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NE5562 Datasheet(PDF) 2 Page - NXP Semiconductors

Part # NE5562
Description  Switched-mode power supply control circuit
Download  29 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

NE5562 Datasheet(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
NE/SE5562
Switched-mode power supply control circuit
1994 Aug 31
2
BLOCK DIAGRAM
FEEDFORWARD
1
11
EXTERNAL
SYNC IN
+
+
+
S
R
Q
OSC
LATCH
OSCILLATOR
3
2
OFF
ON
CLOCK
TIME
DELAY
OFF
ON
1.5V
REMOTE
ON/OFF
6
ERROR
AMP
OUT 10
FEEDBACK
VOLTAGE
8
EXTERNAL
MOD
IN
4
DUTY CYCLE
CONTROL 5
CLOCK
LOOP FAULT
COMP
0.955V
3.80V
PWM
COMP
ON/OFF
COMP
2k
OC1
0C2
0.955V
SLOW
START
COMP
OC2
NORM
– +
0.528V
OVERCURRENT 1
COMP
OVERCURRENT 2
COMP
OC CHARGE PUMPS
NORM
LV STOP
START/
STOP
LATCH
R
S
Q
0.645V
OUTPUT
LATCH
OC1
NORM
LOW BULK
BULK
SENSE
COMP
1:1
1:1
16
POWER
SUPPLY
CKTS
3.80V
SHUT
DOWN
LATCH
3.80V
OC ACCUM
COMP
TRIP
NORM
S
R
Q
+
+V
+V
OC1
OC2
AUXILIARY
COMP
HYSTERESIS
AUXILIARY
COMP
INPUT
12
ERROR
AMP
DEMAG/OV
IN
18
3.80V
DEMAG/OV
COMP
0V
NORM
OUTPUT
19
OUTPUT
INVERT
CONTROL
15
POWR
OUTPUT
NOR
CURRENT
SENSE
GND
14
20
9
0.955V
0.528V
0.645V
DELAYED
CLOCK
S
R
+
+
+
+
+
+
– +
13
3.80V
3.80V
+
– +
CDELAY
1
µA
11
µA
80
µA
VI
VZ
VS
17
Q
OC1-2
LATCHES
7
SL00389
Figure 2. Block Diagram


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