CM6903/4
Low Pin Count PFC/PWM C
ONTROLLER
C
OMBO
ELECTRICAL CHARACTERISTICS
(Conti.) Unless otherwise stated, these specifications apply
Vcc=+15V, R
T
= 52.3kΩ, C
T
= 470pF, T
A
=Operating Temperature Range (Note 1)
Symbol
Parameter
Test Conditions
PFC OVP Comparator
Threshold Voltage
Hysteresis
PFC I
LIMIT
Comparator
Threshold Voltage
Delay to Output
V
IN
OK Comparator
Threshold Voltage
Hysteresis
PWM Digital Soft Start
Digital Soft Start Timer (Note 2)
Right After Start Up (CM6903)
Right After Start Up (CM6904)
DC I
LIMIT
Comparator
Threshold Voltage
Delay to Output (Note 2)
Tri-Fault Detect Comparator
Fault Detect HIGH
Time to Fault Detect HIGH
Fault Detect LOW
Oscillator
Initial Accuracy
Voltage Stability
Temperature Stability
Total Variation
PFC Dead Time (Note 2)
PFC
Minimum Duty Cycle
Maximum Duty Cycle
Output Low Impedance
Output Low Voltage
Output High Impendence
Output High Voltage
Rise/Fall Time (Note 2)
I
OUT
= 100mA, V
CC
= 15V
C
L
= 1000pF
13.5
I
OUT
= -100mA
I
OUT
= -10mA, V
CC
= 8V
I
AC
=100uA,V
FB
=2.55V, I
SENSE
= 0V
I
AC
=0uA,V
FB
=2.0V, I
SENSE
= 0V
90
95
8
0.8
0.4
8
14.2
50
15
1.5
0.8
15
0
%
%
ohm
V
V
ohm
V
ns
Line, Temp
60
0.3
T
A
= 25℃
10V < V
CC
< 15V
62
67
1
2
67
0.45
74.5
0.65
74
kHz
%
%
kHz
µs
V
FB
=V
FAULT DETECT LOW
to V
FB
= OPEN,
470pF from V
FB
to GND
0.4
2.65
2.75
2
0.5
2.85
4
0.6
V
ms
V
1.4
1.5
150
1.6
300
V
ns
10
5
ms
ms
2.35
1.65
2.45
1.75
2.55
1.85
V
V
-0.9
-1
150
-1.15
300
V
ns
2.70
230
2.77
2.85
290
V
mV
CM6903/4
Min.
Typ.
Max.
Unit
2002/12/16
Preliminary
Rev. 0.4
Champion Microelectronic Corporation
Page 4
CHAMP [ CHAMPION MICROELECTRONIC CORP. ]
