AP3156中文资料low-voltage-dc-dc-led-drivers数据手册Diodes规格书

描述 Description

The AP3156 is a 6-channel low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency in white LED applications. The AP3156 is capable of driving 6 LED channels at a combined maximum of 120mA from a 2.7V to 5.5V input. The current sink outputs may be operated individually or in parallel for driving higher-current LEDs. A low external parts count (two 1μF flying capacitors and two small 1μF capacitors at VIN and VOUT) make this part ideally suited for small, battery-powered applications. The AP3156's serial digital input is used to enable, disable and set current for each LED with a 32-level logarithmic scale plus four low-current settings down to 50μA for optimized efficiency, with a low quiescent current of only 50μA.

应用 Application

Color (RGB) Lighting
Programmable Current Sinks
White LED Backlighting
Keypad illumination
Small LCD screen backlighting
White Photo Flash for Digital Still Cameras

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\t\t\t\tProduct Specifications

简介

AP3156属于集成电路（IC）的LED驱动器。由制造生产的AP3156LED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。