Need help for powering 4 oslon ir leds.

[protocol217]

I want to power this led star with four infrared leds ( oslon black SFH 4715 S )
https://de.rs-online.com/web/p/led-ir/7732892/
That led Star has 4 SFH4715S leds on it.

I know from the datasheet that 1 SHF4715S led can take max 1 A of current.

But i don't know on this 4 led star how are they connected and what current is maximum for this led star.
Please someone help me, Thanks in advance.

 

[Diver300]

The LED assembly has 4 LEDs in series. The current rating is the same as that for the LEDs, and 4 times the supply voltage.

 

[protocol217]

OK, so you say that a driver like this one: https://www.dx.com/p/3-6v-9v-800ma-...affiliate&utm_medium=dealextreme#.VCm8WVeLVhU
that gives 925 ma of current is good for this star, but i need more input voltage ( more batteries 4x lithium 3,7 v ) and it should work with this driver ?

 

[Diver300]

OK, so you say that a driver like this one: https://www.dx.com/p/3-6v-9v-800ma-...affiliate&utm_medium=dealextreme#.VCm8WVeLVhU
that gives 925 ma of current is good for this star, but i need more input voltage ( more batteries 4x lithium 3,7 v ) and it should work with this driver ?

That looks as though it should work. You might be a bit short of voltage when the batteries get near discharged.

The driver is a switch mode driver, so there is no loss of efficiency by having a higher voltage input, which will cause less current to be taken.

 

[protocol217]

thank a lot Driver300.