The new IC is ideal for a variety of solid-state lighting applications, such as low voltage industrial and architectural LED lighting, signage or decorative lighting, indicator or emergency lighting, as well as a general purpose constant current source.
The hysteretic control function of the HV9918 maintains a constant output current to the LED string at all times, regardless of input voltage fluctuations. LEDs are proven to be far more reliable and long lasting when driven by a constant current than by a direct voltage source.
Supertex’s HV9918 provides fast transient load response and eliminates the need for feedback-loop compensation, states Ahmed Masood, vice president of marketing for Supertex. With its built-in switching FET, this device reduces overall system cost and board space while delivering accurate current control for LED lighting applications.
The HV9918 is available in an 8-Lead DFN package (HV9918K7-G). The part is green and RoHS compliant. Samples are available from stock. Lead-time for production quantities is 4-6 weeks ARO. Pricing is $0.68 for the HV9918K7-G in 1K quantities.
