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Kaustubh Kulkarni

Other Parts Discussed in Thread: UCD3138

Hello all,

A customer is looking for an IC for the following task,

I need to generate two PWM signals (frequency 6.78MHz, duty cycle 50%) that must be shifted by an amount programmable on-line by the user (the chip will be interfaced with a micro-controller and must be programmed on-line). The PWM shift resolution (minimum shift between the two signals) must be at least 18-20 steps between 0° (signals in phase) and 180° (signals in opposite phase). I need to find an IC suitable for this task.

Could anyone help me with this?

Thank you in advance.

over 8 years ago

0 Brian Johnson96 over 8 years ago

TI__Expert 3200 points

Hi Kaustubh,

This thread in the "AC/DC and Isolated DC/DC Power Forum"made it to the Off-line and Isolated DC-DC BU and I do not have a solution specific to your requirements. It seems to me that maybe a micro would be able to meet your requirements. I will redirect this to the MSP forum to see if there are any ideas there to help.

0 Samuel Jaffe over 8 years ago in reply to Brian Johnson96

TI__Mastermind 25590 points

Kaustubh,

If the MSP team does not have a part for the job, you can look into UCD3138. This is our digital power controller which offers high frequency, high resolution digital PWM which can probably meet these specs. We can probably get it microcontroller-controlled, but the UCD parts will probably be more expensive than an MSP. If the MSP team does not have a part for you, we can take a look at UCD3138.

-Sam

0 Samuel Jaffe over 8 years ago in reply to Samuel Jaffe

TI__Mastermind 25590 points

Kaustubh,

Just checking in - have you found the part you're looking for?

-Sam

0 Kaustubh Kulkarni over 8 years ago in reply to Samuel Jaffe

TI__Intellectual 1040 points

Hello Sam,

Sorry for the late reply.
Thank you for the answer.

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