Hello Everyone,
I designed a Bidirectional Buck-Boost Converter and I would like to know what type of opto gate driver is best for my circuit and how to use it. It is my first time with this type of component.
I'm using a Arduino Nano to control the PWM, remembering that the maximum current that passes through the inductor is 1 A and my capacitators have a capacitance of 3300.
IGBT - STGF10NB60SD.pdf (427 KB)
No power connections in your circuit - I presume its meant to be a half-H-bridge?
Why opto gate driver? High voltage? What voltage? Would a high voltage non-isolated gate
driver be usable?
high-voltage IGBTs' gates need 15V at 100's of mA drive typically, so you'll require a floating
15V supply for the high side driver anyway. Without high current gate drive the switching losses
with a DC-DC converter will be large.
There are some PV-output photo isolators but they tend to only output 8V or so and aren't high
current for rapid switching - basically good for low voltage MOSFET driving such as in SSRs.
A capacitance of 3300 is way beyond plausible. Please explain your circuit voltages, power level,
operating frequency and actual component values in proper units...
MarkT:
No power connections in your circuit - I presume its meant to be a half-H-bridge?Why opto gate driver? High voltage? What voltage? Would a high voltage non-isolated gate
driver be usable?high-voltage IGBTs' gates need 15V at 100's of mA drive typically, so you'll require a floating
15V supply for the high side driver anyway. Without high current gate drive the switching losses
with a DC-DC converter will be large.There are some PV-output photo isolators but they tend to only output 8V or so and aren't high
current for rapid switching - basically good for low voltage MOSFET driving such as in SSRs.A capacitance of 3300 is way beyond plausible. Please explain your circuit voltages, power level,
operating frequency and actual component values in proper units...
I choose to use a opto gate driver to protect the Arduino, because I am working with a "high capacitators". There is not a requeriment, use a opto gate driver.
Basically, my circuit has a PID Controller that will control the current in the inductor. Both of my capacitator has Max. Voltage of 3.8 V and Minimum 2.4 V.
L = 4.3 e-3
IGBT - STGF10NB60SD
Thanks for your help!
IGBTs aren't for low voltage, they come into their own around 100 to 400V. For 3V or so a MOSFET is needed.
IGBTs waste a couple of volts or so....