ltr3596主要特性:
n 300ma buck regulator, drives up to 10 leds per channel with fast npn current sources
n fast current sources for <1μs pulse widths (10,000:1 true color pwm™ dimming at 100hz)
n leds disconnected in shutdown
n adaptive vout for increased efficiency
n 6v to 60v input voltage range
n ±1.5% accurate led current matching
n external resistors set led current for each channel
n requires no external compensation
n programmable switching frequency (200khz to 1mhz)
n synchronizable to external clock
n open, short led detection and reporting
n programmable led thermal derating and reporting
n programmable temperature protection
n 5mm 8mm thermally enhanced qfn package with
0.6mm high voltage pin spacing
ltr3596应用:
n led billboards and signboards
n mono, multi, full color led displays
n large screen display led backlighting
n automotive, industrial and medical displays
图1.ltr3596方框图
图2.ltr3596典型应用:48v 降压8w 100ma led驱动器
图3.ltr3596典型应用:24v 降压4w 100ma led驱动器
图4.ltr3596典型应用:12v 降压100ma 单象素rgb驱动器
图5.ltr3596典型应用:48v 降压10w 100ma led驱动器
