NE5560 Philipss, NE5560 Datasheet - Page 2

• Manufacturer Part Number: NE5560
• Description: Switched-mode power supply control circuit
• Manufacturer: Philipss

Philips Semiconductors
BLOCK DIAGRAM
1994 Aug 31
GAIN ADJUST
MODULATOR
CUTY CYCLE
Switched-mode power supply control circuit
FEEDBACK
CONTROL
CURRENT
VOLTAGE
LIMITING
NOTE:
1. See Voltage/Current fed supply characteristic curve.
INPUT
11
3
4
5
8
0.6V
0.6V
REFERENCE
+
VOLTAGE
+
–
–
+
+
–
0.48V
FORWARD
0.48V
0.6V
–
+
FEED
16
OC
GENERATOR
1
SAWTOOTH
1k
R
+
–
–
+
T
7
C
T
PULSE WIDTH
MODULATOR
8
SYNC INPUT
EXTERNAL
100
Figure 2. Block Diagram
9
REMOTE
ON/OFF
10
0.6V
2
S
R
S
R
Q
1
OVER-VOLTAGE PROTECTION
LATCH
START
STOP
V
STABILIZED
DEMAGNETIZATION
CC
1
0.6V
SUPPLY
+
Q
+
–
13
12
–
NE/SE5560
V
Product specification
CC
15
14
2
OUTPUTS
V
Z
SL00361