If I understod you correctly, you need an DC-DC converter as a current source ?
Just put a serial resistor with your load and feed voltage drop on it to the control of the converter.
Use RC filter to slow down the change of the voltage.
There are alot of textbook discuss about voltage mode dc-dc converter. You can refer the datasheet of XC6368(Torex company). That is a voltage mode dc-dc converter so you can find out some thing. I think that the most advantage of voltaage mode control is its simple structure. Howerver the stability problem is really difficult because of the double poles of the output LC filter.
Goodluck!
A voltage mode is simple to design but harder to compensate because stability during the DCM n CCM mode.. the current mode control is 1 lesser pole which made the system more stable...
I need some information about voltage mode control for my FYP (IC design). This chip is for boost converter driving white LEDs connected in series. My professor suggested our group to use voltage model control + PWM for the sake of simple design.
Any good books or document or link related to voltage mode control would be very appreciated. Thank you in advance ~