NE5562D Philipss, NE5562D Datasheet - Page 28

• Manufacturer Part Number: NE5562D
• Description: Switched-mode power supply control circuit
• Manufacturer: Philipss

Philips Semiconductors
1994 Aug 31
Switched-mode power supply control circuit
NOTE:
400kHz operation with feed-forward line regulation and cycle-by-cycle current timing.
V
R
R
0’
1
2
+5V
SENSE
+3.80V
0.22 F
3.8V
2N3906
C
I
S
T
C
’
Figure 48. Negative Output Regulator Using Current Mirror
SS
570pF
100
R
220k
0V–
3.5V
+5
I
2N3906
5.1k
R
6.8k
T
Figure 47. NE5562 Flyback Converter
+7.50V
R
R
V
F
F
Z
(10)
(8)
33k
(9)
SYNC
10
100
EXT
1
2
3
4
5
6
7
8
9
FEED-
FORWARD
NE5562
+
–
ERROR
AMP
20
19
18
17
16
15
14
13
12
11
(20)
(17)
48V +V
28
+12V
O.C.
HYST.
S
SUPPLY
SENSE
CERAMIC
C
RESET
LOW
(19)
DELAY
0.1 F
4.7
R
S
100pF
1k
+V
BUZ41A
S
I
S
R
T
SH
++V
–V
OUT
COM
COM
–12
+5V
+12
NE/SE5562
Product specification
SL00434
SL00435