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参数资料
| 型号： | A8504EECTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 16/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHT/RGB BCKLGT 26QFN |
| 标准包装： | 1 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 200kHz ~ 2MHz |
| 电源电压： | 4.2 V ~ 5.5 V |
| 输出电压： | 47V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 26-WFQFN 裸露焊盘 |
| 供应商设备封装： | 26-QFN/MLP-EP（4x4） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1215-6 |
A8504
PCB Layout Guidelines
WLED/RGB Backlight Driver for Medium Size LCDs
tor, C4, so that they form the smallest loop practical. Avoid
The A8504 evaluation board provides a useful model for design-
ing application circuit layouts. The following guidelines should
be observed:
? Place the supply bypass capacitor, C8, close to the VIN pin and
the ground plane.
? Route analog ground, digital signal ground, LED ground
(LGND pin), and power ground (PGND pin) separately. Con-
nect all these grounds at the pad for the exposed thermal pad
under the A8504, serving as a star ground.
? Place the input capacitors, C2 and C7, the inductor, L1, the
boost diode D1, and the internal MOSFET and output capaci-
long traces for these paths.
? Place the RISET, RFSET, and OVP resistors and the compensa-
tion capacitor, C5, close to the ISET, FSET, OVP, and COMP
pins, respectively.
? Provide a substantial solder pad under the exposed thermal
pad on the bottom side of the A8504, to provide good thermal
conduction. Connect the PCB solder pad to the PCB ground
plane with multiple thermal vias. For a thermal via specifica-
tion, please refer to JEDEC guidelines.
? For best thermal performance, avoid thermal stresses.
V IN
L1
CBAT
COUT
V BAT
GND
CIN
D1
ROVP
V OUT
RFSET
CC
RISET
1
2
3
4
5
6
7
PGND
SKIP
COMP
FSET
ISET
GND
LED1
PAD
A8504
21
PGND
20
PWM
GND 19
18
SEL3
17
SEL2
16
SEL1
15
LED2
RPWM
Figure 13. Schematic diagram of A8504 typical application circuit and composite view of typical PCB
layout. In the composite view, the red line superimposed represents the current loop during switch
on-time (return through the A8504 device and the PCB ground plane). The green line represents the
current loop during off-time. Both of these loops should be designed to be as short as practicable.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1 . 508.853.5000; www.allegromicro.com
15
相关PDF资料 |
PDF描述 |
|---|---|
| A8507ELBTR-T | IC DRIVER WLED/RGB 24-SOIC |
| A8508GLPTR-T | IC LED DVR WHITE 8X120MA 24TSSOP |
| A8509GLPTR-T | IC LED DVR WHITE 4X120MA 24TSSOP |
| A8510GECTR-T | IC LED DRVR BCKLGHT/WHT 26QFN-EC |
| A8511KLPTR-T | IC LED DVR 150MA AUTO 28-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A8507 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:LED Backlight Driver for LCD Monitors and Televisions |
| A8507ELBTR-T | 功能描述:IC DRIVER WLED/RGB 24-SOIC 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 |
| A8507ELPTR-T | 功能描述:IC LED DVR WHT/RGB BKLGT 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 |
| A8508 | 制造商:ROCKWE 功能描述: |
| A8508GLPTR-T | 功能描述:IC LED DVR WHITE 8X120MA 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 |
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