CAT4109数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The CAT4109 is a 3-channel constant-current LED driver, requiring no inductor. LED channel currents up to 175 mA are programmed independently via separate external resistors. Low output voltage operation of 0.4 V at 175 mA allows for more power efficient designs across wider supply voltage range. The three LED pins are compatible with high voltage up to 25 V supporting applications with long strings of LEDs.Three independent control inputs PWM1, PWM2, PWM3, control respectivelly LED1, LED2, LED3 channels. The device also includes an output enable (OE) control pin to disable all three channels independently of the PWMx input states.Thermal shutdown protection is incorporated in the device to disable the LED outputs whenever the die temperature exceeds 150°C.

特性 Features

• 3 independent current sinks up to 175 mA rated 25 V
• LED current set by external low power control resistors
• Individual PWM control per channel
• Low dropout current source (0.4 V at 175 mA)
• Output Enable input for dimming
• 'Zero' current shutdown mode
• 3 V to 5.5 V logic supply
• Thermal shutdown protection

应用 Application

• LCD Backlighting
• Architectural Lighting

简介

CAT4109属于集成电路（IC）的LED驱动器。由制造生产的CAT4109LED 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。