This Led driver circuit schematic is based on the LT3760 8-channel LED driver circuit which is a step-up DC/DC controller capable of driving up to 45V of LEDs.
Each channel of LT3760 contains an accurate current sink with ±2%
current matching. Output current for each channel can be programmed from
20mA to 100mA per string but for higher output LED current the channels
can be paralleled .
The PWM dimming allowed by LT3760 is up to 3000:1 and an analog dimming
range up to 25:1. The operating frequency can be programmed from 100kHz
up to 1MHz using a resistor or an external clock .
The LT3760 LED driver circuit schematic is very simple and require
few external components offering high efficiency and other many features
like : 8-Channel LED Driver , wide input range : 6V to 40V , ±2% LED
Current Matching at 40mA , up to 3000:1 True Color PWM™ Dimming Range ,
single Resistor Sets LED Current (20mA to 100mA) , protection for LED
Pin to VOUT short , Parallel Channels for Higher LED Current ,
programmable LED current derating vs temperature , programmable
frequency (100kHz to 1MHz) , synchronizable to an external clock .
The LT3760 can be used in many applications where is needed a high efficiency LED driver.
As you can see in the schematic circuit bellow is presented a 13W Driver
1MHz SEPIC, 8 Strings, 100mA Per String . If you want to use LT3760
please read the manufacturer datasheet .Electronics Circuit Application
Saturday, September 7, 2013
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