NCP1562B ON Semiconductor, NCP1562B Datasheet - Page 2

• Manufacturer Part Number: NCP1562B
• Description: High Performance Active Clamp/Reset PWM Controller
• Manufacturer: ON Semiconductor

C
3 V
2 V
CSKIP
R1
R2
C
C
C
R
AUX
SS
T
T
V
V
in
ref
V
UVOV
RTCT
CSKIP
SYNC
AUX
CS
SS
V
12
10
16
4
1
in
2
6
7
I
+
−
500 mA
inhibit
I
I
SS(C)
SS(D)
V
V
V
V
REF
AUX(on)
AUX(off1)
AUX(off2)
Soft−Stop
Complete
SYNC
+
−
I
start
Oscillator
/
Detector
I
/
0.2 V = A ver.
(0.5 V = B ver.)
CSKIP(D)
I
UVOV
CSKIP(C)
DMAX
Clock
Clock
Disable
Control Logic
+
−
V
Soft−Start
Soft−Stop
REF
−
+
Enable_Output
1 V
Fixed 80 ns LEB
OUT
Control
CSKIP
Shutdown
Logic
Figure 1. Detailed Block Diagram
Thermal
Enable
STOP
V
V
Comparator
X
−
AUX(on)
+
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CSKIP
Comparator
+
Clock
−
Soft−Start
Complete
+
−
V
Ilimit
One Shot
CSKIP
Saturated
Pulse
Not
−
+
2
− +
STOP
Comparator
Clock
Comparator
Soft−Start
FF
3 V
Saturated
Comparator
Saturation
+
−
V
Comparator
Not
Central
UV
− +
S
Dominant
Reset
Latch
R
Logic
PWM
Soft−Stop
Complete
Disable_VREF
+
−
Enable_Output
+
−
P.O.R.
Q
Q
FF Reset
Bias
S
Dominant
Reset
Latch
R
+
−
0.2 V
FF Reset
+
−
V
Delay
Logic
3.6 V
X
Q
5.0 V Reference
270 kW
V
AUX
V
REF
20 kW
V
V
AUX
AUX
15
14
13
11
V
FF
8
V
t
5
9
3
GND
D
EA
REF
OUT1
PGND
OUT2
V
in
R
D
R
C
FF
FF