Capacitor charger with 24V input 40V output at 1A constant current

Question

Hi, 
 I want to design a circuit with 24VDC input and output is charging a 24mF capacitor with constant current 1Amp, 0 to 40Volts. 
 Is it possible to design this circuit with LT8391? 
 Thanks.

ADIApproved · Accepted Answer

Hi, 
 According to the datasheet, LT8391 is ideal for LED driver and battery charger applications. However, it did not specify applications related to capacitor or supercapacitor charging. Normally, you would need a precise control of charging current and voltage for supercapactior applications to prevent damage to the supercapacitor, controller, and input voltage source. You may need additional components along with the LT8391 such as an input current sense to prevent excessive overshoot of current during startup. I would suggest to use available off the shelf supercapacitor charger controllers like LTC3796 instead. You may refer to the link below for more details regarding supercapacitor chargers. Thank you. 
 Supercapacitor Chargers | Analog Devices 
 LT3796/LT3796-1 - 100V Constant-Current and Constant-Voltage Controller with Dual Current Sense (analog.com) 
 LT Journal of Analog Innovation V22N2 - July 2012 - Combined Voltage and Current Control Loops Simplify LED Drivers, High Capacity Battery/Supercap Chargers & MPPT Solar Applications 
 Regards, 
 Fritz)

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Capacitor charger with 24V input 40V output at 1A constant current