AP1690

Document number: DS36469 Rev. 2 - 2

2 of 9

www.diodes.com

May 2014

© Diodes Incorporated

AP1690

A Product Line of

Diodes Incorporated

VCC

DIM

PD

GND

CS

OUT

FB

L

N

LED+

LED -

R1

C1

ZD1

BD1

D1

L1

R2

C2

R3

C3

C4

R4

R5

R6

C5

D2

D3

R7

C6

R8

R9

R10

R11

C7

R12

R13

R14

R15

R16

R17

C8

C9

D4

D5

R18

R19

R20

Q1

D6

C10

R21

CY1

T1

Q2

+

3

2

6

4

7

5

8

Isolated

Pin Descriptions

Pin Number

Pin Name

Function

1

NC

No connection

2

PD

The rectified input voltage sensing pin. The pin is detecting the phase of dimmer

3

DIM

The rectified input voltage sensing pin. The pin is detecting the average AC input voltage

4

CS

Primary current sensing

5

FB

This pin captures the feedback voltage from the auxiliary winding. FB voltage is used to control no

load output voltage and determine acceleration stop point at start-up phase

6

GND

Ground. Current return for gate driver and control circuits of the IC

7

OUT

Gate driver output

8

VCC

Supply voltage of gate driver and control circuits of the IC