ML4827
ELECTRICAL CHARACTERISTICS (Continued)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TRI-FAULT DETECT
FaultDetectHIGH
2.6
2.7
2.8
V
Time to Fault Detect HIGH
V
FB
= V
to V =OPEN
FAULT DETECT LOW FB
1nF from VFB to GND
1
2
ms
V
Fault Detect LOW
0.4
0.5
0.6
PFC ILIMIT COMPARATOR
Threshold Voltage
–0.8
100
–1.0
190
150
–1.15
300
V
mV
ns
∆(PFC ILIMIT VTH - Gain Modulator Output)
Delay to Output
DC ILIMIT COMPARATOR
Threshold Voltage
Input Bias Current
Delay to Output
0.9
1.0
±0.3
150
1.1
±1
V
µA
ns
300
VIN OK COMPARATOR
Threshold Voltage
Hysteresis
2.45
0.8
2.55
1.0
2.65
1.2
V
V
GAINMODULATOR
Gain (Note 3)
IAC = 100µA, VRMS = VFB = 0V
IAC = 50µA, VRMS = 1.2V, VFB = 0V
IAC = 50µA, VRMS = 1.8V, VFB = 0V
IAC = 100µA, 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
Bandwidth
MHz
V
Output Voltage
IAC = 250µA, VRMS = 1.15V,
VFB = 0V
0.74
75
0.82
0.90
85
OSCILLATOR
Initial Accuracy
TA = 25°C
80
1
kHz
%
Voltage Stability
VCCZ - 3V < VCC < VCCZ - 0.5V
Temperature Stability
Total Variation
2
%
Line, Temp
72
88
kHz
V
Ramp Valley to Peak Voltage
Dead Time
2.5
600
7.5
PFC Only
450
4.5
750
9.5
ns
CT Discharge Current
VRAMP 2 = 0V, VRAMP 1 = 2.5V
mA
4
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
