Since the gate drive signal is not perfectly rectangular, it will have sharp triangular pulses at such low duty-cycle ratios. Jellybean parts are strongly preferred, because in my country the electronic parts stores carry very little selection, the postal service takes 4 months to deliver any import even letters! Email Required, but never shown. Perhaps you can mitigate your voltage limit fears with a fast comparator circuit that disables gate drives if it sees anything outside V for example. A PWM input selectively disables the clock generator from providing the clock signal to the transformer primary.
| Uploader: | Mugar |
| Date Added: | 1 October 2011 |
| File Size: | 63.49 Mb |
| Operating Systems: | Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X |
| Downloads: | 18899 |
| Price: | Free* [*Free Regsitration Required] |
I am not new to SMPS design. It has been illustrated that the clock signal is generated isolater a dual flip-flop. The apparatus of claim 1, wherein said transistor means comprises a Metal Oxide Semiconductor Field Effect Transistor device.
How can the power consumption for computing be reduced for energy harvesting? The supply voltage to the half bridge is 50V.
EP1143619A3 – Semiconductor switch driving circuit – Google Patents
A second resistor 52 is connected across the gate 44 and source Driver circuit for controlling elements with capacitive control characteristics. I then built a test setup using an IRS, driving its two inputs exactly in opposite phase. The apparatus of claim 9, wherein said full wave rectifier means comprises a pair of diodes, an anode terminal of a first one of said pair of diodes being connected to a first end of said transformer secondary winding, a cathode terminal of said first one of said pair of diodes being connected to a first terminal of said transistor means, an anode terminal of a second one of said pair of diodes being connected to a second end of said transformer secondary winding, a cathode terminal of said second one of said pair of diodes being connected to said first terminal of said transistor means.
The driver boards you mention there are pretty comparable to what I’m trying to come up with, except transformwr mine have lower requirements in voltage and power, but higher speed requirements. Providing a supply voltage for a driving circuit of transfomer semiconductor switching element.
When I make printed circuits at home, I can also make them fine enough for these parts, but not for those 0. Expected minimum output voltage is 0. That is, the ON time of the duty cycle is determined when the clock generator is enabled to provide the clock signal to the primary.
Each board had local UVLO, and de-sat detect in case another device went transfirmer.
I need a 30kHz signal bandwidth. But they are not available in every isoalted one might need, and sometimes the UVLO threshold they have is unsuitable.
If you have feedback and duty control this won’t matter. Instead the HCPL is very slow, compared to the others!
Thus, with zero voltage applied to the transformer primary, there is zero voltage at the transformer secondary and at the MOSFET gate. Sign up or log in Sign up using Google.
Heat sinks, Part 2: Electronic logic driver circuit utilizing mutual induction between coupled inductors to drive capacitive loads with low power consumption.
High side driving with 0 to % duty cycle
I’m grateful for any good idea! It can all be done, cycke the resulting circuit is more complex and far less elegant than I would like. I’m planning that it will be around kHz. The apparatus of claim 9, wherein said means for providing a pair of square wave signals comprises a pair of flip-flops.
USA – % duty cycle, transformer isolated fet driver – Google Patents
I’m working on an adjustable 0. DE DET1 en That circuit is working reasonably well, although some improvement is still possible. A secondary winding 36 duyy the transformer 34 is connected through two diodes 38,40 configured as a full wave centertap rectifier. The apparatus of claim 1, wherein said clock means transformet a pair of flip-flops responsive to said clock signal. Pulse width modulation control circuit with a variable zero to one hundred percent duty cycle.
By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.
The very reason why I’m building this from scratch is that I couldn’t find ICs with enough performance, even for the individual blocks!
