LM3435 - Compact Sequential Mode RGB LED Driver with IC Control Interface

LM3435是TI德州仪器公司的一款LED照明-照明产品，LM3435是Compact Sequential Mode RGB LED Driver with IC Control Interface，本站介绍了LM3435的封装应用图解、特点和优点、功能等，并给出了与LM3435相关的TI元器件型号供参考。

LM3435 - Compact Sequential Mode RGB LED Driver with IC Control Interface - LED照明-照明 - LED驱动器 - 德州仪器

产品描述

The LM3435, a Synchronously Rectified non-isolated Flyback Converter, features all required functions to implement a highly efficient and cost effective RGB LED driver. Different from conventional Flyback converter, LEDs connect across the VOUT pin and the VIN pin through internal passing elements at corresponding LED pins. Thus, voltage across LEDs can be higher than, equal to or lower than the input supply voltage.

Load current to LEDs is up to 2A with voltage across LEDs ranging from 2.0V to 4.5V. Integrated N-Channel main MOSFET, P-Channel synchronous MOSFET and three N-Channel current regulating pass switches allow low component count, thus reducing complexity and minimize board size. The LM3435 is designed to work exceptionally well with ceramic output capacitors with low output ripple voltage. Loop compensation is not required resulting in a fast load transient response. Non-overlapping RGB LEDs are driven sequentially through individual control. Output voltage hence can be optimized for different forward voltage of LEDs during the non-overlapping period. I2C interface eases the programming of the individual RGB LED current up to 1,024 levels per channel.

The LM3435 is available in the thermally enhanced 40-pin WQFN package.

产品特性

Sequential RGB Driving Mode
Low Component Count and Small Solution Size
Stable with Ceramic and Other Low ESR capacitors, No Loop Compensation Required
Fast Transient Response
Programmable Converter Switching Frequency up to 1 MHz
MCU Interface Ready With I2C Bus
Peak Current Limit Protection for the Switcher
LED Fault Detection and Reporting via I2C Bus

Key Specifications

Support up to 2A LED current
Typical ±3% LED current accuracy
Integrated N-Channel main and P-Channel synchronous MOSFETs
3 Integrated N-Channel current regulating pass switches
LED Currents programmable via I2C bus independently
Input voltage range: 2.7 – 5.5 V
Thermal shutdown
Thermally enhanced WQFN package

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