CM6800T
(Turbo-Speed PFC+Green PWM)
http://www.championmicro.com.tw
EPA/85+
PFC+PWM COMBO CONTROLLER
Design for High Efficient Power Supply
2010/08/03
Rev. 1.2
Champion Microelectronic Corporation
7
ELECTRICAL CHARACTERISTICS:
(Conti.) Unless otherwise stated, these specifications apply Vcc=+14V, R
T
= 5.88 k
Ω
, C
T
= 1000pF,
T
A
=Operating Temperature Range (Note 1)
CM6800T
Symbol Parameter
Test
Conditions
Min. Typ. Max.
Unit
DC I
LIMIT
Comparator
Threshold
Voltage
0.92 1.0 1.08 V
Delay to Output (Note 4)
Overdrive Voltage = 100mV
700
ns
DC to DC PWM Brown Out Comparator
OK
Threshold
Voltage
2.1 2.3 2.5 V
Hysteresis
880 950 1000 mV
GAIN Modulator
Gain1 (Note 3)
I
AC
= 20
μ
A, V
RMS
=1.125, V
FB
= 2.375V @
T=25
℃
SS<VREF
4.4 5.5 6.6
Gain2 (Note )3
I
AC
= 20
μ
A, V
RMS
= 1.45588V, V
FB
=
2.375V @ T=25
℃
SS<VREF
4 5 6
Gain3 (Note 3)
I
AC
= 20
μ
A, V
RMS
=2.91V, V
FB
= 2.375V @
T=25
℃
SS<VREF
1.2 1.5 1.8
Gain4 (Note 3)
I
AC
= 20
μ
A, V
RMS
= 3.44V, V
FB
= 2.375V
@ T=25
℃
SS<VREF
0.9 1.05 1.3
Bandwidth (Note 4)
I
AC
= 40
μ
A
1
MHz
Output Voltage = Rmul *
(I
SENSE
-I
OFFSET
)
I
AC
= 50
μ
A, V
RMS
= 1.125V, V
FB
= 2V
SS<VREF
0.74 0.8 0.86 V
Oscillator (Measuring fpfc)
Initial fpfc Accuracy 1
R
T
= 5.88 k
Ω
, C
T
= 1000pF, T
A
= 25
℃
IAC=0uA
64 68 72 kHz
Voltage Stability
11V < V
CC
< 16.5V
2
%
Temperature
Stability
2
%
Total Variation
Line, Temp
60
75
kHz
Ramp Valley to Peak Voltage
VEAO=6V and IAC=20uA
2.5
V
PFC Dead Time (Note 4)
550
950
ns
CT Discharge Current
V
RAMP2
= 0V, V
RAMP1
= 2.5V
10
11
12
mA
