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LM3450 数据表(PDF) 9 Page - Texas Instruments

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部件名 LM3450
功能描述  LED Drivers with Active Power Factor Correction and Phase Dimming Decoder
Download  39 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM3450 数据表(HTML) 9 Page - Texas Instruments

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background image
0.0
0.2
0.4
0.6
0.8
1.0
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
DEMODULATED VAC PIN DUTY CYCLE
VADJ=3V
2V
1.5V
1V
0.5V
2.5V
VFB (V)
250
200
150
100
50
0
1.5
2.0
2.5
3.0
3.5
VCMP (V)
4.90
3.92
2.94
1.96
0.98
0.00
1.0
1.8
2.6
3.4
4.2
5.0
VAC = 3V
VAC = 4V
VAC = 2V
VAC = 1V
VAC = 0.1V
VAC = 0.5V
LM3450
www.ti.com
SNVS681C – NOVEMBER 2010 – REVISED JUNE 2011
Typical Performance Characteristics (continued)
TA=+25°C and VCC = 14V unless otherwise specified
Transconductance vs. VFB
Current Sense Threshold vs. VCOMP and VAC
Figure 14.
Figure 15.
Decoder Mapping from VAC to DIM
Figure 16.
Copyright © 2010–2011, Texas Instruments Incorporated
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