Roberts Warr Electronics News & Resources

Battery charges and the C300 and B300 Series’ of 150W DC/DC Converters, AC/DC Power Supplies have been introduced by Schaefer Inc.

The C300 DC/DC have the input of 10-16V, 18-36V, 36-75V, 45-90V, 80-160V, 160-320V, and 320-380V are available, whereas output voltages range from 5VDC to 220VDC. The C300 AC/DC Series have the same range of output; the choice of inputs is: 110VAC, 230VAC, or 115-230VAC.

The devices feature efficiency of from 70 to 90% as well as tight line and load regulation. Other features are:  DC input reverse polarity protection, redundant operation, remote on/off, and temperature compensated charging voltage.

A new 80-watt MPI-P10H AC/DC ATX switching power supply has been introduced by Magic Power Technology Inc. The device fits within 1U height constraints. It’s ideal for low power, no noise and compact industrial automation systems.

The MPI-P10H is designed with “universal input, active PFC and can generate 80 watts at 50 degree Celsius under convection cooling or continuously 100 watts and peak 120 watts with 10.2 CFM forced air cooling”.

The device features power good, power fail signals and remote ON/OFF function. Its design increases the reliability and the performance and reduces the dust into the system. It is compliant with UL/EN/TUV 60950-1, provides short-circuit, over voltage and output overload protection.

Optimal Power Supplies LLC is a a company that manufactures AC to DC and DC to DC 1U High 19inch rack mount power supply systems with remote management. It also designs and sells automation products like RS232 to RS485/RS422 serial communication converters.

Westcode Semiconductors Limited introduced a new addition to its range of GTO (gate turn-off) thyristors. The new 3.6V blocking device is symmetrical and has a nominal current rating of 1000A. Westcode used its unique cathode chip design to develop these products. The devices offer robust switching performance for megawatt controlled power systems and have got the improved breadth of bipolar power. 

GTO thyristors have controllable turn-off current of 1000A when used with a snubber capacitor. With a 3.6kV rating, these new devices are also suitable for a 1.5kV DC link voltage and offer a maximum reverse blocking voltage capability.

Infineon Technologies AG introduced the first IGBT (Insulated Gate Bipolar Transistor) modules of its IHM/IHV B series. It has highly efficient power inverted designs for use in traction drives for locomotives, trains and tramways. The new device has improved thermal bahavior, an expanded operating temperature of up to +150°C and a high load cycling capability.

IGBT provides up to 50% more power with the same inverter size.

Martin Hierholzer, Head of Industrial Power at Infeon Technologies, says: “With the IHM-A module design, we have established another standard for high-power modules. The power modules of the IHM/IHV B series again set the benchmark related to high current, power cycling capability and reliability. Furthermore, our customers will benefit from the mechanical compatibility with the previous IHM-A family.”

International Rectifier (IR), the world leader in power technology, introduced the IRF7835PbF and IRF7836PbF, 30V synchronous buck HEXFET© MOSFETs for DC-DC synchronous point-of-load converters. Those MOFSETs are designed for applications where small size, high efficiency and improved thermal conduction are required.

The devices reduce total gate charge up to 25% optimizes the body diode losses and maintains the similar RDS performance.

The new IRF7836PbF is designed for power rails and may be used in applications up to 9A per MOSFET whereas the new IRF7835PbF requires a thermal design current of 35 amps from a two-phase voltage regulator using one control and two synchronous MOSFETs per phase.