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ALT80800KLPATR Datasheet(PDF) 20 Page - Allegro MicroSystems |
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ALT80800KLPATR Datasheet(HTML) 20 Page - Allegro MicroSystems |
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20 / 23 page  Automotive-Grade, Constant-Current 2.0 A PWM Dimmable Synchronous Buck LED Driver ALT80800 20 Allegro MicroSystems, LLC 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com APPLICATION CIRCUIT DIAGRAMS Figure 17: Application Circuit Example for ALT80800 (LED current = 1 A, 500 kHz) LED+ VIN PWM CBOOT RON L1 2.2 µF RSENSE ADIM CLED External PWM dimming signal BOOT FFn CSH CSL TON PWM ADIM VCC ALT80800 GND SW VIN VCCIN EN VIN FDSET VIN FFn 0.2 Ω 178 kΩ 33 µH 0.47 µF 0.1 µF 187 kΩ 187 kΩ 100 kΩ 10 kΩ 0.1 µF + 33 µF 4.7 µF SGND PGND VCC VCC |
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