ml4841 Fairchild Semiconductor, ml4841 Datasheet - Page 4

• Manufacturer Part Number: ml4841
• Description: Ml4841 Variable Feedforward Pfc/pwm Controller Combo
• Manufacturer: Fairchild Semiconductor

ML4841
Electrical Characteristics
Unless otherwise specified, I
Operating Temperature Range (Note 1)
4
Symbol
OVP Comparator
PFC I
DC I
V
Gain Modulator
Oscillator
IN
OK Comparator
LIMIT
LIMIT
Input Bias Current
Output High Voltage
Output Low Voltage
Source Current
Sink Current
Open Loop Gain
PSRR
Threshold Voltage
Hysteresis
Threshold Voltage
∆(PFC I
Modulator Output)
Delay to Output
Threshold Voltage
Input Bias Current
Delay to Output
Threshold Voltage
Hysteresis
Gain (Note 3)
Bandwidth
Output Voltage
Initial Accuracy
Voltage Stability
Temperature Stability
Total Variation
Ramp Valley to Peak Voltage
Dead Time
C
Comparator
T
Comparator
Discharge Current
LIMIT
Parameter
V
TH
CC
- Gain
= 25mA, R
(continued)
T
∆V
∆V
V
I
I
I
I
IAC = 100µA
I
V
T
V
Line, Temp
PFC Only
V
AC
AC
AC
AC
AC
A
= 23kΩ, R
CCZ
FB
CCZ
RAMP 2
IN
IN
= 25°C
= 100µA, V
= 100µA, V
= 50µA, V
= 50µA, V
= 250µA, V
= 0V
= ±0.5V, V
= ±0.5V, V
- 3V < V
- 3V < V
= 0V, V
RAMP1
Conditions
RMS
RMS
CC
CC
RMS
RMS
RMS
OUT
OUT
RAMP 1
< V
< V
= 1.2V, V
= 1.8V, V
= 28.7kΩ, C
= 3.3V, V
= V
= 1.15V,
= 6V
= 1.5V
CCZ
CCZ
FB
= 2.5V
- 0.5V
- 0.5V
= 0V
FB
FB
FB
T
= 0V
= 0V
= 0V
= 400pF, C
Min.
0.35
1.15
0.52
0.14
0.74
-0.8
100
188
182
260
6.0
-40
2.6
0.9
2.4
0.8
4.5
40
60
60
70
RAMP1
PRODUCT SPECIFICATION
Typ.
0.65
±0.3
0.50
1.65
0.74
0.20
0.82
-0.5
-1.0
190
150
150
200
400
-90
6.7
2.7
1.0
2.5
1.0
2.5
7.5
90
75
75
95
10
1
2
= 270pF, T
REV. 1.0.3 6/13/01
-1.15
Max.
0.65
2.15
0.96
0.26
0.90
-1.0
125
300
300
212
218
1.0
2.8
1.1
2.6
1.2
9.5
±1
A
=
Units
MHz
kHz
kHz
mV
mV
mA
µA
µA
µA
dB
dB
µA
ns
ns
ns
%
%
V
V
V
V
V
V
V
V
V