Supertex's New Isolated LED Driver HV9973 Requires No Secondary Components
Typical application schematics of the HV9973 that controls an isolated, flyback topology that meets UL requirements for galvanic isolation and operates from 280-400VDC
Typical application schematics of the HV9973 that controls an isolated, flyback topology that meets UL requirements for galvanic isolation and operates from 280-400VDC
Features:
• Programmable true constant current operation
• ±3% LED current accuracy
• Adaptive to external component tolerances and parasitics
• Primary-side current sensing
• Output open circuit protection
• Output short circuit protection
• Input under voltage lockout
• PWM dimming / enable
• 280-400VDC input
Applications:
• Lighting fixtures with 6-50W power range
“HV9973 utilizes a patented primary-side output control technique that maintains 3% control of the LED current setting and features tight line and load regulation,” states Alex Mednik, Director of Applications Engineering for Supertex. “The IC also offers a logic input for dimming LED light output by low frequency pulsewidth modulation of the output current.”
HV9973 is available in a RoHS compliant 8-lead SOIC package (HV9973LG-G). Samples are available from stock. Lead-time for production quantities is 4-6 weeks ARO. Pricing is US$1.62 each for HV9973LG-G in 1K quantities.
About Supertex:
Supertex, Inc. is a publicly held mixed signal semiconductor manufacturer, focused in high voltage analog and mixed signal products for use in the medical, LED lighting, display, industrial, and telecommunication industries. Supertex product, corporate and financial information is readily available at www.supertex.com.
