Data Sheet
AZ3842/3/4/5
Advanced Analog Circuits
CURRENT MODE PWM CONTROLLER
Typical Application
NTC
Bridge Diode
1N4007*4
C2
0.01µ
600V
R3
39k
2W
+
R2
100k
C14
100µ/400V
D3
8TQ100
L3
45µ
C11
1µ
C9
2200µ
C10
1000µ
C12
10µ
Z2
SA12A
J1
AC 220V
T
D1
+
+
Byv26e
C1 50µ
R4 100
D2
1N4148
J2
12V/5A
C3
0.1µ
Vcc
7
2
1
5
8
VCC
VREF
C6
R12
500
R5
1k
2200p/600V
C4
10n
C8
0.22µ
VFB
RT/CT
4
6
3
R8
39k/2W
C5
220p
R6
10
R16
8.2k
R15
100
COMP OUTPUT
R14
130k
Q1
IRF820
D4
Byv26e
R7
1k
GND
ISENSE
W1
1k
U3
AZ431
R18
3.9k
C7
0.01µ
U1
AZ3842/3/4/5
R10
0.51/1W
R9
R13
15k
Z1
1N5819
7.5k
R17
2k
R11
820
U2 PS521
Figure 12. Typical Application of AZ3842/3/4/5
March 2003
Rev: 1.0
9
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
