CM6800A_09 Datasheet, PDF (2/18 Pages) Champion Microelectronic Corp. – LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO

CM6800A
LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
PIN DESCRIPTION
Pin No. Symbol
Description
1 IEAO
PFC transconductance current error amplifier output
Operating Voltage
Min. Typ. Max. Unit
0
4.25
V
2
I_AC
PFC gain control reference input
0
1
mA
3
I_SENSE
Current sense input to the PFC current limit comparator
-5
0.7
V
4
V_RMS
Input for PFC RMS line voltage compensation
0
6
V
5 SS
Connection point for the PWM soft start capacitor
0
8
V
6
V_DC
PWM voltage feedback input
0
RAMP 1
7
Oscillator timing node; timing set by RT CT
1.2
(RTCT)
RAMP 2
8
When in current mode, this pin functions as the current sense
input; when in voltage mode, it is the PWM input from PFC
0
(PWM RAMP) output (feed forward ramp).
9
DC I_LIMIT
PWM current limit comparator input
0
8
V
3.9
V
6
V
1
V
10 GND
Ground
11 PWM OUT PWM driver output
0
VCC
V
12 PFC OUT PFC driver output
0
VCC
V
13 V_CC
Positive supply
10
15
18
V
14 V_REF
Buffered output for the internal 7.5V reference
7.5
V
15 V_FB
16 VEAO
PFC transconductance voltage error amplifier input
PFC transconductance voltage error amplifier output
0
2.5
3
V
0
6
V
2009/08/10 Rev. 1.6
Champion Microelectronic Corporation
Page 2