Power isolation solution

Hailey Chen

Intellectual 1350 points

Other Parts Discussed in Thread: SN6507

Hi, team:

I want to design a system with isolation power, Could you help suggest suitable device and solution?

technical need:

Vin =20V

Vout =+5.5V, +4.2V -5.5V,

Each output current within 1A,

Could you help suggestion suitable device could support? Smaller size, lower ripper will be more appreciate.

Hope to get your reply, thanks a lot.

over 1 year ago

0 Koteshwar Rao over 1 year ago

TI__Mastermind 49545 points

Hi Hailey,

Thanks for reaching out.

One solution you could think of is using SN6507. The device supports 0.5A input current and hence, the max input power would be limited to 10W when input voltage is 20V. This means that you could have approximately 8W of output power under worst-case conditions. If this meets customer power / current requirements, then they could consider this device.

I will also notify power supply product group about your request to see if they have any other device suggestions, thanks.

Regards,
Koteshwar Rao

0 Hailey Chen over 1 year ago

TI__Intellectual 1350 points

Hi, Rao：

Very thanks for your suggestion

0 Jonathan Wong over 1 year ago in reply to Hailey Chen

TI__Expert 3240 points

Hello Hailey,

Thank you for reaching out.

Since each output is 1A, is the total power of the system 15.2W? If so, I would recommend the UCC28C59 in a flyback with multiple outputs. This product also has many variations (such as an automotive equivalent) and an EVM to help with your development.

If a lower power system is acceptable, I would recommend the UCC25800. It is a fully integrated transformer driver and will thus fit your small size requirement. It has an EVM for easy hardware development and has existing reference designs, such as the PMP40980, that show a multi output system.

You can further look through the PWM controller selections available at TI here: https://www.ti.com/power-management/acdc-isolated-dcdc-switching-regulators/pwm-controllers/overview.html

Regards,

Jonathan Wong

Isolation

Isolation forum

Power isolation solution