Help for Power Pushbutton Circuit Design
Discussion in "Electronics" started by sakibnaz Dec 26, 2012.
Wed Dec 26 2012, 06:57 pm
Hi.
I need to design a Power Circuit for a Battery (Li-Poly, 3.7v) powered Device.
I want a to use a Powerbutton (Pushbutton, Mom-Off) for Power ON/OFF. Like:
- Press the Powerbutton - Power ON the Device.
- Press the Powerbutton and Hold for few sec - Power OFF the device.
Can anyone refer any power management Chip? Or any Schematic also appreciated.
Thanks in advance.
Regards.
I need to design a Power Circuit for a Battery (Li-Poly, 3.7v) powered Device.
I want a to use a Powerbutton (Pushbutton, Mom-Off) for Power ON/OFF. Like:
- Press the Powerbutton - Power ON the Device.
- Press the Powerbutton and Hold for few sec - Power OFF the device.
Can anyone refer any power management Chip? Or any Schematic also appreciated.
Thanks in advance.
Regards.
Wed Dec 26 2012, 07:30 pm
Just check this
http://www.extremecircuits.net/2010/06/on-and-off-button.html
http://www.extremecircuits.net/2010/06/on-and-off-button.html
Wed Dec 26 2012, 07:49 pm
Hi.
Thanks for your reply.
My power Source is 3.7 (Li-Poly). Basically I am looking for a small circuit with very less components. Like - Transistor based or a dedicated chip based. So it can consume less space on PCB.
Any other solutions please.
Regards.
Thanks for your reply.
My power Source is 3.7 (Li-Poly). Basically I am looking for a small circuit with very less components. Like - Transistor based or a dedicated chip based. So it can consume less space on PCB.
Any other solutions please.
Regards.
[ Edited Wed Dec 26 2012, 07:49 pm ]
Thu Dec 27 2012, 06:09 am
There are manu PMICs available with on/off control but not as you want. they are just logic high or low kind of ICs. You can check PMICs from TI, Semtec, microchip etc.
But you can use a small 8-pin micro (AVR/PIC, SMD will be even smaller) for doing this job. you can use one of the GPIO for controller your power assembly.
But you can use a small 8-pin micro (AVR/PIC, SMD will be even smaller) for doing this job. you can use one of the GPIO for controller your power assembly.
Fri Dec 28 2012, 06:11 am
Refer to the referenced video blog for an exquisite walk-through
[ Edited Fri Dec 28 2012, 06:13 am ]
Fri Dec 28 2012, 06:22 am
Try this one as well & go on & characterize each of the above in terms of power consumption...etc and see which one suits your needs.
[ Edited Fri Dec 28 2012, 06:22 am ]
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