ncp1652 ON Semiconductor, ncp1652 Datasheet - Page 3

• Manufacturer Part Number: ncp1652
• Description: Power Factor Controllers
• Manufacturer: ON Semiconductor

AC COMP
Latch−Off
Ramp
Comp
AC IN
V
CM
CT
FB
FF
I
latch(clamp)
V
latch(clamp)
V
DD
FB
V
R
V
FF
Adj.
FB
DD
Sawtooth
Reference
Generator
Adj.
Oscillator
I
latch(shdn)
Ramp. Comp.
+
+
+
DC Max
V
Jitter
Jitter
Comparator
V
SSKIP(sync)
Transient Load Detect
SSKIP
V
SSKIP(TLD)
+
FB skip
−
+
−
comparator
+
AC In skip
−
Comparator
+
+
OVP Comparator
OTP Comparator
+
−
Ramp Comp
Clock
gm
AC error
Amplifier
V
V
Soft−skip Ramp
DC Max
latch(low)
latch(high)
Ramp Comp
+
+
−
−
Delay
Start
Terminate
t
SSKIP
Figure 2. Detailed Block Diagram
V−to−I
V−to−I
FB
+ inverter
V−to−I
TSD
+
http://onsemi.com
21.33kW
V
V
21.33kW
FB overload
comparator
OVLD
FF
Inst. current B
+
−
Inst. current A
TSD
+
Reset
3
t
Latch
V
blanking
Enable
V
BO
Overload
FF Brown−Out
Comparator
Timer
Comparator
PWM Skip
(delay)
Clock
DC Max
+
−
+
+
−
−
t
OVLD
comparator
+
PWM
4V
V
current B
CC OK
Reset
Blanking
Inst.
S
R
BO
t
LEB
Q
S
R
OVLD
Latch
Q
Out
Reset
Latch
Reset
Start
V
Enable
counter
CC(off)
Blanking
x 2
t
LEB
Management
S
R
HV current
Q
OVLD
V
V
V
DD
CC
DD
Output
Driver
Delay
Dual HV
start−up
current source
Adj.
Delay
Delay
Current sense
Output
Driver
amplifier
gm
TSD
BO
−
+
V
CC
OK
Startup
GND
OUTB
OUTA
V
I
I
R
spos
avg
CC
delay