Half-Bridge Galvanically-Isolated in Low Voltage, Low Power Application?

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The_BOOM
Level 3
Level 3
10 questions asked 10 sign-ins 10 replies posted
Can a half-bridge configuration, such as the following, be an efficient solution for the following requirement?

Requirement:
- Galvanic isolation between input and output
- Input: 12-24V DC
- Output: 5V DC @ 2A

What about SR losses? According to Infineon's chart, below, SR losses would exceed diode losses at our desired output. Is there a way to mitigate that, or an alternate topology?

From Infineon Video
https://youtu.be/LyhsaTeN-oQ?t=198

4709.attach

4710.attach
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1 Solution
Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored

Hi,

As per the required power specification, a Flyback topology is well preferred. It has less component count compared to half bridge and it is easy to control.

Please find the attached image with different DC-DC topologies,

4855.attach
Please revert back if you need any help in selecting the right switch and the package.

Regards,
Abhilash P

View solution in original post

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1 Reply
Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored

Hi,

As per the required power specification, a Flyback topology is well preferred. It has less component count compared to half bridge and it is easy to control.

Please find the attached image with different DC-DC topologies,

4855.attach
Please revert back if you need any help in selecting the right switch and the package.

Regards,
Abhilash P

0 Likes