A8519KETTR-R datasheet(27/35 Pages) ALLEGRO

27 / 35 page

Wide Input Voltage Range, High-Efficiency,

Fault-Tolerant LED Driver

A8519 and

A8519-1

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Fault Name

Type

Active

Fault

Flag

Set

Description

Boost

Disconnect

Switch

LED

Sink

Drivers

Undervoltage

Protection

Auto-

restart

Always

YES

Device immediately shuts off boost and current sinks if

the voltage at OVP pin is below VUVP(th). It will auto-

restart once the fault is removed.

OFF

LED String Short

Detection

Auto-

restart

Always

Fault occurs when the LED pin voltage exceeds

5.2 V. Once the LED string short fault is detected, the

LED string above the threshold will be removed from

operation.

OFF for

shorted

pins, ON

for all

others

Overtemperature

Protection

Auto-

restart

Always

Fault occurs when the die temperature exceeds the

overtemperature threshold, typically 170°C.

OFF

VIN UVLO

Auto-

restart

Always

Fault occurs when VIN drops below VUVLOfall, typically

below 3.9 V. This fault resets all latched faults.

OFF

A8519KETTR-R Datasheet(PDF) 27 Page - Allegro MicroSystems

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