Latching power switch chip?...

[mkr5000]

Is there a simple all in one device that serves as a latching power on/off for use with a momentary switch? I know I can do something with discrete transistors but wondering if there is something now that\'s in a single package? (with zero current draw when off) -- thanks

 

[mkr5000]

On Monday, January 30, 2023 at 11:38:00 AM UTC-5, mkr5000 wrote:
> Is there a simple all in one device that serves as a latching power on/off for use with a momentary switch? I know I can do something with discrete transistors but wondering if there is something now that\'s in a single package? (with zero current draw when off) -- thanks
and low current also -- 250ma at most.

 

[Ricky]

On Monday, January 30, 2023 at 1:19:07 PM UTC-4, mkr5000 wrote:

On Monday, January 30, 2023 at 11:38:00 AM UTC-5, mkr5000 wrote:
Is there a simple all in one device that serves as a latching power on/off for use with a momentary switch? I know I can do something with discrete transistors but wondering if there is something now that\'s in a single package? (with zero current draw when off) -- thanks
and low current also -- 250ma at most.

Sure. A D input FF can have the D input tied to the Q- output and will change state on each toggle on the clock line. You will need to do something to debounce the signal from a momentary switch. That circuit can be more complex than a transistor based On/Off control. Many of the On/Off controls are inherently debounced. You can get a pair of P/N channel FETs in a single package. That\'s pretty close to a \"chip\". Add a few passives and you are done.

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

 

[Ricky]

On Monday, January 30, 2023 at 1:19:07 PM UTC-4, mkr5000 wrote:

On Monday, January 30, 2023 at 11:38:00 AM UTC-5, mkr5000 wrote:
Is there a simple all in one device that serves as a latching power on/off for use with a momentary switch? I know I can do something with discrete transistors but wondering if there is something now that\'s in a single package? (with zero current draw when off) -- thanks
and low current also -- 250ma at most.

Ok, here\'s one that is actually a chip. No passives required. It\'s not zero power though, just close to it. If it is not allowed to draw any power when off, you will need to make is from mechanical parts. They make push buttons that do this.

https://www.analog.com/media/en/technical-documentation/data-sheets/MAX16054.pdf

--

Rick C.

+ Get 1,000 miles of free Supercharging
+ Tesla referral code - https://ts.la/richard11209

 

[Ed Lee]

On Monday, January 30, 2023 at 9:19:07 AM UTC-8, mkr5000 wrote:

On Monday, January 30, 2023 at 11:38:00 AM UTC-5, mkr5000 wrote:
Is there a simple all in one device that serves as a latching power on/off for use with a momentary switch? I know I can do something with discrete transistors but wondering if there is something now that\'s in a single package? (with zero current draw when off) -- thanks
and low current also -- 250ma at most.

https://en.wikipedia.org/wiki/Triac ?

 

[Fred Bloggs]

On Monday, January 30, 2023 at 11:38:00 AM UTC-5, mkr5000 wrote:
> Is there a simple all in one device that serves as a latching power on/off for use with a momentary switch? I know I can do something with discrete transistors but wondering if there is something now that\'s in a single package? (with zero current draw when off) -- thanks

https://www.adafruit.com/?q=latching+switch&sort=BestMatch