CAT9532数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The CAT9532 is a CMOS device that provides 16-bit parallel input/output port expander optimized for LED dimming control. The CAT9532 outputs can drive directly 16 LEDs in parallel. Each individual LED may be turned ON, OFF, or blinking at one of two programmable rates. The device provides a simple solution for dimming LEDs in 256 brightness steps for backlight and color mixing applications. The CAT9532 is suitable in I2C and SMBus compatible applications where it is necessary to limit the bus traffic or free-up the bus master's timer.The CAT9532 contains an internal oscillator and two PWM signals that drive the LED outputs. The user can program the period and duty cycle for each individual PWM signal. After the initial set-up command to program the Blink Rate 1 and Blink Rate 2 (frequency and duty cycle), only one command from the bus master is required to turn each individual open drain output ON, OFF, or cycle at Blink Rate 1 or Blink Rate 2. Each open drain LED output can provide a maximum output current of 25 mA. The total current sunk by all I/Os must not exceed 200 mA.

特性 Features

• I/Os can be Used as GPIOs
• Suitable for control, or data transfer, and LED control
• 16 LED Drivers with Dimming Control
• 256 Brightness Steps
• 16 Open Drain Outputs Drive 25 mA Each
• 2 Selectable Programmable Blink Fates:- Frequency: 0.593 Hz to 152 Hz- Duty Cycle: 0% to 99.6%
• 400 kHz I2C Bus Compatible
• 2.3 V to 5.5 V Operation
• 5.0 V Tolerant I/Os
• Active Low Reset Input

应用 Application

• Backlighting
• RGB color mixing
• Sensors control
• Power switches, push-buttons
• Alarm systems

简介

CAT9532属于集成电路（IC）的LED驱动器。由制造生产的CAT9532LED 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。