cutoff circuit for battery

This is the place for any magazine-related discussions that don't fit in any of the column discussion boards below.
Post Reply
solar3000
Posts: 39
Joined: Fri May 10, 2013 1:55 pm
Contact:

cutoff circuit for battery

Post by solar3000 » Wed May 29, 2019 4:56 pm

What's a simple circuit for low voltage cut-off?
I'm thinking of several circuits. One [li-ion] 3 volt low; 4 volt high. Another with a minimum of 12 volts.

User avatar
Janitor Tzap
Posts: 1416
Joined: Sat Aug 12, 2006 5:17 pm
Contact:

Re: cutoff circuit for battery

Post by Janitor Tzap » Thu May 30, 2019 9:40 am

Here's a video on a adjustable Battery Cut-off Circuit.
https://www.youtube.com/watch?v=2_fugmbnufk


Signed: Janitor Tzap

User avatar
haklesup
Posts: 2933
Joined: Thu Aug 01, 2002 1:01 am
Location: San Jose CA
Contact:

Re: cutoff circuit for battery

Post by haklesup » Thu May 30, 2019 12:25 pm

for the 12V application, there are tons of relay controlled modules on ebay but they consume a fair amount of current on their own especially the relay based ones. I tried to implement some in a car to power off the audio amps when running on battery if it got too low but they tend to kill the battery on their own if left parked too long.

For the low voltage applications, search digikey for "PMIC" Supervisors or power management ICs. Here is one example that can be coupled wit a FET or Relay (they offer 7 different output pin types). Dig down to the Linear App notes related to this product line and you should find some application circuits.
https://www.digikey.com/en/datasheets/a ... _6321_6322

Besides Linear Technologies, IDT, Analog and TI should also have ICs in this category as well as a bunch of smaller companies. App notes are their way of explaining how to use their products, always look for those.

JimAxtell
Posts: 4
Joined: Mon Jul 08, 2019 3:19 pm
Contact:

Re: cutoff circuit for battery

Post by JimAxtell » Mon Jul 08, 2019 3:21 pm

Janitor Tzap wrote:
Thu May 30, 2019 9:40 am
Here's a video on a adjustable Battery Cut-off Circuit.
https://www.youtube.com/watch?v=2_fugmbnufk


Signed: Janitor Tzap
Thanks for the video. I will definitely use it for my personal experience.

Post Reply

Who is online

Users browsing this forum: No registered users and 14 guests