TCA6507集成电路（IC）的LED驱动器规格书PDF中文资料

TCA6507属于集成电路（IC）的LED驱动器。由德州仪器制造生产的TCA6507LED 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。

1 Features

1• Seven LED Driver Outputs: ON, OFF, Blinking,

Fading at Programmable Rates

• Open-Drain Outputs Directly Drive LEDs to

40-mA Maximum

• Two Independent Banks of LED Drivers

• Widely Programmable Blink Rates, Fade-ON and

Fade-OFF Rates and Maximum Intensity

• Outputs Not Used as LED Drivers Can Be Used

as Regular General-Purpose Open-Drain Outputs

• 16 Steps of Maximum Intensity Control from

Fully-OFF to Fully-ON States

• Smooth Perceived Transitions for Fade-ON and

Fade-OFF

• Operating Power-Supply Voltage Range of

1.65 V to 3.6 V

• 5.5-V Tolerant Open-Drain Outputs

• Low Standby Current With Shutdown Capability

for Additional Power Savings

• Programmed Through I2C Bus Interface Logic

Compatible With SMBus

• No Glitch on Power Up

• ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

• Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

2 Applications

• Mobile Phones

• Desktop and Laptop Computers

• Human Machine Interface

3 Description

This 7-bit LED dimmer for the two-line bidirectional

bus (I2C) is designed to control (or dim) LEDs through

the I2C interface. Without this device, the

microcontroller must be actively involved in turning on

and off the LEDs (per the required dimming rate),

which uses valuable processor time. The TCA6507

alleviates this issue by limiting the number of

operations required by the processor in blinking LEDs

and helps to create a more efficient system. The

TCA6507 handles all pulse width modulation (PWM)

logic, allowing the processor to use its cycles for

more important tasks.