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A8530

更新时间： 2024-01-07 04:29:34
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器闪光灯
页数 文件大小 规格书
11页 477K
描述
Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver

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A8530 技术参数

生命周期：ObsoleteReach Compliance Code：unknown
风险等级：5.72特性阻抗：50 Ω
最大输入功率 (CW)：46.99 dBm最大工作频率：4000 MHz
最小工作频率：最高工作温度：125 °C
最低工作温度：-55 °C射频/微波设备类型：FIXED ATTENUATOR
最大电压驻波比：1.35Base Number Matches：1

A8530 数据手册

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A8530  
Ultracompact 6-Channel Backlight  
and Flash/Torch White LED Driver  
Features and Benefits  
Description  
▪ Proprietary adaptive control scheme (1×, 1.5×, 2×)  
▪ 0.5% typical LED current matching  
The A8530 high efficiency charge pump ICs offer a simple,  
low-cost white LED driver solution for driving four display  
backlight and two flash/torch/video mode white LEDs. Using  
a proprietary control scheme (1×, 1.5×, and 2×), the A8530  
can deliver well-matched LED current while maintaining the  
highest efficiency and low EMI. The LED current is regulated  
over the entire range of Li+ battery voltage to provide uniform  
intensity.  
▪ 2 separate serial interfaces for dimming control  
▪ Drives up to 6 white LEDs (4 display backlight, 2 flash/torch)  
▪ 30 mA per LED channel for display backlight  
▪ 100 mA per LED channel for flash/torch backlight  
▪ 320 mA total output current capability  
▪ Low EMI design and soft-start function  
▪ Short circuit, overvoltage, thermal shutdown protection  
▪ 0.75 mm very thin profile, 3 mm × 3 mm package  
LED brightness and on/off can be controlled for 4 display  
backlight LEDs and 2 flash/torch LEDs through 2 single-wire  
serial interface pins.  
TheA8530 is available in a very thin profile (0.75 mm nominal  
height) 3mm×3mm QFN/MLP16 pin package. Applications  
include:  
Package: 16 pin QFN/MLP (suffix ES)  
▪
▪
▪
▪
White LED backlights for cellular phones, PDAs  
Digital cameras, camcorders  
Other portable device white LED backlighting  
320 mA WLED flash/torch  
Approximate Scale 1:1  
Typical Applications  
V
V
COUT  
4.7 µF  
COUT  
4.7 µF  
BATT  
BATT  
2.7 to 5.5 V  
2.7 to 5.5 V  
VIN  
VOUT  
LED1  
LED2  
VIN  
VOUT  
LED1  
LED2  
C1  
C1  
CIN  
CIN  
D1  
D2  
D3  
D4  
D5  
D1  
1 µF  
1 µF  
C1+  
C1–  
C2+  
C2–  
ISET  
ENM  
ENF  
C1+  
C1–  
C2+  
C2–  
ISET  
ENM  
ENF  
4.7 µF  
4.7 µF  
C2  
C2  
A8530  
A8530  
1 µF  
1 µF  
LED3  
LED4  
LED5  
LED6  
LED3  
LED4  
LED5  
LED6  
D5  
D6  
RSET  
RSET  
D6  
On/Off and  
On/Off and  
Dimming  
Control  
GND  
GND  
Dimming  
Control  
D1-D4 Backlight; D5-D6 Flash  
D1-D4 Backlight; D5-D6 Flash  
Figure 1. 4×30 mA backlight with 2×100 mA flash  
Figure 2. 3×100 mA flash  
V
V
COUT  
4.7 µF  
BATT  
BATT  
2.7 to 5.5 V  
VIN  
VOUT  
LED1  
LED2  
VIN  
VOUT  
LED1  
LED2  
C1  
CIN  
CIN  
1 μF  
D1  
D1  
D2  
D3  
D4  
D5  
1 µF  
C1+  
C1–  
C2+  
C2–  
ISET  
ENM  
ENF  
C1+  
C1–  
C2+  
C2–  
ISET  
ENM  
ENF  
4.7 µF  
C2  
A8530  
A8530  
1 µF  
LED3  
LED4  
LED5  
LED6  
LED3  
LED4  
LED5  
LED6  
RSET  
RSET  
D6  
On/Off and  
On/Off and  
Dimming  
Control  
Dimming  
Control  
GND  
GND  
D1-D4 Main; D5-D6 Flash  
VIN>Vf(max)+0.2V, Vf = LED forward drop  
Figure 3. 320 mA flash  
Figure 4. High efficiency current sink  
8530-DS  
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