Datasheet > A8501KLPTR-T

A8501KLPTR-T

更新时间： 2024-11-09 18:29:15

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动光电二极管接口集成电路
页数	文件大小	规格书
24页	547K
描述
LED Driver, 24-Segment, PDSO28, LEAD FREE, MO-153AET, TSSOP-28

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中文翻译

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技术参数
数据手册

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A8501KLPTR-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	End Of Life	零件包装代码：	TSSOP
包装说明：	HTSSOP, TSSOP28,.25	针数：	28
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.63
接口集成电路类型：	LED DISPLAY DRIVER	JESD-30 代码：	R-PDSO-G28
JESD-609代码：	e3	长度：	9.7 mm
湿度敏感等级：	2	复用显示功能：	NO
功能数量：	1	区段数：	24
端子数量：	28	最高工作温度：	125 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	HTSSOP	封装等效代码：	TSSOP28,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	电源：	12 V
认证状态：	Not Qualified	座面最大高度：	1.2 mm
子类别：	Display Drivers	最大供电电压：	21 V
最小供电电压：	8 V	标称供电电压：	12 V
表面贴装：	YES	温度等级：	AUTOMOTIVE
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	4.4 mm
最小 fmax：	2.4 MHz	Base Number Matches：	1

A8501KLPTR-T 数据手册

A8501

2 MHz, 4 Channel×100 mA WLED/RGB Driver

with Output Disconnect

Features and Benefits

Description

▪ 600 kHz to 2.2 MHz switching frequency—ability to

operate above the AM band

TheA8501isamultioutputWLED/RGBdriverforbacklighting

medium-size displays. TheA8501 integrates a boost converter

and four 100 mA current sinks. LED channels can be tied

together for up to 400 mA sink capability. It can work from a

single power supply of 6.8 to 21 V and withstand up to 40 V.

The boost converter is a constant frequency, current-mode

converter.

▪ Internal bias supply for single-supply operation (V = 6.8 to 21 V)

▪ Boost converter with integrated 40 V DMOS switch and

OVP–load-dump protection

▪ 3.5 μA shutdown current—limits battery drain

▪ Active current sharing between LED strings for

0.8% current matching and 0.7% accuracy

▪ Drive up to 9 series LEDs in 4 parallel strings, 36 LEDs

maximum (V_f= 3.5 V, I_f= 100 mA)

▪ LED sinks rated for 100 mA each (400 mA total)

▪ PWM dimming with LED PWM duty cycle control

▪ 4000:1 dimming range

Operating frequency can be set to 2 MHz in order to avoid

interference with the AM radio band. The integrated boost

DMOSswitchisratedfor40Vat3.6A. PWMdimmingallows

LEDcurrentstobecontrolledatuptoa1000:1ratio.Additional

4:1 dimming can be achieved by using the DIM pin.

▪ Extensive fault mode protection schemes:

▫ Shorted LED protection against misconnected loads—

with true output disconnect

▫ Open LED disconnect protects against LED failures

▫ External thermistor sensing to limit LED temperature

▫ Output overvoltage protection (OVP): 19.5 V default can

be adjusted as high as 38 V

▫ Open Schottky and open OVP resistor protection against

external component failure

▫ Input under- and overvoltage protection (UVLO and

OVLO) against V_INvariation

TheA8501providesprotectionagainstoutputconnectorshorts

through an integrated output disconnect switch. An optional

external thermistor can be used to limit LED current based on

panel temperature.

The device is supplied in a surface mount, 28-pin TSSOP

package (suffix LP), with exposed thermal pad for enhanced

thermal dissipation. It is lead (Pb) free, with a leadframe

plating choice of 100% matte-tin (suffix T) or tin-bismuth

(suffix B).

Applications include:

▫ Boost current limit, output short circuit limit,

overtemperature protection (OTP), and soft start

▪ GPS navigation systems

▪ Automotive infotainment

▪ Back-up camera displays

▪ Cluster backlighting

Package:

▪ Portable DVD players

▪ Industrial LCD displays

28-pin TSSOP with

exposed thermal pad

(package LP)

Not to scale

Typical Application

V_BAT

COUT

4.7 μF

50 V

CBAT

4.7 μF

35 V

CIN

ROVP

78.7 kΩ

10 μH

Figure 1. LCD monitor backlight driving

4 LED strings. On/off and dimming

control using ENABLE pin.

• Current = 50 mA per string

• OVP = 35 V nominal

VIN

SW SW SW

OVP CAP

OUT

COMP

CCOMP

1 μF

10 V

RFSET

25.5 kΩ

DIM

FSET

A8501

• Switching frequency = 2 MHz

BIAS

SEL2

SEL1

VTO

VTI

CBIAS

0.1 μF

10 V

PAD

A8501

VTO

LED1

LED2

LED3

LED4

RVC

VTI

ISET

NTC

–t°

AGND PGND PGND PGND LGND DGND

RISET

24.3 kΩ

Optional Configuration

for Thermal Derating

8501-DS, Rev.4

12 3 4 5 6 7...24

中文翻译

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与A8501KLPTR-T相关器件

型号	品牌	获取价格	描述	数据表
A8502	ALLEGRO	获取价格	Wide Input Voltage Range, High Efficiency
A8503	ALLEGRO	获取价格	High Efficiency 6-Channel, 2 MHz, WLED/RGB Driver
A8503GECTR-T	ALLEGRO	获取价格	LED Driver, 72-Segment, QFN-26
A8504	ALLEGRO	获取价格	WLED/RGB Backlight Driver for Medium Size LCDs
A8504EECTR-T	ALLEGRO	获取价格	WLED/RGB Backlight Driver for Medium Size LCDs
A8507	ALLEGRO	获取价格	LED Backlight Driver for LCD Monitors and Televisions
A8507ELBTR-T	ALLEGRO	获取价格	LED Driver, 54-Segment, PDSO24, LEAD FREE, MS-013AD, SOIC-24
A8507ELPTR-T	ALLEGRO	获取价格	LED Driver, 54-Segment, PDSO24, LEAD FREE, MO-153ADT, TSSOP-24
A8508	ALLEGRO	获取价格	Wide Input Voltage Range, High Efficiency
A8508GLPTR-T	ALLEGRO	获取价格	LED Driver, 8-Segment, PDSO24, TSSOP-24

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