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| 型号： | A8508GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/28页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR WHITE 8X120MA 24TSSOP |
| 标准包装： | 8,000 |
| 拓扑： | PWM，SEPIC，升压（升压） |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 300kHz ~ 800kHz |
| 电源电压： | 9 V ~ 40 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 24-TSSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 105°C |
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A8508
Selection Guide
Wide Input Voltage Range, High Efficiency
8-Channel Fault Tolerant LED Driver
Part Number
A8508GETTR-T 2
Package
28-contact QFN with exposed thermal pad
Contact factory
Packing 1
A8508GLPTR-T 24-pin TSSOP with exposed thermal pad
4000 pieces per 13-in. reel
A8508GLWTR-T 2
24-pin SOICW
Contact factory
1 Contact Allegro ? for additional packing options.
2 Contact factory for availability.
Absolute Maximum Ratings*
Characteristic
LEDx Pin Voltage
OVP Pin Voltage
VIN Pin Voltage
ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ Pin Voltage
Symbol
V LEDx
V OVP
V IN
V FAULT
Notes
Rating
–0.3 to 55
–0.3 to 60
–0.3 to 40
–0.3 to 40
Unit
V
V
V
V
COMP, EN, FSET/SYNC, ISET,
MODE, PWM, SENN, SENP, and VDD
Pin Voltage
GATE, VDR Pin Voltage
–
–
–0.3 to 5.5
–0.3 to 8
V
V
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
T A
T J (max)
T stg
G temperature range
–40 to 105
150
–55 to 150
oC
oC
oC
*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.
Thermal Characteristics may require derating at maximum conditions, see application information
Characteristic
Package Thermal Resistance
Symbol
R θ JA
Test Conditions*
Package ET, on 4-layer PCB based on JEDEC standard
Package LP, on 4-layer PCB based on JEDEC standard
Package LW, on 4-layer PCB based on JEDEC standard
Value
32
28
44
Unit
oC/W
oC/W
oC/W
*Additional thermal information available on the Allegro website
Table of Contents
Specifications
Functional Block Diagram
Pin-out Diagram and Terminal List
Electrical Characteristics Table
Functional Description
Enabling the IC
Powering up: LED pin short-to-GND check
Soft start function
Frequency selection
Synchronization
LED current setting and LED dimming
PWM dimming
Analog dimming
Boost switch overcurrent protection
Setting the current sense resistor
2
3
4
5
8
8
8
9
10
10
11
12
12
13
13
Current sense resistor routing
Pulse-by-pulse current limit
Secondary boost switch limit
Output overvoltage and undervoltage protection
LED Open Detect
Undervoltage Protection (UVP)
LED short detect
Input UVLO
VDD and VDR
Shutdown
Fault protection during operation
Application Information
Paralleling more than one A8508
Design Example
Typical Applications
Package Outline Drawing
Allegro MicroSystems, LLC
115 Northeast Cutoff
13
14
14
14
15
15
16
16
16
17
17
19
19
21
24
27
2
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A8509 | 制造商:ROCKWE 功能描述: |
| A8509GLPTR-T | 功能描述:IC LED DVR WHITE 4X120MA 24TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| A8510 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Wide Input Voltage Range, High Efficiency |
| A8510GECTR-T | 功能描述:IC LED DRVR BCKLGHT/WHT 26QFN-EC RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM，降压（降压） 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED（HBLED） 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M |
| A8511 | 制造商:ROCKWE 功能描述: |
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