Supertex, Inc. (NasdaqGS: SUPX) has introduced the HV9919, a pulse-width managed (PWM) controller integrated circuit (IC) designed to drive LEDs using a buck topology. It is well suited for a variety of solid state lighting applications, such as: industrial, architectural, signage, or decorative lighting; indicator or emergency lighting; and as a general purpose constant current source.
Specified over an operating power supply voltage of 2.7V to 3.3V, the PA2268 and the PA2268T have an On-Resistance of 0.6Ω at+2.7V.Break-before-make switching prevents both switches being enabled simultaneously. This eliminates signal disruption during switching.
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