Power Management Solution has on-board thermal sensor.

Press Release Summary:



Model HV111 high-voltage Inrush Limiter/Circuit Breaker/Hotswap IC suits externally powered network equipment and pluggable backplane applications with loads up to 1.65 A. Operating from -8.0 to -80 V, unit has 3 current control algorithms and incorporates on-board, 80 V, 2 A MOSFET combined with UVLO supervisor. Features include multi-level current control, junction isolated construction, and 1.2 A inrush current limiting with 75 msec timeout.



Original Press Release:


Supertex Announces Fully Integrated High Voltage Inrush Limiter/Circuit Breaker/Hotswap IC


HV111 Integrates Power FET and Thermal Sensor

SUNNYVALE, Calif. June 24, 2003 - Supertex Inc. (NASDAQ: SUPX) today announced the HV111, a fully integrated, high voltage Inrush Limiter/Circuit Breaker/Hotswap IC; a complete power management solution for externally powered network equipment and pluggable backplane applications with loads up to 1.65A. Operating from -8.0 to -80V, HV111 requires no external components, eliminates the need for a sense resistor, incorporates an on-board thermal sensor that ensures fail-safe circuit protection and has three separate current control algorithms for maximum safety and flexibility.

HV111 is targeted for applications <1.65A. HV111 includes an on-board 80V, 2 Amp MOSFET that saves designers overall system cost as well as valuable board space, combined with an UVLO supervisor that when satisfied will begin a POR phase to prevent false start during input supply bouncing.

"In today's telecom/networking marketplace emphasis is on simple, low cost solutions to power management problems. HV111 integrates all of the power management needs and replaces scores of discrete components with a single DPAK-5 footprint," states David Schie, Supertex's Vice President. "With multi-level current control, rugged junction isolated construction and integrated thermal sensor, HV111 makes a system bullet proof to faults."

Additional features include: 1) a "dead short" detector to restrict excess power dissipation; 2) 1.2A inrush current limiting with 75msec timeout for component protection, and to prevent EMI and voltage glitches; 3) fast return to limit for diode 'OR'ing or current fault (with 75msec timeout) that prevents false triggering the circuit breaker during switch over from battery to main power; 4) 2A circuit breaker for over current protection; 5) high voltage open drain PWRGD that eliminates the need for costly level shift circuitry and; 6) 9 sec auto-retry.

The HV111K4 is available in a thermally rugged DPAK-5 package that provides improved thermal resistance when compared to SO-8 based solutions. Samples are available from stock. Lead-time for production quantities is 6 weeks ARO. Pricing is US$1.48 each in 1K quantities.

About Supertex

Supertex, Inc. is a publicly-held mixed signal semiconductor manufacturer, focused on 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 www.supertex.com.

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