Need an IC for DC to PWM conversion

Iawia

Member

• Jun 30, 2013

• #1

Hi,

how can I generate PWM signals (w/o a microcontroller if possible) from a variable dc signal (0-5v) to drive an H-Bridge?

Is there a IC that I can buy that will do it?

 

S

shortbus=

Well-Known Member

Most Helpful Member

• Jul 1, 2013

• #2

A SG3525 IC will do it. Although it needs 8V-35V for power, it uses 5V (which it provides internally) for the PWM control. It was originally made for switch mode power supplies, but can be used for many PWM circuits.

https://www.google.com/url?sa=t&rct...qd4FCCESR7EAsBXwtMkSq1g&bvm=bv.48572450,d.aWc

 

C

canadaelk

Active Member

• Jul 1, 2013

• #3

Or the 555! E

 

alec_t

Well-Known Member

Most Helpful Member

• Jul 1, 2013

• #4

Have you seen this?
https://www.electro-tech-online.com/threads/amperage-of-8-aa-cells-connected-in-series.528/

 

dr pepper

Well-Known Member

Most Helpful Member

• Jul 1, 2013

• #5

I recently used a TL494 for the same purpose, it was a pyrography pen for the mrs.
The SG3525 I think is a modern version of the TL494.
I'll dig up the '494 schematic if you want to go with that.

 

BeerBelly

Member

• Jul 1, 2013

• #6

This is a very popular IC which is almost always used.

dr pepper said:

I recently used a TL494 for the same purpose, it was a pyrography pen for the mrs.
The SG3525 I think is a modern version of the TL494.
I'll dig up the '494 schematic if you want to go with that.

Click to expand...

 

ronv

Well-Known Member

Most Helpful Member

• Jul 1, 2013

• #7

Or here is one using a comparator.

 

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Iawia

Member

• Jul 1, 2013

• #8

ok thanks guys. I will look at your wonderful suggestions.