NE5562D Philipss, NE5562D Datasheet - Page 11

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

Philips Semiconductors
1994 Aug 31
Switched-mode power supply control circuit
SAWTOOTH
Figure 16. The Duty Cycle Control Circuit, Pulse Width Modulator, and Error Amplifier, Reference, and Output Latch
+
8
35 A
+3.80V
V
+
–
REF
35 A
10
CONTROL
CYCLE
DUTY
5
Figure 15. PWM Comparator
+
–
–
PWM
SAWTOOTH
UPPER
THRESHOLD
+V
9k
Z
35 A
V
(–)
11
H
NOR
2.5k
ERROR
AMP
OUT
R
DELAYED CLOCK
(–)
OUTPUT
LATCH
10
S
100 A
MODULATOR
IN
(–)
4
TO OUTPUT
STAGE
(–)
5
NE/SE5562
DELTA
MAX
CONTROL
Product specification
PWM SIGNAL
TO OUTPUT
NOR GATE
SL00403
SL00402