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CM6903 Folha de dados(PDF) 2 Page - Champion Microelectronic Corp.

Nome de Peças CM6903
Descrição Electrónicos  Low Pin Count PFC/PWM Controller Combo
PDF  14 Pages
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Fabricante Electrônico  CHAMP [Champion Microelectronic Corp.]
Página de início  http://www.champion-micro.com
Logo CHAMP - Champion Microelectronic Corp.

CM6903 Folha de dados(HTML) 2 Page - Champion Microelectronic Corp.

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CM6903/4
Low Pin Count PFC/PWM CONTROLLER COMBO
2002/12/16
Preliminary Rev. 0.4
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
15
23
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
2.75V
1.5V
VCC OVP
+
-
.
-
67KHz
-
+
.
fpwm=
1V
9
IAC
PWMCMP
-
.
-
+
CM6903
VREF OK
1
DCILIMIT
Tri-Fault
Detect
+
+
OUT
U1
SUM
.
.
.
0.75V
4
PFCOUT
VREFOK
PWMCLK
VCC
VIN OK
+
-
.
+
UVLO
..
RAMP
PFCCMP
+
-
.
PWM CLK
gmv
VFB
PFCCLKB
PWMCLK
.
.
VREF OK
8
VFB
2.5V
6
ISENSE
0.5V
fpwm=134KHz
R1B
3
PWMOUT
2.45V
2.5V
fpfc=
16.4V
UVLO
10mS
..
.
100K ohm
400K ohm
4K ohm
7
VEAO
FAULTB
CM6904
PFC ILIMIT
+
-
.
17.9V
67KHz
OSC
VCC
S
R
Q
Q
R
R1A
5
GND
S
R
Q
Q
R
R
R1C
67KHz
2
VCC
PFC OVP
+
-
.
-
fpfc=
SS
+
-
.
PFCCLKB
..
-1V
ISENSEAMP



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