01 needs an external resistor connected

from this pin to GND.

3

Analog Input

Boost current sense (only used for cycle-by-cycle peak current limit).

Connect an approximately 1kW resistor to the source of the boost

MOSFET switch to improve noise immunity.

4

Output

Gate drive for boost MOSFET.

5

Output

0-10V isolation transformer drive output.

6

ASU

Output

Control signal for active start-up device. This signal is pulled low after

start-up is finished to cut off the active device. If not using active start-up

device, leave this pin floating.

7

Power

Power supply for control logic and voltage sense for power-on reset

circuitry. A decoupling capacitor of 0.1μF or so should be connected

8

PGND

Ground

Power ground.

9

AGND

Ground

Signal ground.

10

Output

Gate drive for flyback MOSFET.

11

Analog Input

Primary current sense (used for cycle-by-cycle peak current control and

limit). Connect an approximately 1kW resistor to the source of the flyback

MOSFET switch to improve noise immunity.

12

Analog Input

Auxiliary voltage sense (used for primary-side regulation and valley mode

switching).

13

DIM

Analog Input

Dimming level control input.

14

Analog Input

Boost output voltage feedback. -00 uses internal resistor (15kΩ typically) to sense

line voltage; -01 needs an external resistor connected from this pin to GND.