Datasheet > A8521KLPTR-T

A8521KLPTR-T

更新时间： 2024-01-30 16:11:03

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
35页	1284K
描述
The A8521 is a multi-output white LED driver for small-size LCD backlighting.

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中文翻译

获取价格

数据手册

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A8521KLPTR-T 数据手册

Wide Input Voltage Range, High Efficiency

Fault Tolerant LED Driver

A8521

Description (continued)

TheA8521 is provided in a 20-pin TSSOP package (suffix LP) with

an exposed pad for enhanced thermal dissipation. It is lead (Pb) free,

with 100% matte tin lead frame plating.

Selection Guide

Part Number

Packing*

A8521KLPTR-T

4000 pieces per 13-in. reel

*Contact Allegro for additional packing options

Absolute Maximum Ratings*

Characteristic

Symbol

Notes

Rating

Unit

LEDx Pins

OVP Pin

–0.3 to 55

–0.3 to 60

VSENSE and GATE pins should not exceed V_IN

by more than 0.4 V

VIN, VSENSE, GATE Pins

SW Pin

–0.3 to 40

Continuous

t < 50 ns

–0.6 to 62

–1.0

¯¯¯¯¯¯¯¯¯

FAULT Pin

-0.3 to 40

–0.3 to 5.5

–0.3 to 7

–40 to 125

150

ISET, FSET, APWM, COMP Pins

All Other Pins

Operating Ambient Temperature

Maximum Junction Temperature

Storage Temperature

T_A

T_J(max)

T_stg

Range K

ºC

–55 to 150

*Stresses beyond those listed in this table may cause permanent damage to the device. The Absolute Maximum ratings are

stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the Electrical

Characteristics table is not implied. Exposure to Absolute Maximum-rated conditions for extended periods may affect device reliability.

Table of Contents

Specifications

Pin-out Diagram and Terminal List

Overvoltage protection

Boost switch overcurrent protection

Input overcurrent protection and

disconnect switch

Setting the current sense resistor

Input UVLO

VDD

Shutdown

Fault protection during operation

Characteristic Performance

Functional Description

Enabling the IC

Powering up: LED pin short-to-ground check

Soft start function

Frequency selection

Sync

LED current setting and LED dimming

PWM dimming

APWM pin

Application Information

Design Example for Boost Configuration

Design Example for SEPIC Configuration

Package Outline Drawing

Analog dimming

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

123 4 5 6 7...35

中文翻译

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与A8521KLPTR-T相关器件

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A8530	ALLEGRO	获取价格	Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver
A8530EES-T	ALLEGRO	获取价格	Display Driver, PQCC16
A8530EESTR-T	ALLEGRO	获取价格	Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver
A854CE-221M	TOKO	获取价格	Fixed Inductors for Surface Mounting
A854CE-221M=P3	TOKO	获取价格	General Purpose Inductor, 220uH, 20%, 1 Element, Ferrite-Core, SMD
A854CE-331M	TOKO	获取价格	Fixed Inductors for Surface Mounting
A854CE-331M=P3	TOKO	获取价格	General Purpose Inductor, 330uH, 20%, 1 Element, Ferrite-Core, SMD
A854CE-471M	TOKO	获取价格	Fixed Inductors for Surface Mounting
A854CE-471M=P3	TOKO	获取价格	General Purpose Inductor, 470uH, 20%, 1 Element, Ferrite-Core, SMD
A854CY-100M	TOKO	获取价格	Fixed Inductors for Surface Mounting

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