HA16654 Hitachi Semiconductor, HA16654 Datasheet - Page 13

• Manufacturer Part Number: HA16654
• Description: PWM Controlled Switching Regulator
• Manufacturer: Hitachi Semiconductor

V
Primary Control Forward Converter System
Filter
R.F.I
IN
AC
HA16654A
Bias Point
10
8
6
4
2
0
Quick shutdown
area
+
8
51 k
Back up supply voltage
Soft Start Capacitor
(330 pF)
10
220 pF
Low input
malfunction prevention area
Soft start area
20
V
0.47 F
(HA16664A)
13 k
(11 k )
IN
HA16654A
R
C
(V)
1
T
30
1/R
39 k
R
R
IN
T
2
(f
Ta = 25 C
40
27 k
500 kHz)
(150 k )
Va
R
IN
V
B
HA16664A
10
+
8
6
4
2
0
HA16654A, HA16664A Series
Quick shutdown
area
D667
B647
8
10
Low input
malfunction prevention area
Back up supply voltage
Power MOS FET
Soft start area
20
V
IN
(V)
30
1/R
IN
(f
HA17431
Ta = 25 C
40
100 kHz)
V
Va
OUT
13