Maxim MAX15054 LED驱动方案

Maxim 公司的MAX15054是高边N沟MOSFET驱动器,由CMOS逻辑电平控制,从输入到输出的传输延迟为12ns,输入电压高达60V,峰值源和吸电流为2A,主要用于单串和多串HB LED驱动器,DC/DC转换器的高边驱动器和LED背光驱动器.本文介绍了MAX15054主要特性,方框图和应用电路.

The MAX15054 is a high-side, n-channel MOSFET driver for high-voltage applications capable of switching at high frequencies. This device is controlled by a CMOS logic-level signal referenced to ground and features a very short (12ns, typ) propagation delay from input to output. The high-voltage operation and high source/sink-current capability make the MAX15054 ideal for HB LED drivers and DC-DC converters.

The MAX15054 is well suited to complement other Maxim LED driver products such as the MAX16814, MAX16838, MAX16833, MAX16834, and MAX16826. The MAX15054 adds a high-side driver to those products that include only a low-side driver; it then allows for buck-boost configurations for multistring drivers similar to the MAX16814, MAX16838, and MAX16826, and for buck-boost conversion with output referenced to ground for single-string drivers such as the MAX16834 and MAX16833.

The MAX15054 is available in the industry-standard 6-pin SOT23 package and operates over the -40℃ to +125℃ automotive temperature range.

主要特性:

Input Voltage on High-Side n-Channel MOSFET Up to 60V

Up to 13.5V Logic Input Independent of Supply Voltage

2A Peak Source and Sink Current

12ns Propagation Delay

Rise and Fall Times of 6ns while Driving 1000pF Capacitance

Low Input Capacitance

Low-Side and High-Side Undervoltage Protection

Allows Buck-Boost Topology Referred to Ground for LED Drivers and DC-DC Converters

Allows Buck-Boost Topology for Multistring LED Drivers

6-Pin SOT23 Package

应用:

HB LED Drivers for Single and Multiple Strings

High-Side Driver for DC-DC Converters (Buck, Buck-Boost, Half-Bridge, Full-Bridge)

LED Backlight Drivers

图1.MAX15054方框图

图2.MAX15054应用电路图