Rad-Hard Integrated Current Limiter, Diodes, and Rectifiers

STMicroelectronics has expanded its offering of rad-hard power semiconductors with the addition of the RHRPMICL1A integrated current limiter (pictured above) designed to work with an external P-channel power MOSFET. ST's expanded portfolio of hi-rel- and aerospace-diode portfolio includes Schottky (1N58xx, STPSx) and bipolar rectifiers (1N66xx, BYXxx).

The RHRPMICL1A can be used as a universal solution to protect a power supply (from 8.5 V) from anomalous external current demand (for example, in case the load enters latch-up conditions). It can protect or replace conventional fuses and can also be used to control redundant loads.

The RHRPMICL1A features 3 user-configurable operating modes (re-triggerable, latched, foldback), with different behaviors in case of overload/short-circuit events.

All key parameters of the application, including the current limit, the trip-off and recovery times and the undervoltage protection are user configurable, making the RHRPMICL1A suitable for a wide range of applications. Because of its floating ground, it can even be used on power buses with voltage above its maximum specification of 52 Volt supply voltage.

The status and control pins allow remote control of the device and consequently the load.

The RHRPMICL1A is designed in ST's proprietary BCD6s-SOI technology to provide total dose and heavy ion radiation hardness. Housed in a hermetic Flat-20 package assembled in ST's QML-V certified facility, it is ideally suited for harsh environments.

Key features of the RHRPMICL1A

• Wide-range supply voltage: 8.5- to 52-Vdc (can be extended up to 90V)
• Very low dc current: typ. 1.5mA
• External current limitation setting
• 3 types of operation
  • Re-triggerable
  • Latched
  • Foldback
• Configurable trip-off and recovery times
• Smart current limitation for repetitive overload
• Embedded current sense
• Configurable undervoltage protection
• Floating ground
• Flat-20 hermetic package
• Radiation hardened
  • TID : 100 krad (Si) HDR
  • SEL& SEU free up to 78 MeV.cm²/mg
  • SET report available upon request
• QML-V qualification planned
• Evaluation boards available

Rad-Hard Diodes and Rectifiers

ST's hi-rel- and aerospace-diode portfolio includes Schottky (1N58xx, STPSx) and bipolar rectifiers (1N66xx, BYXxx).

These devices offer very good performances within many applications and are available with a reverse voltage up to 200V and a maximum forward current up to 40A.

Housed in a variety of packages, including TO-254, SMD.5 and LCC2 (compatible with US D5-A/B), they have been qualified under the ESCC system.

New Generation of Power Diodes for Space

Specifically designed for Aerospace and Defense applications, all devices in this new series are qualified at 3Mrad(Si) and characterized to demonstrate their SEE robustness.

The STPS60A150C is the first 150V Schottky diode to be qualified for space, paving the way design with dramatically enhanced efficiency.

Key features of the STPS60A150C:

• Forward current: 2 x 30A
• Repetitive peak voltage: 150V
• Low forward voltage drop
• Monolithic dual die - common cathode
• Hermetic package
• SEE and TID characterized
• Package mass: 2g
• ESCC qualification in progress

Along with the STTH60200C, STTH60400 and STTH40200C, these power rectifiers offer a forward voltage (VF) significantly lower than what is currently available.

All products have a VF specified at various forward currents (IF) per diode, making it possible to take full advantage of the low VF, regardless of the actual current in the application.

Engineering model are available from stock for the 4 diodes and rectifiers.