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NCP1562A Datasheet, PDF (2/26 Pages) ON Semiconductor – High Performance Active Clamp/Reset PWM Controller
◁
NCP1562A, NCP1562B
1
Vin
Iinhibit
16
Istart
CAUX VAUX
+
VAUX(on)/
-- VAUX(off1)/
VAUX(off2)
Disable
-
+
+
1V
--
VAUX(on) -
+
One Shot
Pulse
Vin
R1
2
Thermal
Shutdown
R2
UVOV
UVOV
Detector
STOP
VAUX
P.O.R.
Bias
5.0 V Reference
Disable_VREF
Central
Logic
S
Dominant
Reset Q
Latch
R
VUV Soft--Stop
Complete
Enable_Output
VAUX
Vref
RT
3V
2V
CT
6
RTCT
7
SYNC
CCSKIP
12
CSKIP
4
CS
10
SS
CSS
500 mA
Oscillator
DMAX
SYNC Clock
CSKIP
Comparator
+
VREF
ICSKIP(C)
CSKIP
Control
Logic
-
+
VCSKIP
--
ICSKIP(D)
+
0.2 V = A ver.
-- (0.5 V = B ver.) OUT
Clock
Ilimit
Comparator
-
+
Clock
Fixed 80 ns LEB
Not
Saturated
-
Clock
S
Q
Dominant
Reset
Latch
R
Q
Delay
Logic
FF Reset
Saturation
Comparator
+
-
Not
+
3.6 V
--
Saturated
-
+
PWM
VX
Comparator
Soft--Start
Comparator
+
Soft--Stop
Complete
VREF
ISS(C)
Enable
Soft--Start
Soft--Stop
Control Logic
STOP
VX Soft--Start
Complete
FF
Comparator
-+
+
3V
--
+
0.2 V
--
ISS(D)
Enable_Output
FF Reset
VAUX
VREF
20 kΩ
270 kΩ
8
VREF
15
OUT1
14
PGND
13
OUT2
11
tD
RD
9
VEA
Vin
RFF
3
FF
CFF
5
GND
Figure 1. Detailed Block Diagram
http://onsemi.com
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