Single chip takes on backplane power control: News from Supertex

Note: Readers of the Editor’s free email newsletter will have read this news when it was announced. . It’s free!

The HV111 is a fully integrated high-voltage inrush limiter, circuit breaker and 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, the 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. The HV111 is targeted for applications under 1.65A.

It includes an onboard 80V, 2A 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 telecomms/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 multilevel current control, rugged junction isolated construction and integrated thermal sensor, the HV111 makes a system bullet proof to faults".

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

The HV111K4 is available in a thermally rugged DPAK-5 package that provides improved thermal resistance when compared with 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 1000-off quantities.

• Supertex: contact details and other news
• Other news in Power Supply ICs and Controllers
• Email this news to a colleague
•
• RSS news feed for Supertex
• RSS news feed for Power Supply ICs and Controllers
• Electronicstalk Home Page

Single chip takes on backplane power control

The HV111 is a complete power management solution for externally powered network equipment and pluggable backplane applications with loads up to 1.65A.