TIDA-00555: want a power supply for AMC1100 without a transformer

Damith Pavithra

Part Number: TIDA-00555
Other Parts Discussed in Thread: AMC1100, , DCH010505S

I am trying to build a current and voltage sensor for an inverter, using the mentioned TI design. In the design, power supply for the sensing circuit is designd with a transformer which is hard to find. All the solutions i found, had this transformer. I want a power supply design without a transformer. Can you please give me a design. It requires dual supply with +5V 0V -5V . I saw that there are some miniature 1W, 2W DC/DC isolated converters. Are there any way to use this miniature DC DC converters for powering the hot side of the AMC1100. Thank you

over 6 years ago

0 Kallikuppa Sreenivasa over 6 years ago

TI__Guru*** 147159 points

Hello Damith Pavithra

Thanks for the mail and considering TIDA-00555.

For sensing current and voltage miniature 1W, 2W DC/DC isolated converters is a good option.

Alternatively you could use

www.ti.com/.../TIDA-01094

for generating the isolated power supply and

http://www.ti.com/tool/TIDA-00777

For generating the negative supply.

Thanks

0 Damith Pavithra over 6 years ago in reply to Kallikuppa Sreenivasa

Expert 1125 points

Thank you for the response. I looked into the two designs you provided. Unfortunately they are not to fulfill my requirements. In this designs, power supply for hot side is supplied from the mains. This is not suitable because inverter should run without mains supply. I want power them from the 5V side with a isolating power supply. and it should be a dual supply because designed circuit should be supplied with a dual +5V 0 -5V supply. Can you please give me a solution with isolated DC/DC supply which can be powered from the low side.
Thank you