This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
I'm looking for a PWM controller (or a different solution) for a half bridge in a switched mode power supply (~500 kHz) which can provide a different dead time between the transistion Low -> High and High->Low. All controllers or drivers I found yet just provide the same deadtime for the two transistions.
As an alternative I'm thinking to work with delay elements.
Thanks for your help!Valentin
The LM5105, www.ti.com/.../samplebuy bridge&tisearch=Search-EN-Everything, is a half bridge driver with programmable dead-time but they are symmetrical.
Our latest half bridge controller is the LM5036 again I don't think it has the different dead time between the transistion Low -> High and High->Low, .
The UCC28250/1 is another recent half bridge controller,
For the asymmetrical deadtime you may have to go down the route of implementing discrete delays.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Peter Meaney:
Thanks for you answer!I will try to realize it with delays. Any suggestions for adjustable delay components?
In reply to Valentin Zeller:
I have used simple asymmetrical delay networks to slow turn-on and for faster to off.
Turn on is through an RC circuit, the C is maybe some 10's of pF or cap across the gate soucre of the mosfet and turn-off is through a diode with maybe a series resistor which are in parallel with the R in the RC circuit.
I hope this helps.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.