maxim 公司的max15054是高邊n溝mosfet驅動器,由cmos邏輯電平控制,從輸入到輸出的傳輸延遲為12ns,輸入電壓高達60v,峰值源和吸電流為2a,主要用于單串和多串hb led驅動器,dc/dc轉換器的高邊驅動器和led背光驅動器.本文介紹了max15054主要特性,方框圖和應用電路.

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

應用:

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

圖1.max15054方框圖

圖2.max15054應用電路圖