CAT4008中文资料LED Driver, 8-Channel, Constant Current数据手册ONSEMI规格书

描述 Description

The CAT4008 is an 8 channel constant current driver for LED billboard and other general display applications. LED channel currents are programmed together via an external RSET resistor. Low output voltage operation on the LED channels as low as 0.4 V (for 2 to 100 mA LED current) allows for more power efficient designs.A high-speed 4-wire serial interface of up to 25 MHz clock frequency controls each individual channel using a shift register and latch configuration. A serial output data pin (SOUT) allows multiple devices to be cascaded and programmed via one serial interface. The device also includes a blanking control pin (BLANK) that can be used to disable all channels independently of the interface.Thermal shutdown protection is incorporated in the device to disable the LED outputs if the die temperature exceeds a set limit.

特性 Features

• 8 Constant current-sink channels
• Serial interface up to 25 MHz clock frequency
• 3 V to 5.5 V logic supply
• LED current range from 2 mA to 100 mA
• LED current set by external RSET resistor
• 300 mV LED dropout at 30 mA
• Thermal shutdown protection

应用 Application

• Billboard Display
• Marquee Display
• Instrument Display
• General Purpose Display

简介

CAT4008属于集成电路（IC）的LED驱动器。由制造生产的CAT4008LED 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。