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ML4804 Datasheet(PDF) 4 Page - Fairchild Semiconductor

Part No. ML4804
Description  Power Factor Correction and PWM Controller Combo
Download  14 Pages
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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ML4804 Datasheet(HTML) 4 Page - Fairchild Semiconductor

 
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ML4804
4
REV. 1.0.2 3/9/2001
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TRI-FAULT DETECT
Fault Detect HIGH
2.65
2.75
2.85
V
Time to Fault Detect HIGH
VFB = VFAULT DETECT LOW
24
ms
to VFB =OPEN; 470pF from VFB to GND
Fault Detect LOW
0.4
0.5
0.6
V
VCCOVP COMPARATOR
Threshold Voltage
TA = Operation Temp Range
16.4
V
Hysteresis
TA = Operation Temp Range
1.7
2.0
2.3
V
PFC ILIMIT COMPARATOR
Threshold Voltage
-0.9
-1.0
-1.1
V
(PFC ILIMIT VTH - Gain Modulator Output)
120
220
mV
Delay to Output
150
300
ns
DC ILIMIT COMPARATOR
Threshold Voltage
0.95
1.0
1.05
V
Input Bias Current
±0.3
±1
µA
Delay to Output
150
300
ns
VIN OK COMPARATOR
Threshold Voltage
2.35
2.45
2.55
V
Hysteresis
0.8
1.0
1.2
V
GAIN MODULATOR
Gain (Note 3)
IAC = 100µA, VRMS = VFB = 0V
0.60
0.80
1.05
IAC = 50µA, VRMS = 1.2V, VFB = 0V
1.8
2.0
2.40
IAC = 50µA, VRMS = 1.8V, VFB = 0V
0.85
1.0
1.25
IAC = 100µA, VRMS = 3.3V, VFB = 0V
0.20
0.30
0.40
Bandwidth
IAC = 100µA
10
MHz
Output Voltage
IAC = 350µA, VRMS = 1V,
0.60
0.75
0.9
V
VFB = 0V
OSCILLATOR
Initial Accuracy
TA = 25°C
717681
kHz
Voltage Stability
11V < VCC < 16.5V
1
%
Temperature Stability
2%
Total Variation
Line, Temp
68
84
kHz
Ramp Valley to Peak Voltage
2.5
V
PFC Dead Time
520
600
ns
fOSC = 250kHz, RT = 75.0kΩ, CT = 100pF
250
330
ns
CT Discharge Current
VRAMP 2 = 0V, VRAMP 1 = 2.5V
3.5
5.5
7.5
mA


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