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Don't you need to discharge the capacitor bank with the maximum amount of energy into the resistor? To maximise your energy transfer from the capacitor you need your switch to turn-on quickly.
See this **broken link removed**.
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Otherwise use a 1200V IGBT such as here
Do you need to do this in a very short period of time? Say nanosecond time period and delivery a very high peak current. If so, look at avalanche transistors and string them together in series.
I am designing a circuit to charge 4V battery cells from PV solar panel. The peak current will be about 300mA. The charging cycle is being controlled by a dedicated uC. My question is what is a good load switch (MOSFET, BJT, dedicated load switch) for this circuit?
When the battery cells are...
Are you trying to calculate the power losses in the IGBT switch itself? If so split it into these two parts:
1. Switching losses (Psw)
2. Conduction power loss (Pon)
The switching losses can be estimated as:
Psw = 0.5 x Vce x Ice x (tr + tf) x Fsw
Vce = measured voltage across switch in off...
I like SIMetrix software, which you can download here
I use the free demo software that is not time limited and does 140 nodes. Can be used for commerical or non-commercial needs.
I find that I can simulate bi-directional current flow in battery charging circuit with inductors added in...
depends what you are designing and what it needs to fit inside or on?
For instance if you designing the lowest possible Rds(on) Power MOSFET chip to fit inside a DPAK package, then you may want it to be the maximum size of the pad that it will attached to. That could be square or rectangle...
Yes. The MOSFET gate is like a capacitor and when the MOSFET is off it has no charge on the gate. To turn it on, you apply a voltage between gate-source and this charges the gate capacitance. Current flows into gate capacitor until it has reached the voltage potential. This enhances the channel...
It is called the free market and competition. Ultimately you see that someone else has good business at you guestimate 60% margin. You think, I know we can do that to and make a copy part to their spec and sell it at a lower price to take market share. Now the copy part is never the same as the...
Simply that inductors don't like current flow being changed. Much like capacitors try to maintain the same voltage level.
For example you have a coil of wire (inductor) and you pass 1 amp through it. Then you disconnect the flow of current with a switch. Now the inductor tries to keep that...
For wireless charging, you want to operate at a higher frequency to allow small component sizes, 200kHz is good. Look for the wireless charging standards like Qi and you'll find chips for transmitting and receiving.
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http://uk.mouser.com/m_new/vishay/vishaydaleiwas/
For bi-directional current flow. You use them generally as a load switch and it allows very low conduction losses in either direction when on. Then when you turn it off, it blocks in both directions, as you have the inherent drain-source body diode back to back. Otherwise called a bat fet for...
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