Other Parts Discussed in Thread: TPS54308, SN6501
Is there reference design for gate driver bias power? It should have 3 - 4 output windings on the transformer.
The output voltage would be +15V/-5V for each rail. Thanks.
Regards
Brian
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Hi Brian,
I am not aware of any reference designs with 3 to 4 outputs with each one being ±15V. Since SN6507 is an open-loop push-pull transformer driver, having 3 to 4 output windings might not be the best way to generate multiple rails. It is best to keep a separate SN6507 for each ±15V output to position the power supply close to the gate driver. Alternatively, you could have 2 or 3 transformers driven by same SN6507 provided they are located close to the device.
Let me know if you have any other questions, thanks.
Regards,
Koteshwar Rao
Thanks. Since customer is now using TPS54308 with Flybuck scheme, it is able to generate multiple outputs for bias power of inverter. Cost is a concern.
We are just thinking how to position SN6507 to replace it.
Is SN6507 positioning in communication iso power not bias power of gate driver on inverter , right?
Hi Brian,
Customer can still use a transformer with 3 to 4 output windings connected to SN6507 but we currently do not have a reference design or a transformer to recommend. If customer can work with a transformer vendor to have push-pull transformer with 3 to 4 windings, then SN6507 should still work.
The output voltage might not be as tightly regulated as TPS54308 but I believe Gate Drive applications can work with such outputs.
If customer doesn't all the features of SN6507 then they could use SN6501/SN6505 to drive multiple smaller transformers and it could still be cost-effective. Let me know if either of the options work for customer, thanks.
Regards,
Koteshwar Rao