AAT3170

AAT3170

  • 厂商:

    ANALOGICTECH(研诺)

  • 封装:

  • 描述:

    AAT3170 - High Current LED Flash Driver Charge Pump IC - Advanced Analogic Technologies

  • 详情介绍
  • 数据手册
  • 价格&库存
AAT3170 数据手册
PRODUCT DATASHEET AAT3170 ChargePumpTM General Description The AAT3170 is a high output current, high efficiency, low noise, low profile charge pump DC/DC converter, ideal for multi-function LED photo-flash applications where solution cost, size, and efficiency are critical. The dual charge pump in the AAT3170 is capable of delivering 600mA output current. Two current-controlled paths are available for users of dual flash LEDs that prefer current matching. Each LED channel can be easily programmed in 32 steps with a single GPIO output through the AS2Cwire™ (Advanced Simple Serial Control™) interface. This allows smooth transitions and flexible adjustment of brightness in flash or other lighting modes. The tri-mode (1X/1.5X/2X) operation of the internal charge pump offers excellent power efficiency for both flash and movie modes. Combined with a low external parts count (two 1μF flying capacitors and one small bypass capacitor at VIN and OUT), the AAT3170 is ideally suited for small, battery-powered applications. The AAT3170 has a thermal management system to protect the device in the event of a short-circuit condition at the output pin. Built-in soft-start circuitry prevents excessive inrush current during start-up. The shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1.0μA. The AAT3170 is available in the Pb-free, thermallyenhanced, 12-pin 3x3mm TDFN package. High Current LED Flash Driver Charge Pump IC Features • • • • • • • • • • • • • • VIN Range: 2.7V to 5.5V 600mA Output Current Tri-Mode 1X/1.5X/2X in Current Mode Voltage Mode Operation: 1.5X, 200mA Dual Regulated Current Sinks Current Match Between Current Sinks 32 Current Steps Set by AS2Cwire 1μF Input, Output, and Flying Capacitors
AAT3170
1. 物料型号: - 型号:AAT3170 - 封装:TDFN33-12

2. 器件简介: - AAT3170是一款高输出电流、高效率、低噪声、低配置的电荷泵DC/DC转换器,适用于多功能LED闪光灯应用,这些应用对解决方案的成本、尺寸和效率至关重要。

3. 引脚分配: - VIN(1,12):输入电源引脚,需要连接4.7μF或更大的陶瓷旁路电容至地。 - C1+(2):飞行电容C1正极。 - C1-(3):飞行电容C1负极。 - GND(4):地连接。 - F1(5):电流汇输入#1。 - F2(6):电流汇输入#2。 - EN/SET(7):AS2Cwire串行接口控制引脚。 - CT(8):闪光灯计时控制电容输入。 - C2-(9):飞行电容C2负极。 - C2+(10):飞行电容C2正极。 - VOUT(11):电荷泵输出,需要连接2.2μF或更大的陶瓷电容至地。 - EP:暴露的船桨(底部);直接连接至芯片下方的地。

4. 参数特性: - 输入电压范围:2.7V至5.5V。 - 输出电流:高达600mA。 - 三模式(1X/1.5X/2X)操作。 - 双调节电流汇。 - 通过AS2Cwire接口进行32级电流设置。 - 关闭时的静态电流小于1.0μA。 - 工作温度范围:-40°C至+85°C。

5. 功能详解: - AAT3170包含两个可编程恒流汇,用于集成闪光灯电路控制。 - 三模式电荷泵结构优化了功率转换效率。 - 包含软件可编程定时器功能,用于自动调整闪光灯的开启时间。 - 通过AS2Cwire串行接口进行控制,每个恒流汇可以独立编程,具有16个电流级别。

6. 应用信息: - 适用于手机、数字相机、PDA、笔记本电脑和智能手机等设备。 - 具有热保护电路,在输出引脚短路时关闭电荷泵。 - 具有恒压输出模式设置,适合驱动LED并提供恒定的4.5V输出,适用于键盘照明、状态照明等应用。

7. 封装信息: - AAT3170采用无铅、热增强的12引脚3x3mm TDFN封装。
AAT3170 价格&库存

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