CAV4201中文资料LED Driver, Buck Converter, 350 mA数据手册ONSEMI规格书

描述 Description

The CAV4201 is a high efficiency step-down converter optimized to drive high current LEDs. A patented switching control algorithm allows highly efficient and accurate LED current regulation. A single RSET resistor sets the full scale LED string current up to 350 mA from supplies as high as 36 V. The switching architecture of the CAV4201 results in extremely low internal power dissipation allowing the device to be housed in a tiny package without the need for dedicated heat sinking. The device is compatible with switching frequencies of up to 1 MHz, making it ideal for applications requiring small footprint and low value external inductors. Analog dimming and LED shutdown control is provided via a single input pin, CTRL. Additional features include overload current protection and thermal shutdown.

特性 Features

• Power Efficiency up to 94%
• Smaller, more efficient alternative to linear regulators for driving high-brightness LEDs in step-down applications.
• LED Drive Current up to 350 mA
• Compatible with 12 V and 24 V Standard Systems
• Handles Transients up to 40 V
• Single Pin Control and Dimming Function
• Drives LED Strings of up to 32 V
• Open and Short LED Protection
• Parallel Configuration for Higher Output Current
• CAV Prefix for Automotive and Other Applications requiring Site and Change Control

应用 Application

• 12 V and 24 V Lighting Systems
• High Brightness 350 mA LEDs
• Automobiles and Aircraft

简介

CAV4201属于集成电路（IC）的LED驱动器。由制造生产的CAV4201LED 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。