LED driver integrates 0.8-Ω MOSFET
The HV9967 LED driver is an open loop, average-mode current control device that operates in a constant off-time mode. The IC includes a 60 V, 0.8-Ω MOSFET that can be used as a stand-alone buck converter, or connected as a source driver output for driving an external MOSFET, such as Supertex DN2450, to operate at offline ac line voltages.
The part features a proprietary control method that achieves fast, accurate LED current control through sensing only the switch current. The IC delivers LED current accuracy of +/-3% without sensitivity to external component variation. Housed in an 8-lead MSOP package, the device also includes internal over-temperature and short circuit protection, and a PWM dimming input. (ea/1,00, $0.80 for the HV9967MG-G — samples, now; 4-6 weeks ARO.)
Supertex , Sunnyvale , CA
Kenneth Vickers 408-222-4810
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