《電子技術應用》
您所在的位置:首頁 > 模擬設計 > 設計應用 > 基于AS3676設計的LED照明管理技術
基于AS3676設計的LED照明管理技術
摘要: 本文介紹了AS3676主要特性, 應用方框圖, 模擬LDO方框圖, 升壓DC/DC轉(zhuǎn)換器方框圖, 環(huán)境光傳感器內(nèi)部電路圖以及LED功能測試電路圖, 自動控制LED內(nèi)部電路圖和外接元件列表.
Abstract:
Key words :

本文介紹了AS3676主要特性, 應用方框圖, 模擬LDO方框圖, 升壓DC/DC轉(zhuǎn)換器方框圖, 環(huán)境光傳感器內(nèi)部電路圖以及LED功能測試電路圖, 自動控制LED內(nèi)部電路圖和外接元件列表.

Aaustriamicrosystems公司的 AS3676 是高度集成的CMOS功率和照明管理單元,適嗯移動手機或其它以一節(jié)鋰離子電池或3節(jié)NiMH 電池供電的設備.它集成了一個用于白背景光LED的升壓DC/DC轉(zhuǎn)換器,一個大功率電荷泵,一個ADC,13個電流沉,LED功能測試,一個兩線串行接口和控制邏輯.
 
AS3676主要特性:

High-Efficiency Step Up DC/DC Converter

- Up to 26V/50mA for White LEDs

- Programmable Output Voltage with External Resistors and Serial Interface

- Over voltage Protection

High-Efficiency High-Power Charge Pump

- 1:1, 1:1.5, and 1:2 Mode

- Automatic Up Switching (can be disabled and 1:2 mode can be blocked)

- Output Current up to 400mA/500mA pulsed

- Efficiency up to 95%

- Very Low effective Resistance (2.5Ω typ. in 1:1.5)

- Only 4 External Capacitors Required:

2 x 1μF Flying Capacitors, 2 x 2.2μF Input/Output Capacitors

- Supports LCD White Backlight LEDs, or RGB LEDs

13 Current Sinks

- All 13 current sinks fully Programmable (8-bit) from: 0.15mA to 38.5mA (up to 75.6mA for
CURR30...CURR33)

- Three current sinks are High Voltage capable (CURR1, CURR2, CURR6)

- Programmable Hardware Control (Strobe, and Preview or PWM)

- Selectively Enable/Disable Current Sinks

- Dynamic Luminance Scaling (DLS) support to improve backlight operating time (can adjust any current source)

- Light Sensor input with internal hardware processing to control backlight according to ambient light using 3 groups - any current source can select one of the groups or no light sensor control

Internal PWM Generation

- 8 Bit resolution

- Autonomous Logarithmic up/down dimming

Led Pattern Generator

- Autonomous driving for Fun RGB LEDs

- Support indicator LEDs

10-bit Successive Approximation ADC

- 27μs Conversion Time

- Selectable Inputs: VANA/GPI, GPIO1/DLS, GPIO2/LIGHT, all current sources, VBAT, CPOUT, DCDC_FB

- Internal Temp. Measurement

- Light Sensor input with Java support (JSR-256): read ADC processed value

Support for automatic LED testing (open and shorted LEDs can be identified)

Strobe Timeout protection

- Up to 1600ms

- Three different timing modes

Two General Purpose Inputs/Output

- GPIO1/DLS, GPIO2/LIGHT

- Digital Input, Digital Output using VANA/GPI supply and Tristate

- GPIOs Programmable Pull-Up/Down

Programmable LDO

- 1.8 to 3.35V, 150mA

- Programmable via Serial Interface

Standby LDO always on

- Regulated 2.5V max. output 10mA

- 3μA Quiescent Current

Audio can be used to drive RGB LED(s)

- Color and Brightness depends on audio amplitude

Wide Battery Supply Range: 3.0 to 5.5V

Two Wire Serial Interface Control

Over current and Thermal Protection

WL-CSP30 3x2.5mm, 0.5mm pitch Package

AS3676應用:

Power- and lighting-management for mobile telephones and other 1-cell Li+ or 3-cell NiMH powered devices.


圖1.AS3676方框圖

圖2.AS3676模擬LDO方框圖

圖3.AS3676升壓DC/DC轉(zhuǎn)換器方框圖:電流反饋和過壓保護

圖4.AS3676升壓DC/DC轉(zhuǎn)換器詳細方框圖

圖5.AS3676環(huán)境光傳感器內(nèi)部電路圖

圖6.AS3676 GPIO和VANA/GPI方框圖

圖7.AS3676 LED功能測試電路圖

圖8.AS3676自動控制LED內(nèi)部電路圖
外接元件列表:

此內(nèi)容為AET網(wǎng)站原創(chuàng),未經(jīng)授權禁止轉(zhuǎn)載。
主站蜘蛛池模板: 亚洲精品伊人久久久久| 被滋润的艳妇疯狂呻吟白洁老七| 美女黄网站人色视频免费国产| 1819sextub欧美中国| 波多野结衣新婚被邻居| 国产精品亚洲精品日韩电影| 伊人色综合久久天天人手人婷| 538在线视频| 91精品欧美一区二区三区| 欧美性videos高清精品| 国产大片线上免费看| 丁香六月综合网| 欧美视频免费在线| 国产四虎精品8848hh| どきどき小房东| 欧美在线色视频| 国产一区在线视频| 99久久精品美女高潮喷水| 日韩视频在线免费| 全免费A级毛片免费看网站| 在线观看你懂得| 无码午夜人妻一区二区不卡视频| 伊人免费在线观看| 野花社区视频www| 壮汉紫黑粗大好深用力| 亚州日本乱码一区二区三区| 练瑜伽的时候进入| 国产精品手机在线亚洲| 中文字幕精品久久久久人妻| 波多野结衣午夜| 又大又硬一进一出做视频| 400部国产真实乱| 无码人妻久久一区二区三区免费丨 | 看全色黄大色大片免费久久 | 天下第一社区视频welcome| 亚洲av第一网站久章草| 美女露内裤扒开腿让男生桶 | 中文在线天堂网| 欧美国产综合在线| 做a的视频免费| 综合91在线精品|