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LT3517,pdf,datasheet (Full-Fea
消耗积分:3 |
格式:rar |
大小:344 |
2010-04-12
刘满贵
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The LT3517 is a current mode DC/DC converter with an
internal 1.5A, 45V switch specifi cally designed to drive
LEDs. The LT3517 operates as a LED driver in boost, buck
mode and buck-boost mode. It combines a traditional
voltage loop and a unique current loop to operate as
a constant-current source or constant-voltage source.
Programmable switching frequency allows optimization of
the external components for effi ciency or component size.
The switching frequency of LT3517 can be synchronized
to an external clock signal. The LED current is externally
programmable with a 100mV sense resistor. The external
PWM input provides up to 5000:1 LED dimming. The CTRL
pin provides further 10:1 dimming ratio.
internal 1.5A, 45V switch specifi cally designed to drive
LEDs. The LT3517 operates as a LED driver in boost, buck
mode and buck-boost mode. It combines a traditional
voltage loop and a unique current loop to operate as
a constant-current source or constant-voltage source.
Programmable switching frequency allows optimization of
the external components for effi ciency or component size.
The switching frequency of LT3517 can be synchronized
to an external clock signal. The LED current is externally
programmable with a 100mV sense resistor. The external
PWM input provides up to 5000:1 LED dimming. The CTRL
pin provides further 10:1 dimming ratio.
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