A8509GLBTR-T Просмотр технического описания (PDF) - Allegro MicroSystems

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производитель

A8509GLBTR-T

Wide Input Voltage Range, High Efficiency 4-Channel Fault Tolerant LED Driver

Allegro MicroSystems 

A8509

Wide Input Voltage Range, High Efficiency

4-Channel Fault Tolerant LED Driver

Functional Block Diagram

VDD VDR

GATE SENP SENN

Regulator

VIN

UVLO

1.25 V

Ref

VREF

Internal VDD

AGND

FSET/SYNC

COMP

MODE

EN

PWM

ISET

Oscillator

VREF2 +

FB –

∑

–

+

Driver

Circuit

Fault

Internal

Soft Start

ISS

70 kΩ

Current

Sense

Thermal

Shutdown

100 kΩ

100 kΩ

Enable

PWM

VREF1

ISS

ISET

FB

AGND

Fault

LED

Driver

OVP/UVP

Sense

VREF

Open/Short

LED Detect

OVP

50 μA

LED1

LED2

LED3

LED4

FAULT

PAD

LP Package Only

PGND

AGND

Allegro MicroSystems, Inc.

3

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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