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A8519KETTR-R 데이터시트(PDF) 4 Page - Allegro MicroSystems |
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A8519KETTR-R 데이터시트(HTML) 4 Page - Allegro MicroSystems |
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4 / 35 page ![]() Wide Input Voltage Range, High-Efficiency, Fault-Tolerant LED Driver A8519 and A8519-1 4 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Functional Block Diagram Fault Block ISET Block Gate Off LED Driver Block Diode Open Sense TSD OVP2 VOUT OVP Enable Block PWM Block Regulator UVLO Block Input Current Sense Amplifier GATE PWM VSENSE VIN Vin AGND AGND AGND SW FSET AGND 1.235 V Reference NMOS Driver Driver Circuit Internal Soft Start Block VOUT Hyst. Control OVP Sense Open/Short LED Detect Oscillator Internal V CC Internal V CC Frequency Dithering LED1 LED2 LED3 LED4 APWM ISET AGND V REF V REF VDD I ADJ AGND FAULT PGND PGND COMP CLKOUT + – OCP2 Current Sense Error Amplifier |
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