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Six channel LED driver from Supertex provides robust fault protection for LED strings

FP0100 Provides Up To 100V Input Voltage Protection

Supertex has introduced the HV9957, a six channel LED driver that provides strong protection from faulty LED strings with patent-pending technology. HV9957 combines a switch-mode boost converter and six low dropout, linear current regulators to deliver high efficiency
and precise current control in an LED driver.

The IC can drive up to six strings of LEDs at 30mA each, which is well-suited for battery-powered LED backlighting applications. Temperature-triggered fault protection combined with an 'outlier' approach to indentify faulty strings overcomes problems inherent with ordinary fault protection. Faulty strings are turned off only when absolutely necessary. HV9957 provides protection from fault conditions such as overand
under-voltage supply, over-current, and over-temperature. When a fault is detected, the affected LED string is removed from feedback and the rest of the strings continue normal operation.

“By providing superior fault protection, HV9957 offers manufacturers a precise LED driver that can handle difficult fault conditions in individual LED strings,” states Stephen Lin, Vice President of Marketing for Supertex. “HV9957 also features sophisticated digital circuitry to provide frequency control, fault protection, and phased dimming that is controllable to very low duty cycles for high dynamic range in today’s
LED backlighting drivers.”

HV9957 is available in a 24-lead QFN package (HV9957K7-G). The part is RoHS compliant.

Click here to download the data sheet.

For more information, or details on the full range of Supertex products available from Anglia, please email info@anglia.com

Alternatively, click on this link to go to the main Supertex section where you can view other news articles and product data.

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