6-ch LED driver offers strong fault protection

6-ch LED driver offers strong fault protection

Suited for battery-powered LED backlighting applications, the 6-channel HV9957 LED driver provides strong protection from faulty LED strings. 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.

When a fault is detected, the affected LED string is removed from feedback and the rest of the strings continue normal operation. The IC can drive up to six strings of LEDs at 30 mA each. The part 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. Available in a 24-lead QFN package, the part also provides protection from fault conditions such as over- and under-voltage supply, over-current, and over-temperature. ($1.43 ea/1,000 — samples now)

By Christina Nickolas

Supertex , Sunnyvale , CA
Kenneth Vickers 408-222-4810

http://www.supertex.com