ML4841 View Datasheet(PDF) - Micro Linear Corporation
Part Name
Description
MFG CO.
'ML4841' PDF : 15 Pages View PDF
ML4841
TYPICAL PERFORMANCE CHARACTERISTICS
250
250
200
200
150
150
100
100
50
50
0
0
1
2
3
4
5
VFB (V)
Voltage Error Amplifier (VEA) Transconductance (gm)
400
0
-500
0
500
IEA Input Voltage (mV)
Current Error Amplifier (IEA) Transconductance (gm)
300
200
100
0
0
1
2
3
4
5
VRMS (mV)
Variable Gain Control Transfer Characteristic
16
VEAO
1
IEAO
VFB
15
VEA
-
3.5kΩ IEA
-
2.5V +
+
IAC
+
-
2
VRMS
4
ISENSE
GAIN
MODULATOR
8V
3.5kΩ
3
RAMP 1
8
FROM PWM
÷2
OSCILLATOR
2.7V
OVP
+
-
-1V +
-
PFC ILIMIT
VCCZ
13.5V
13
VCC
7.5V
REFERENCE
VREF
14
SQ
RQ
SQ
PFC OUT
12
RQ
VCCZ
UVLO
Figure 1. PFC Section Block Diagram.
6
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