Increase current amperage by using darlington transistor

[koklimabc]

I'm using DC adapter 5.8 volt with 580 miliamp to produce 1.5 amp by using a pair of NPN transistor 2N3904 to be build as Darlington circuite.

Is it possible?

 

[DPG]

I'm using DC adapter 5.8 volt with 580 miliamp to produce 1.5 amp by using a pair of NPN transistor 2N3904 to be build as Darlington circuite.

Is it possible?

I think you would need to show us your full circuit design. The Darlington pair is literally just two transistors acting as a high gain pair.

 

[pc1966]

The 2N3904 is only rated at 200mA anyway.

I think the answer really is "no".

 

[koklimabc]

i see, I just to booast the amperage but don't care to lower bujt simply used to charged two 1.3 Li-ion battery

 

[davesparks]

If the power supply is only capable of providing 580mA then no you won't be able to get 1500mA out of it.

 

[newfutile]

A 2n3055 can switch more current , but as stated , if you can’t supply the current in the first place the voltage will drop to limit the current

 

[Avo Mk8]

i see, I just to booast the amperage but don't care to lower bujt simply used to charged two 1.3 Li-ion battery

You could in theory build or buy a buck converter to generate a lower voltage at higher current, but given 580mA at 5.8V (3.3W) available, the max voltage you could get with 1.5A draw would be around 2V,

I may be missing something, but a Li-Ion cell is normally 3.7V, not 1.3V. NiCd or NiMh batteries are 1.2V.
Where does the 1.3 come from? But you can have 1.3Ah Li-Ion cells!

 

[koklimabc]

You could in theory build or buy a buck converter to generate a lower voltage at higher current, but given 580mA at 5.8V (3.3W) available, the max voltage you could get with 1.5A draw would be around 2V,

I may be missing something, but a Li-Ion cell is normally 3.7V, not 1.3V. NiCd or NiMh batteries are 1.2V.
Where does the 1.3 come from? But you can have 1.3Ah Li-Ion cells!

I see, It is Nimh cell with two batteries.

 

[DPG]

I see, It is Nimh cell with two batteries.

I would get a suitable circuit from the internet unless you are sure you could design one yourself.

 

[Avo Mk8]

E.g.

0.49€ 88% de réduction|Chargeur Intelligent Pour Batterie Nimh, 1a, 1.2v, 2.4v, 3.6v, 1.5v, 3v, 4.5v, Cc/cv, Lithium Rechargeable - Circuits Intégrés - AliExpress

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