Preliminary Datasheet
Off-line Primary Side Regulation Controller for Dimmable LED Driver
AP1681
Pin Configuration
M Package
(SOIC-8)
DIM
RD
RI
FB
1
2
3
4
8
7
6
5
VCC
OUT
GND
CS
Figure 2. Pin Configuration of AP1681 (Top View)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
DIM
RD
RI
FB
CS
GND
OUT
VCC
Dimming control signal input
Full brightness level setting
Full dimming level setting
Function
The feedback voltage sensing from the auxiliary winding
Primary current sensing
Ground. Current return for gate driver and control circuits of the IC
Gate driver output
Supply voltage of gate driver and control circuits of the IC
Jul. 2011
Rev. 1. 2
2
BCD Semiconductor Manufacturing Limited