SP7686A datasheet(11/16 Pages) SIPEX

Part #	SP7686A

Description	Constant Current Flash Driver in DFN 2mm x 3mm

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Manufacturer	SIPEX [Sipex Corporation]

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Jul16-07 RevP

SP7686: 500mA LED Driver



2007 Sipex Corporation

- 11 -

The SP7686 can be used with multiple LEDs in parallel

as shown below. For best performance, the LEDs should

be in a single package, preferably from a single die to

have better matching for forward voltage VF for a given

forward current IF. In practice, if the VF of one LED is

higher than the others, it will consume a larger IF, which

will raise its temperature which will then cause its VF to

reduce, correcting the imbalance. The overall current will

be the sum of the individual currents, for example ITOTAL

= 4*ILED.

Figure 23. SP7686 with 4 LEDs in parallel

Figure 24. SP7686A with 4 LEDs in parallel

APPLICATION INFORMATION

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