Current Sensor has operating voltage range of 8-450 Vdc.

Press Release Summary:

Offered in SOT23-5 package, HV7800 is designed to be used on high side of circuit to avoid signal degradation and EMI. Operating range allows it to work with 12, 24, and 48 V DC power systems as well as off-line 85-265 V AC systems. Green- and RoHS-compliant current sensing IC operates by sensing voltage across external resistor and transmitting reading to ground-referenced circuit at gain of one with typical accuracy of ±1%. Ground is undisturbed when sensing input or load currents.

Original Press Release:

Wide Input Voltage Range Enables Flexibility in Supertex's New Current Sensor

SUNNYVALE, Calif., March 14, 2006 - Supertex (NASDAQ: SUPX), a recognized leader in high voltage analog and mixed signal integrated circuits (ICs), today introduced the HV7800, a new high side, current sensing IC. The IC features a very wide operating range of 8V-450V DC, which allows it to work with DC power systems of 12V, 24V, and 48V, as well as off-line AC systems of 85V to 265V. The IC operates by sensing the voltage across an external resistor and transmitting this reading to the ground-referenced circuit at a gain of one with a typical accuracy of +/-1%.

High side current sensing allows the ground to be undisturbed when sensing input or load currents. Grounding system impedances in low side current sensing often cause signal degradation or electromagnetic interference. Because the HV7800 is designed to be used on the high side of a circuit, it avoids these sensing problems and provides a much easier sensing implementation.

"The wide input voltage range of the HV7800 allows it to be used to monitor current in telecom and base station applications, power management applications, and LCD TVs with LED backlight applications in which the HV7800 is recommended for use in conjunction with our recently introduced LED driver IC, the HV9911," states Ahmed Masood, Vice President of Marketing for Supertex. "The IC solves many current sense design problems-high voltage, high precision, fast response time and space considerations."

The HV7800 is available in a SOT23-5 package (HV7800K1-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 US$0.56 each for the HV7800K1-G in 1K quantities.

About Supertex
Supertex, Inc. is a publicly held mixed signal semiconductor manufacturer, focused in high voltage interface products for use in the telecommunications, networking systems, flat panel displays, medical and industrial electronics industries. Supertex product, corporate and financial information is readily available at

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