CM6824
LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
ELECTRICAL CHARACTERISTICS (Conti.) Unless otherwise stated, these specifications apply
Vcc=+15V, RT = 52.3kΩ, CT = 470pF, TA=Operating Temperature Range (Note 1)
CM6824
Symbol
Parameter
Test Conditions
Unit
Min.
Typ.
-65
75
70
75
Max.
-35
Sink Current
ISENSE = +0.5V, IEAO = 4.0V
ISENSE = -0.5V, IEAO = 1.5V
µA
µA
dB
dB
Source Current
Open Loop Gain
Power Supply Rejection Ratio
35
60
60
11V < VCC < 16.5V
PFC OVP Comparator
Threshold Voltage
Hysteresis
2.70
230
2.77
0.5
2.85
290
V
mV
Low Power Detect Comparator
VCC OVP Comparator
Threshold Voltage
0.4
0.6
V
Threshold Voltage
Hysteresis
19
1.40
19.4
1.5
20
1.65
V
V
PFC ILIMIT Comparator
Threshold Voltage
(PFC ILIMIT VTH – Gain Modulator
Output)
-1.10
80
-1.00
200
-0.90
V
mV
ns
Delay to Output (Note 4)
Overdrive Voltage = -100mV
250
DC ILIMIT Comparator
Threshold Voltage
0.95
1.0
1.05
V
Delay to Output (Note 4)
Overdrive Voltage = 100mV
250
ns
VIN OK Comparator
Threshold Voltage
Hysteresis
2.35
0.8
2.45
1.0
2.55
1.2
V
V
GAIN Modulator
IAC = 100µA, VRMS = VFB = 0V
IAC = 100µA, VRMS = 1.1V, VFB = 0V
IAC = 150µA, VRMS = 1.8V, VFB = 0V
IAC = 300µA, VRMS = 3.3V, VFB = 0V
IAC = 100µA
0.36
1.20
0.55
0.14
0.55
1.80
0.80
0.20
10
0.66
2.24
1.01
0.26
Gain (Note 3)
Bandwidth
Output Voltage =
3.5K*(ISENSE-IOFFSET
MHz
V
IAC = 250µA, VRMS = 1.1V, VFB = 0V
0.70
66
0.80
0.90
75.5
)
Oscillator
TA = 25℃
Initial Accuracy
Voltage Stability
Temperature Stability
Total Variation
Ramp Valley to Peak Voltage
PFC Dead Time (Note 4)
CT Discharge Current
kHz
%
%
kHz
V
ns
11V < VCC < 16.5V
Line, Temp
1
2
68
84
2.5
500
6.5
700
10.5
VRAMP2 = 0V, VRAMP1 = 2.5V
mA
2002/09/20 Preliminary Rev. 1.1
Champion Microelectronic Corporation
Page 5