ML4826 데이터 시트보기 (PDF) - Fairchild Semiconductor
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ML4826 Datasheet PDF : 16 Pages
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ML4826
Typical Performance Characteristics
250
200
150
100
50
0
0
1
2
3
4
5
VFB (V)
Voltage Error Amplifier (VEA) Transconductance (gm)
400
PRODUCT SPECIFICATION
250
200
150
100
50
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
20
VEAO
1
IEAO
VFB
19
VEA
-
3.5kΩ IEA
-
2.5V +
IAC
+
+
-
2
VRMS
4
ISENSE
GAIN
MODULATOR
8V
3.5kΩ
3
RAMP 1
8
RTCT
7
OSCILLATOR
x2
2.7V
OVP
+
-
-1V +
-
PFC ILIMIT
VCCZ
13.5V
17
VCC
7.5V
REFERENCE
VREF
18
SQ
RQ
SQ
PFC OUT
15
RQ
VCCZ
UVLO
Figure 1. PFC Section Block Diagram.
6
REV. 1.0.5 2/14/02
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