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A8501KLPTR-B PDF预览

A8501KLPTR-B

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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A8501KLPTR-B 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Not Recommended零件包装代码：TSSOP
包装说明：HTSSOP, TSSOP28,.25针数：28
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.65
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：R-PDSO-G28
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）：NOT SPECIFIED
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：NOT SPECIFIED宽度：4.4 mm
最小 fmax：2.4 MHzBase Number Matches：1

A8501KLPTR-B 数据手册

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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)  
IN  
▪ 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 (Vf = 3.5 V, If = 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 VIN variation  
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  
D1  
VBAT  
COUT  
4.7 μF  
50 V  
L1  
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  
EN  
COMP  
CCOMP  
1 μF  
10 V  
RFSET  
25.5 kΩ  
DIM  
FSET  
NC  
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  
1234567...24

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A8501KLPTR-T ALLEGRO

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 		LED Driver, 24-Segment, PDSO28, LEAD FREE, MO-153AET, TSSOP-28
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 		WLED/RGB Backlight Driver for Medium Size LCDs
A8504EECTR-T ALLEGRO

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 		WLED/RGB Backlight Driver for Medium Size LCDs
A8507 ALLEGRO

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 		LED Backlight Driver for LCD Monitors and Televisions
A8507ELBTR-T ALLEGRO

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 		LED Driver, 54-Segment, PDSO24, LEAD FREE, MS-013AD, SOIC-24
A8507ELPTR-T ALLEGRO

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 		LED Driver, 54-Segment, PDSO24, LEAD FREE, MO-153ADT, TSSOP-24
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