diyAudio

diyAudio (https://www.diyaudio.com/forums/index.php)
-   Class D (https://www.diyaudio.com/forums/class-d/)
-   -   TAS5630PHD without 15V Switcher circuit (https://www.diyaudio.com/forums/class-d/316170-tas5630phd-15v-switcher-circuit.html)

graygem 16th December 2017 02:33 AM

TAS5630PHD without 15V Switcher circuit
 
I am designing a TAS5630PHD / SMPS board and would like to take out the 15V switcher circuit. The only part of the TI EVAL circuit that really uses the 15V is the "3 Speed FAN Control & Temp Indicator." I would like to use 12V of an aux off the SMPS for the Temp Indicator instead and use a 9V fan. I'm not actually using a fan, but need the temp indicators to work right. This would allow me to remove the 15v switcher circuit and the 12v lin regulator circuit. Do I need to do anything different to the "3 Speed FAN Control & Temp Indicator" other than power from the 12V aux?

graygem 16th December 2017 02:53 AM

1 Attachment(s)
This is the original circuit

Attachment 651416

Khron 18th December 2017 12:21 AM

I'm quite sure, if you looked a bit more carefully, you'll find the +15V rail also supplies the linear regulators that power 1) the input opamps, and 2) the gate driving circuitry of the TAS5630.

DUG 18th December 2017 12:32 AM

LM317 need minimum load:

3.5-10mA

doctormord 18th December 2017 12:43 AM

No problems with that on the EVM.

graygem 18th December 2017 02:44 AM

Khron, you are right the 15v supplies the 12v linear regulator in the EVAL, and I have already seen that, but as I said, I would like to use the 12v auxiliary from my power supply. This way I would not need the 12v regulator circuit. The SMPS would also supply the 12v for the op amps and the gate driving circuitry. The only thing I am worried about is the Temperature Indicator circuit working right.


All times are GMT. The time now is 01:16 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 17.65%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio

Wiki