DIY Audio Projects Forum
 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

DIY Audio Projects Forum

Welcome to the DIY Audio Projects Message Forum. Use these forums to discuss Hi-Fi audio and to share your DIY Audio Projects. Registration is free and required to post messages and view the file attachments. Registration will only take a minute and registered users do not see any advertisements. After you have completed the online registration process, check your email (including spam/junk folder) for the verification email to activate your account. New members are under moderation - so your posts will not be visible until approved by a moderator. See the Read Me 1st, Forum RULES and Forum FAQ to get started on the forum.

It is currently 26 Jan 2021, 01:10

All times are UTC - 6 hours [ DST ]

Post new topic Reply to topic  [ 1 post ] 
Author Message
PostPosted: 03 Sep 2019, 14:35 

Joined: 03 Sep 2019, 14:32
Posts: 1
Hi colleagues,

I have designed an SMPS power supply based on the TNY286 integrated circuit and the issue that I am facing is auto-restart.

The circuit is powered with the 310VDC since I have rectified the 220VAC, and the SMPS transformer is from this link:
I have two outputs from the SMPS transformer and my plan was to generate two 15VDC rails using TL431 on one of the output winding.
One of the 15V rails has two buck regulators, for the 3.3V and 5V which has some sensors on them, one microcontroller so that rails is loaded but far from heavily.
The other 15V rail output has no load at this moment but is intended for the motor which will draw not more than 100mA.

When I want to achieve 15V on my outputs, restart occurs like it is described in the datasheet of the TNY286.
But when I change the feedback resistors (R30 and R31) in a way to get the 10V on the output, everything is fine. I have a stable voltage (no auto-restart) of 10V, 5V, and 3.3V. But unfortunately 10V is not enough for the motor, so I still need 15V.

The thing that confuses me is that on the page of the transformer it is stated that this transformer can produce 2x18V. Do you have some suggestion for me since I am getting out of ideas? Thank you all in advance!


This post has a file attachment. Please login or register to access it. Only Registered Members may view attached files.

Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1 post ] 

All times are UTC - 6 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 4 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
DIY Tube Projects :: DIY Tube Amp Kits :: DIY Speaker Projects :: DIY Solid State Projects :: DIY IC / Op-amp Projects :: DIY Phono Projects :: DIY Cable Projects :: Hi-Fi Audio Schematics
© - Terms of Service - Privacy Policy