LM3450 Datasheet, PDF (6/40 Pages) National Semiconductor (TI) – LED Driver with Active Power Factor Correction and Phase Dimming Decoder

LM3450
SNVS681D – NOVEMBER 2010 – REVISED MAY 2013
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TYPICAL PERFORMANCE CHARACTERISTICS
T_A=+25°C and V_CC = 14V unless otherwise specified
HOLD R_DSON vs. Junction Temperature
40
Leading Edge Blanking vs. Junction Temperature
150
36
146
32
142
28
138
24
134
20
-50 -14
22
58
94 130
TEMPERATURE (°C)
Figure 2.
Current Limit Threshold vs. Junction Temperature
V_AC = 3V; V_CMP = V_THM + 1.5V
1.505
130
-50 -14
22
58
94 130
TEMPERATURE (°C)
Figure 3.
Multiplier Gain vs. Junction Temperature
V_AC = 3V; V_CMP = V_THM + 1.5V
0.510
1.503
0.504
1.501
0.498
1.499
0.492
1.497
0.486
1.495
-50
140
-14
22
58
94 130
TEMPERATURE (°C)
Figure 4.
Transconductance
V_FB = 2.5V; ΔV_FB = 50mV
0.480
-50 -14
22
58
94 130
TEMPERATURE (°C)
Figure 5.
BIAS Voltage vs. Junction Temperature
High @ V_CC < V_CCFALL; Low @ V_CC > V_CCRISE
25
130
22
BIAS High
120
19
110
16
BIAS Low
100
13
90
-50 -14
22
58
94 130
TEMPERATURE (°C)
Figure 6.
10
-50 -14
22
58
94 130
TEMPERATURE (°C)
Figure 7.
6
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