what is the best type of voltage regulation for my application?
what is the best type of voltage regulation for my application?
(OP)
I need a voltage regulator to send a consistent 4.2 voltage to the load, even as the battery voltage drops (from 4.2 V to 3.7 V) as it get discharged. The load resistance can vary from 0.5 Ohm to 1.5 Ohm.
There is a mechanical switch between the battery and voltage regulator, which the user turn on/off. When the switch is off, there is no current. When the switch is on, I need to voltage regulator to output a specific voltage regardless of battery voltage is at the time.
Is this possible? In another word, the voltage regulator need to be turned "on" the instant the mechanical switch is on and goes "off" the instant the switch is off. No delay or anything like that. Nor do i want to have to "turn on" the voltage regulator first before it'll start working (as if it's separate unit). This is because the voltage regulator itself is not very accessible and the only switch available to the user is the mechanical switch that connects the battery to the regulator.
The user shall swap out the battery once the battery voltage is at 3.7V, at which point the regulator will flash a signal light, and give off no more output to the load.
Ideally, the voltage regulator, the load, and the battery share the common ground. thx
The device works the best at 4.2 V, hence the need for a regulator. thanks
There is a mechanical switch between the battery and voltage regulator, which the user turn on/off. When the switch is off, there is no current. When the switch is on, I need to voltage regulator to output a specific voltage regardless of battery voltage is at the time.
Is this possible? In another word, the voltage regulator need to be turned "on" the instant the mechanical switch is on and goes "off" the instant the switch is off. No delay or anything like that. Nor do i want to have to "turn on" the voltage regulator first before it'll start working (as if it's separate unit). This is because the voltage regulator itself is not very accessible and the only switch available to the user is the mechanical switch that connects the battery to the regulator.
The user shall swap out the battery once the battery voltage is at 3.7V, at which point the regulator will flash a signal light, and give off no more output to the load.
Ideally, the voltage regulator, the load, and the battery share the common ground. thx
The device works the best at 4.2 V, hence the need for a regulator. thanks





RE: what is the best type of voltage regulation for my application?
From a typical user viewpoint, flipping the switch on the wall shows no delay in turning on the ceiling light... yet high-speed SDRAM lines would fail miserably over those distances as it looks like a million miles.
Delay is relative...
Dan - Owner
http://www.Hi-TecDesigns.com
RE: what is the best type of voltage regulation for my application?
RE: what is the best type of voltage regulation for my application?
Because of the AC operation of the voltage doubler, and the energy stored in the capacitor, it will take extra complication to make the circuit appear 'instantaneous'.
On the other hand, with a big capacitor, the warning light can stay on for a while after the battery is removed.
All of this stuff gets heavier and more expensive as the current supplied to your magic device, so far unspecified, goes up. You will also need some filtering to isolate the noise from the doubler and the regulator from your device.
In short, you need a real EE, in person.
Mike Halloran
Pembroke Pines, FL, USA
RE: what is the best type of voltage regulation for my application?
TTFN

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RE: what is the best type of voltage regulation for my application?
RE: what is the best type of voltage regulation for my application?
A problem I can foresee is that such a system (being 8A capable) would occupy more volume than simply using a 2nd (18650?) Li-ion cell and regulate down to 4.2v.
RE: what is the best type of voltage regulation for my application?
The way you typically "turn on" a boost converter is simply by supplying it power. I don't see how this scenario is fundamentally different. Am I missing something?
RE: what is the best type of voltage regulation for my application?
RE: what is the best type of voltage regulation for my application?
TTFN

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Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
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RE: what is the best type of voltage regulation for my application?
Dan - Owner
http://www.Hi-TecDesigns.com
RE: what is the best type of voltage regulation for my application?
TTFN

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Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
RE: what is the best type of voltage regulation for my application?
RE: what is the best type of voltage regulation for my application?
Dan - Owner
http://www.Hi-TecDesigns.com
RE: what is the best type of voltage regulation for my application?
Bill
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Jimmy Carter