s_cihan_tek
Full Member level 2
Hi all,
I want to build a simple 0-20V variable output DC-DC converter with a max current rating of 1A. It's output voltage will be adjusted according to its output current by using a look-up table.
Since the converter will supply low currents, it'll operate in discountinuous conduction mode.
I have 2 questions:
1 - I don't know how to calculate the output inductor and capacitor value when the output voltage isn't constant and operation mode is discontinuous.
All of the calculations i've seen use the minimum output voltage and ripple for continuous conduction mode as input.
2- What's the best way to regulate the output voltage according to a I-V lookup table? Would using a microcontroller,DSP etc. to create a PWM and vary the duty cycle according to the current and voltage values coming from its ADC suffice? The response time shouldn't be very long.
Thanks in advance.
I want to build a simple 0-20V variable output DC-DC converter with a max current rating of 1A. It's output voltage will be adjusted according to its output current by using a look-up table.
Since the converter will supply low currents, it'll operate in discountinuous conduction mode.
I have 2 questions:
1 - I don't know how to calculate the output inductor and capacitor value when the output voltage isn't constant and operation mode is discontinuous.
All of the calculations i've seen use the minimum output voltage and ripple for continuous conduction mode as input.
2- What's the best way to regulate the output voltage according to a I-V lookup table? Would using a microcontroller,DSP etc. to create a PWM and vary the duty cycle according to the current and voltage values coming from its ADC suffice? The response time shouldn't be very long.
Thanks in advance.