A8510 データシートの表示（PDF） - Allegro MicroSystems
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A8510 Datasheet PDF : 33 Pages
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A8510
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
ISET to LED Current Gain
versus Ambient Temperature
330
329
328
327
326
325
324
323
322
321
320
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110
Temperature (°C)
VSENSE Pin Sink Current
versus Ambient Temperature
20.8
20.7
20.6
20.5
20.4
20.3
20.2
20.1
20.0
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110
Temperature (°C)
LED to LED Matching Accuracy
versus Ambient Temperature
10.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110
Temperature (°C)
Efficiency for 10 Series LEDs per Channel
ILED = 40 mA, LED Vf ≈ 3.2 V
92
90
88
86
fSW
84
800 kHz
1 MHz
92
80
7 9 11 13 15 17 19 21
Input Voltage, VIN (V)
Input Disconnect Switch Gate to Source Voltage
versus Ambient Temperature
-6.3
-6.4
-6.5
-6.6
-6.7
-6.8
-6.9
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110
Temperature (°C)
LEDx Current versus Ambient Temperature
ISET = 120 μA
40.0
39.8
39.6
39.4
39.2
39.0
38.8
38.6
38.4
38.2
38.0
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110
Temperature (°C)
LED Set Point Accuracy
versus Ambient Temperature
10.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110
Temperature (°C)
Efficiency for 12 Series LEDs per Channel
ILED = 40 mA, LED Vf ≈ 3.2 V
95
90
85
fSW
800 kHz
75
1 MHz
70
7 9 11 13 15 17 19 21
Input Voltage, VIN (V)
Allegro MicroSystems, Inc.
9
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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