An integrated company launched 16 channel LED driver 55V Buck Controller

(Linear Technology Corporation) technology company launched an integrated 16 channel LED driver LT3745 55V buck controller. The LED driver is powered up to 75mA LED for each channel and can drive up to 36V series LED, making the device very suitable for applications such as large LED billboards. Each channel has a separate 6 bit correction current regulator and a 12 bit gray level PWM dimming. Coupled with a 0.5 s minimum LED turn-on time, the LT3745 provides very wide dynamic contrast. Point correction and gray level can be obtained through a serial interface in the TTL/CMOS logic circuit. LT3745 input voltage range of 60V to 55V is very suitable for commercial and industrial design in a wide input power range, typically between 12V and 48V. The least external components coupled with the 6mm x QFN 6mm package for multi-channel LED applications to provide a highly compact solution for the board area.

The LT3745's internal buck controller produces a slightly higher adaptive bus voltage than the parallel LED string to provide over 90% efficiency. 16 separate linear current absorbers are regulated and modulated for each of the LED strings, which can provide a wealth of functionality in a compact solution to account for board area. LT3745 performs a comprehensive diagnosis and protection function for open / short circuit LED and overtemperature faults, and the fault status is transmitted through the serial data interface. 30MHz full buffer, conversion rate balance, a cascade of serial data interface makes LT3745 very suitable for large screen LCD dynamic backlight and full-color LED display.

LT3745EUJ 6mm x 6mm with 40 lead QFN package, 1000 purchase price of $4.95 per piece. Extended temperature version or I version of LT3745IUJ has also been supply, 1000 purchase price of $5.45 per piece. All versions are available from stock. For more information, please log in to www.linear.com.cn/product/LT3745.

Photo caption: 16 channel, 50mA LED driver

Performance overview: LT3745

- 6V to 55V power input voltage range

16 independent LED - output up to 75mA/36V

LED current - with + 3% in 50mA matching (typically + 1%)

6 - site correction current regulation

- 12 bit grayscale PWM dimming

- 0.5 s LED on the shortest time

- adaptive LED bus voltage to achieve high efficiency

30MHz serial data interface - cascadable

Diagnosis and protection - Comprehensive: individual open / short circuit and overheating fault LED

6mm x 6mm - 40 lead QFN package

- 16 channel 50mA buck LED driver

An introduction

Linear Technology Corporation (Linear Technology Corporation) is a member of the S&P 500 index, in the past 30 years, the high performance analog integrated circuit has been committed to the design, the main company of global manufacturing and sales of broad categories. The product is an established world we live analog and digital electronic indispensable bridge, including the application of the field of communication, network, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear technology manufactures include power management, data conversion, signal conditioning, RF and IC, and an Module interface subsystem.

LT, LTC, LTM, Module and is a registered trademark of linear technology corporation. All other trademarks are the property of their respective owners.