ML4824 데이터 시트보기 (PDF) - Fairchild Semiconductor
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ML4824 Datasheet PDF : 16 Pages
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ML4824
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)
Gain Modulator Transfer Characteristic (K)
16
VEAO
1
IEAO
VFB
15
2.5V
IAC
2
VRMS
4
ISENSE
3
VEA
–
+
3.5kΩ IEA
+
–
GAIN
MODULATOR
3.5kΩ
RAMP 1
7
+
–
OSCILLATOR
2.7V
OVP
+
–
–1V +
–
PFC ILIMIT
Figure 1. PFC Section Block Diagram.
6
SQ
RQ
SQ
RQ
PFC OUT
12
REV. 1.01 12/7/2000
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