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CN1
VDD
1
VDD
2
EN
3
BRI
4
GND
5
GND
6
R5
*
A
REF
1
C20
F1
C1
C2
Q2
R1
Q1
C3
R2
REF
1
C4
R6
IC1
TL494CN
R9
C7
R12
REF
R15
R14
103
NC
C8
R8
R10
C6
R13
R14
ISEN
D2
F2
C11
R26
D1
F1
C10
R28
R29
Q8
R28
R30
C9
1
U1
1
R3
R4
2
3
Q5
C21
4
Q4
ZD3
R7
*
U1
1
C7
2
3
MMBT3904
4
Q6
R24
D?
STM8405
Q7
MMBT3906
C5
Z1
D3
R25
Q9
2
1
3
C12
R24
ISEN
R23
1
T2
8
1
7
F1
7
C16
6
3
6
R17
5
C15
C16
8
R18
7
6
R22
5
ISEN
T1
1
7
F2
C17
R19
3
6
C14
C13
R20
CN4
1
2
D4
CN5
1
2
R21
C19
A
CN3
1
2
D5
CN2
1
2
Title
Size
Number
Revision
B
Date:
15-May-2008
Sheet of
C:\Documents and Settings\Administrator.CAC63E3BBBB84BE\ 桌面 \IVA19405A3 原理图 .DDB
File:
Drawn By:
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