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UC2854A 数据表(PDF) 9 Page - Texas Instruments

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部件名 UC2854A
功能描述  ADVANCED HIGH-POWER FACTOR PREREGULATOR
Download  16 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

UC2854A 数据表(HTML) 9 Page - Texas Instruments

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UC1854B
UC2854A, UC2854B
UC3854A, UC3854B
SLUS329B − JUNE 1998 − REVISED FEBRUARY 2005
9
www.ti.com
TYPICAL CHARACTERISTICS
Figure 1
0
0
100
300
400
500
600
800
200
700
0.01
0.02
0.03
0.04
0.05
GATE DRIVE TIMING
vs
LOAD CAPACITANCE
CLOAD − Load Capacitance − µF
Rise Time
Fall Time
Figure 2
1000
70
75
80
85
90
95
100
10 k
100 k
GATE DRIVE MAXIMUM DUTY CYCLE
vs
OSCILLATOR CHARGING RESISTANCE
RSET − Oscillator Charging Resistance − Ω
0
0.84
0.80
50
100
0.88
0.96
0.92
1.00
1.04
1.08
1.16
1.12
1.20
150
200
250
Figure 3
MULTIPLIER GAIN CONSTANT
vs
SUPPLY CURRENT
IAC − Supply Current − µA
VRMS = 3 V
VRMS = 5 V
VRMS = 1.5 V
VA Out = 3.5 V
Figure 4
MULTIPLIER GAIN CONSTANT
vs
SUPPLY CURRENT
IAC − Supply Current − µA
0
0.84
0.80
50
100
0.88
0.96
0.92
1.00
1.04
1.08
1.16
1.12
1.20
150
200
250
VRMS = 1.5 V
VRMS = 1.5 V
VRMS = 5 V
VA Out = 5 V


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