AP2002
Synchronous PWM Controller
Typical Application Circuit
(1)
+5V
R1
1k
R2
10k
C1
0.1
C2
0.1
+12V
R4
10
1 VCC
GND 14
C3
0.1
C5
0.1
C6
C7
680/ 680/
16V 16V
C8
680/
16V
+
-
V
IN
5V/12V
PWRGD
OVP
R3
1k
2 PWRGD SS/SHDN 13
3 OVP
4 OCSET
5 PHASE
6 DRVH
7 PGND
SHDN
R9
270*
R8
120
R5
1.2O
R6
1.2O
L1
Q1
PFD3000 3.3uH
Q2
PFD3000 D1
Option
Vout=2.5V
+
C10
0.1
C11
680/
16V
C12
680/
16V
C13 C14
680/ 680/
16V 16V
C9
COMP 12 R7
47k 18nF
SENSE 11
BSTH 10
BSTL 9
DRVL 8
0.1u
C4
-
R10
4.7O
Note:
*Vout =Vref x (1+R9/R8)
5V & 12V dual input circuit
(2)
+5V
R1
1k
R2
10k
C1
0.1
C2
0.1
R4
10
D2
1 VCC
GND 14
2 PWRGD SS/SHDN 13
3 OVP
4 OCSET
5 PHASE
6 DRVH
7 PGND
COMP 12
SENSE 11
BSTH 10
BSTL
DRVL
9
8
C4 0.1u
R5
1.2
Ω
R6
1.2
Ω
R10
4.7
Ω
C9
Q1
L1
0.1
PFD3000 3.3uH
Q2
PFD3000
D1
Option
C3
0.1
R7
47k 18nF
SHDN
C9
C5
0.1
C6
C7
680/ 680/
16V 16V
C8
680/
16V
+
-
V
IN
5V or 12V
PWRGD
OVP
R3
1k
R9
270*
R8
120
+
C10
0.1
C11 C12
680/ 680/
16V 16V
C13
680/
16V
C14 Vout=2.5V*
680/
16V
-
Note:
* Vout=Vref x (1+R9/R8)
5V or 12V input with Bootstrapped BSTH
Anachip Corp.
www.anachip.com.tw
4/7
Rev. 0.2 Apr 14, 2004
ANACHIP [ ANACHIP CORP ]
