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A8435 データシート(PDF) 5 Page - Allegro MicroSystems |
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A8435 データシート(HTML) 5 Page - Allegro MicroSystems |
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5 / 9 page ![]() High Efficiency Charge Pump White LED Driver A8435 5 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Performance Characteristics Tests performed using application circuit shown in figure 1: dual wire control; and VIN=3.6 V, EN1 = EN2 = VIN, CIN=C1=C2=COUT=1 μF, RSET=7.5 kΩ, TA=25°C (unless otherwise noted) 50 60 70 80 90 100 2.70 2.90 3.10 3.30 3.50 3.70 3.90 4.10 VIN (V) 4.75 9.8 17.6 (Full Brightness) Dimming Level (mA) 0 20 40 60 80 100 120 2.70 2.90 3.10 3.30 3.50 3.70 3.90 4.10 VIN (V) VIN Rising VIN Falling 17.6 mA 9.8 mA 4.75 mA VIN Rising VIN Falling VIN Rising VIN Falling 10 11 12 13 14 15 16 17 18 19 20 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VIN (V) Efficiency versus Supply Voltage Over Range of Dimming Levels, VIN Falling Supply Current versus Supply Voltage Over Range of Dimming Levels (mA) LED Current versus Supply Voltage Matching Between LEDs <1% Over Range of VIN |
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