Fault management chip for LED lighting

23 January 2013 Circuit & System Protection

LED lights for critical applications such as vehicle lights, streetlamps and emergency lights can be more dependable and long-lasting thanks to a new fault management chip from STMicroelectronics.

The new LBP01 can be used in lamps that comprise multiple channels, each containing several LEDs. The IC bypasses failed LEDs so that the lamp can continue producing near-maximum illumination. This improves performance and safety, and can yield valuable savings for operators such as city authorities.

By offering the flexibility to use one bypass for every two LEDs, the device enables designers to reduce bill-of-materials costs. It also provides built-in surge protection to help prevent LED failures occurring. The LBP01 can also be used to enhance LED backlight longevity in LCD panels for a wide variety of applications.

Housed in a 3,95 x 5,6 mm SMB or 3 x 3,05 mm SOT23-5 package, the LBP01 features 100 nA leakage current and can be used with LED channel current up to 1 A. Unidirectional (LBP01-0803SC5) and bidirectional (LBP01-0810B) variants are available.

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