1
220V
R1 10/1W
1N4007
2
Brid g e D1-D4
4
3
220V
R2
100K 1/2W
1.5M 1/4W
R3
C12
2.2uF
D5
1N4007
C8
D7
1N4148
C9
D8 SB240
C10
220uF/15V
12V/700mA
222M 400V
C10
4.7uF/15V
R5
4.7
U2
Q1
D6
1N4818
R4
400
R6
200
R10
0.8K
C12
224
C13
104
R17
89K
R12
22K
R13
R11
100
13003
R8
2K
470K
SE3901
OUT
Z
C4
10uF
Vcc
Vctrl
R15
10K
R14
1K
Vcc
3.3n
C5
C6
10uF
Vout Vsense
Ictrl
GND
GND
U3
SE1051
0.34ohm
R16
U1
Fig.2 12V/700mA Lighting 9W LED Solution Using SE3901(TO94) and SE1051.
Revision 1/20/2009
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2008. • www.seawardinc.com • Page 4