CM6900 Datasheet, PDF (3/19 Pages) List of Unclassifed Manufacturers – PFC/PWM COMBO w/ INRUSH CURRENT CONTROL & SEPARATED PFCOVP

CM6900
PFC/PWM COMBO w/ INRUSH CURRENT CONTROL & SEPARATED PFCOVP
APPLICATIONS
! Desktop PC Power Supply
! Internet Server Power Supply
! IPC Power Supply
! UPS
! Battery Charger
! DC Motor Power Supply
! Monitor Power Supply
! Telecom System Power Supply
! Distributed Power
PIN CONFIGURATION
SOP-20 (S20) / PDIP-20 (P20)
Top View
1
IEAO
VEAO
20
2
IAC
VFB
19
3
ISENSE
VFB2
18
4
VRMS
VREF
17
5
IN R U S H S T O P B
VCCA
16
6
SS
VDDD
15
7
VDC
PFCOUT
14
8
RAMP1 PWMOUT
13
9
RAMP2
VSSD
12
10
DC ILIMIT
AGND
11
PIN DESCRIPTION
Pin No. Symbol
Description
1 IEAO
PFC transconductance current error amplifier output
2
IAC
3
ISENSE
PFC gain control reference input
Current sense input to the PFC current limit comparator
4
VRMS
Input for PFC RMS line voltage compensation
5 INRUSHSTO Inrush Current Control pin, It is low when Inrush current is high
PB
or during the start-up condition and it is VCCA when Inrush
condition has been removed.
6 SS
Connection point for the PWM soft start capacitor
7
VDC
PWM voltage feedback input
8 RAMP 1
Oscillator timing node; timing set by RT CT
(RTCT)
9 RAMP 2
When in current mode, this pin functions as the current sense
input; when in voltage mode, it is the PWM input from PFC
(PWM RAMP) output (feed forward ramp).
10 DC ILIMIT
PWM current limit comparator input
Operating Voltage
Min. Typ.
Max.
Unit
0
4.25
V
0
1
mA
-5
0.7
V
0
6
V
0
VCCA
V
0
VREF+0.7 V
0
VREF+0.7 V
1.2
3.9
V
0
VREF+0.7 V
0
1
V
11 AGND
Analog Ground
12 VSSD
Digital Ground
13 PWM OUT PWM driver output
14 PFC OUT PFC driver output
0
VDDD
V
0
VDDD
V
2003/04/23 Preliminary Rev. 1.2
Champion Microelectronic Corporation
Page 2