STMicroelectronics claims to offers first SEB-rated HV Schottky diodes
Among the radiation-hardened devices announced by STMicroelectronics are what are claimed to be the industry’s first single-event burnout (SEB) –rated high voltage Schottky diodes.
(SEB is the destruction of electronic devices by heavy ionising radiation such as cosmic rays encountered in space applications.)
The ESCC (European Space Components Co-ordination) -qualified 200V and 400V power rectifiers and SEB-immune Schottky rectifiers have been added to the portfolio of radiation-hardened power devices qualified for space applications.
The rad-hard Schottky diodes include 45V and 150V devices, and are SEB-immune up to 61MeV/cm2/mg linear energy transfer (LET). They are claimed to be the industry’s first SEB-rated Schottky devices and are suitable for use in many converter topologies. The 150V and 45V devices are ready for direct connection to 100V and 28V satellite power buses. The forward voltage (VF) of the 150V devices is 0.78V (max) at 40A/125°C. The maximum VF for the 45V devices is 0.61V.
There are five ESCC-qualified dual common-cathode Schottky parts. The STPS40A45C contains a 45V/2x20A diode in a TO-254AA through-hole package, the STPS80A45C has a 45V/2x40A diode, the STPS60A150C 150V/2x30A and STPS80A150C 150V/2x40A are all packaged as SMD.5 hermetic surface-mount devices. The STPS40A150C 150V/2x20A is offered in TO254AA.
The rectifier diodes are the STTH40200C 200V/2x20A (dual diode in TO-254AA package), the STTH60200C dual 200V/2x30A and STTH60400 single 400V/60A diode in hermetic SMD1.
The rad-hard rectifiers and Schottky diodes are guaranteed by characterisation to resist a total ionising dose (TID) up to 3Mrad (Si). The voltage drop is guaranteed at four values of operating current to let multiple power-supply designs use a single device type.
The devices are fabricated at ST’s factory in Rennes, France, using the same planar technology as the company’s AEC-Q101 automotive-qualified devices. Space products from Rennes have achieved over 40 years’ flight history without failure.
ST advises that most variants of the new devices are in stock now.
