New Miniature HV Flyback Modules

drew.spriggs

drew.spriggs

Well-known member
1363__85240.1553435339.jpg


Standard models do 200v @ 45mA out, HV does 250v @ ~38mA, HV low noise 250v @ 30mA from a 12v supply. No heatsink required if there's ambient airflow. Apparently they are what the new Stewmac amps are using for a HV supply. $16USD.

Enable pin can be switched by just about anything, allowing for an easy way to delay HV after heaters warm up.

Horizontal module is about 25mm^2, vertical module is 16x8mm. All will fit onto standard header pins.

Looks to be a ridiculously easy way to generate HV for small amps/preamps!

https://www.shop-tes.com/power-supply/
 
Update: looks like Stewmac is using the standard low noise model, with 9v DC input to generate 150v for a 6V6 that they're running at super low dissipation - kinda weird approach, but whatever works I guess. They also have a fixed timer circuit to turn it on with a MOSFET driving a Darlington.

Difference between the low noise and standard models is just the output cap, so it shouldn't matter too much if you have a few filter nodes after.
 
Wow that's pretty interesting. About 9w. Dumb question. Could these be ganged together in parallel if you wanted more current? They are 9w.. What if you wanted 18w for push pull operation?
 
gtt said:
Wow that's pretty interesting. About 9w. Dumb question. Could these be ganged together in parallel if you wanted more current? They are 9w.. What if you wanted 18w for push pull operation?
Click to expand...
It's going to depend on the actual flyback controller IC being used, but the answer is usually not.

EDIT: Based on the datasheet it looks like they're using LT1619 as the controller, which does have a synchronization option to run multiples in parallel with an external clock, but the modules from Taylor don't have the sync pin routed out so it would be a little tricky to make that happen.
 
Last edited:
Just ordered a couple to check out. I had an idea for a DIY project but didn't want people to have to build a flyback supply to handle the current required for the project. These may be a good fit.
 
You must log in or register to reply here.
Back
Top