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LED driver saves space, cost in illumination apps

Posted: 25 Jan 2010 ?? ?Print Version ?Bookmark and Share

Keywords:LED driver? lighting application? MOSFET?

DLD101 LED driver

Diodes Inc. has released a 1A-rated linear-mode constant current LED driver specifically designed to reduce the size and cost of a range of general illumination products, including flashlights and lighting in emergency, garden and poolside applications.

Packaged in an optimized small footprint, low-profile DFN package, the integrated DLD101 LED driver provides designers with significant board space savings, with the package's high thermal efficiency assuring higher power dissipation than comparable SOT23 ICs.

By integrating a base accessible pre-biased transistor, DLD101 has been able to incorporate biasing resistors on chip, meaning LED current setting is now via a single external resistor, without the need for an additional boost transistor. For the pass element, a high drain current 60V n-channel MOSFET has been used instead of a bipolar transistor to reduce overall bias current.

As well as reducing the PCB size and external component count of alternative LED driver solutions, the DLD101 also completely removes the EMI signature associated with switching regulator solutions.

The DLD101 1A linear mode constant current LED driver is priced at $0.25 each in quantities of 10K.

- Paul Buckley
Analog DesignLine Europe

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