Looking for LED driver for 100W 70-75V 2A LED from 9-12V sourc

Question

My LED specifications are: Size: 34*34*1.0mm Power: 100W Current: 2A Voltage: 70-75V Peak Irradiance: 8W/cm2 Viewing Angle: 60 degree Chips Arrays: 40 chips, 20 in Series 2 in Parallel 
 I have searched it out LT3755 and LT3956 but need some expert opinion.

KSz · Accepted Answer

Hello Burhan, 
 The LT3756-2 is the correct IC for you. 
 You need to run at low switching frequency to limit high voltage switching losses. I recommend as low as possible. 
 The current will get rather high, so a large catch diode for high current and high voltage is going to be needed. 10A, 100V. 
 I see that 75V 2A is 150W, but you need a 100W LED driver. There is a bit of a contradiction there. 
 Either way, you need the high voltage performance of the LT3756-2. 
 Good luck, 
 KSz

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Looking for LED driver for 100W 70-75V 2A LED from 9-12V sourc

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