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CM6903A データシート(PDF) 2 Page - Champion Microelectronic Corp.

部品番号 CM6903A
部品情報  Low Pin Count PFC/PWM CONTROLLER COMBO
Download  14 Pages
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メーカー  CHAMP [Champion Microelectronic Corp.]
ホームページ  http://www.champion-micro.com
Logo CHAMP - Champion Microelectronic Corp.

CM6903A データシート(HTML) 2 Page - Champion Microelectronic Corp.

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CM6903A
Low Pin Count PFC/PWM CONTROLLER COMBO
2005/01/20
Champion Microelectronic Corporation
Page 2
PIN DESCRIPTION
Operating Voltage
Pin No.
Symbol
Description
Min.
Typ.
Max.
Unit
1
DC ILIMIT
PWM current limit comparator input
0
1.5
V
2
VCC
Positive supply
10
13
18
V
3
PWM OUT
PWM driver output
0
VCC
V
4
PFC OUT
PFC driver output
0
VCC
V
5
GND
Ground
6
ISENSE
Current sense input to the PFC current limit comparator
-5
0.7
V
7
VEAO
PFC transconductance voltage error amplifier output
0
6
V
8
VFB
PFC transconductance voltage error amplifier input
0
2.5
3
V
9
IAC
Feedforward input to do slope compensation and to start up
the system
0
1
V
BLOCK DIAGRAM
6
ISENSE
8
VFB
4
PFCOUT
7
VEAO
9
IAC
2
VCC
3
PWMOUT
1
DCILIMIT
5
GND
2.5V
17.9V
16.4V
0.5V
2.75V
2.5V
PWM CLK
VREF OK
VREF OK
VCC
2.45V
-1V
VFB
0.75V
1.5V
VCC
PWMCMP
-
.
-
+
UVLO
.
.
S
R
Q
Q
R
R
S
R
Q
Q
R
100K ohm
VCC OVP
+
-
.
-
-
+
.
PFC ILIMIT
+
-
.
PFC OVP
+
-
.
-
+
-
.
PFCCMP
+
-
.
VIN OK
+
-
.
+
10mS
..
.
..
400K ohm
PFCCLKB
PWMCLK
.
.
+
+
OUT
U1
SUM
.
.
.
5.1K ohm
RAMP
FAULTB
PFCCLKB
PWMCLK
fpfc= 67KHz
fpwm=67KHz
CM6903A
Tri-Fault
Detect
gmv
ISENSEAMP
OSC
R1C
R1B
R1A
VREFOK
UVLO
SS
1V


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