FAN4822 Datasheet, PDF (4/10 Pages) Fairchild Semiconductor – ZVS Average Current PFC Controller

FAN4822
PRODUCT SPECIFICATION
Electrical Characteristics (Continued)
Unless otherwise specified, RT = 52.3kΩ, CT = 470pF, TA = Operating Temperature Range (Note 1)
Parameter
Conditions
Min.
Typ.
Gain Modulator
Gain (Note 2)
Bandwidth
Output Voltage
Oscillator
IIAC = 100mA, VVRMS = 0V,
VFB = 0V
IIAC = 50mA, VVRMS = 1.2V,
VFB = 0V
IIAC = 100µA, VVRMS = 1.8V,
VFB = 0V
IIAC = 100µA, VVRMS = 3.3V,
VFB = 0V
IIAC = 250µA
VFB = 0V, VVRMS = 1.15V, IIAC =
250µA
0.36
0.51
1.20
1.72
0.55
0.78
0.14
0.20
10
0.72
0.8
Initial Accuracy
Voltage Stability
Temperature Stability
TA = 25°C
VCCZ – 3V < VCC < VCCZ – 0.5V
74
80
1
2
Total Variation
Line, temperature
72
Ramp Valley to Peak Voltage
2.5
Dead Time
100
300
CT Discharge Current
Reference
4.5
7.5
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
TA = 25°C, IREF = 1mA
VCCZ – 3V < VCC < VCCZ – 0.5V
1mA < IREF, < 20mA
7.4
7.5
2
2
0.4
Total Variation
Line, load, and temperature
7.35
Long Term Stability
Short Circuit Current
PFC Comparator
Tj = 125°C, 1000 hours
VCC < VCCZ – 0.5V, VREF = 0V
5
–15
–40
Minimum Duty Cycle
Maximum Duty Cycle
MOSFET Driver Outputs
VIEAO > 6.7V
VIEAO < 1.2V
90
95
Output Low Voltage
Output High Voltage
Output Rise/Fall Time
Undervoltage Lockout
IOUT = –20mA
IOUT = –100mA
IOUT = –10mA, VCC = 8V
IOUT = 20mA
IOUT = 100mA
CL = 1000pF
0.4
1.5
0.8
9.5
10.3
9
10.3
40
Threshold Voltage
VCCZ – VCCZ –
0.9
0.6
Hysteresis
2.4
2.9
Max.
0.66
2.24
1.01
0.26
0.9
87
89
450
9.5
7.6
10
15
7.65
25
–100
0
1.0
3.5
1.5
VCCZ –
0.2
3.45
Units
MHz
V
kHz
%
%
kHz
V
ns
mA
V
mV
mV
%
V
mV
mA
%
%
V
V
V
V
V
ns
V
V
4
REV. 1.0.1 8/10/01