All specifications are subject to change without notice.
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TDK-Lambda
CPF1000F 280-*
Series
INSTRUCTION MANUAL
3. Block Diagram
+Vin
-Vin
CNT
SG
OC
P
In
p
u
t V
o
lt
ag
e
De
te
cto
r
OTP
OV
P
OC
P
Detec
tor
Contr
o
l Circ
ui
t
TRIM
+S
-S
PC
AUX
IOG
Control Circ
uit
Input F
ilter
-V
+V
Bias
Power Supply
ON
/O
F
F
C
o
n
tr
o
l
Switc
h
ing
Recti
fi
e
r
O
u
tput Filter
OR
in
g
FE
T
Part
Switching Frequency : 200kHz
4. Sequence Time Chart
Input Voltage
Output Voltage
*1
ON/OFF Control
IOG
H
L
L
H
0V
Vin
0V
Vout
> 100ms
RESET
OVP Set Point
OCP Set Point
In
p
u
t O
N
Co
n
tr
o
l ON
C
o
nt
ro
l O
FF
OCP
T
ri
p
O
VP T
ri
p
In
p
u
t O
FF
Inpu
t O
N
AUX
H
L
*2
C
o
nt
ro
l O
FF
C
ont
ro
l O
N
OT
P
ON
C
o
nt
ro
l O
FF
C
ont
ro
l O
N
> 100ms
RESET
LVP Trim Point
Co
n
tr
o
l ON
C
o
n
tr
o
l O
FF
> 100ms
RESET
*1
Level : 4
≦
H
≦
35(V) or Open
0
≦
L
≦
0.8(V) or Short
