CM6800A Datasheet, PDF (7/18 Pages) Champion Microelectronic Corp. – LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO

CM6800A
LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
TYPICAL PERFORMANCE CHARACTERISTIC
127
120
113
106
99
92
85
78
71
64
57
2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3
VFB (V)
Voltage Error Amplifier (g_mv) Transconductance
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
VRMS (V)
Gain Modulator Transfer Characteristic (K)
K = ^{IGAINMOD − IOFFSET} mV ^{- 1}
IAC x (6 - 0.625)
100
90
80
70
60
50
40
30
20
10
0
-500
0
500
ISENSE(mV)
Current Error Amplifier (g_mi) Transconductance
2.2
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
VRMS (V)
Gain
Gain = ^{ISENSE − IOFFSET}
IAC
2006/10/11 Rev. 1.3
Champion Microelectronic Corporation
Page 7