Power Management I Product News
30W DC-DC converter complies with railway transient and EMC standards
The RDC30 series of highly efficient metal cased and isolated 30 W DC-DC converters from XP Power have been designed specifically for railway applications. Accommodating a wide input range based around the popular railway input voltages of either 72 (36-140) VDC or 110 (55-176) VDC, the converters are available with single, dual or triple outputs and conform to the railway industry transient standards EN50155, NF F 01-510 and RIA12. The single output models provide the standard regulated output voltage of 3.3, 5, 12 or 15 VDC, and duals provide +/- 5, +/- 12 or +/- 15 VDC. Triple output models provide a 3.3 VDC output with either +/- 12 or +/- 15 VDC outputs, or a 5 VDC output with either +/- 12 or +/- 15 VDC outputs. These convection-cooled converters have an efficiency rating of up to 91%, and deliver a power density of 37.5 Watts per cubic inch from their compact package that measures 25.4 x 50.8 x 10.16 mm (1 x 2 x 0.4 inches). When convection cooled the operating temperature range is from – 40C to + 75C. An optional heatsink extends this up to + 80 degrees C. Maximum case temperature is + 105 degrees C. 1500 VAC Basic isolation between input and output, and 1600 VDC between input/output and the metal case is provided across the range.
The RDC30 series complies with the
internationally recognised EMC standard EN50121-3-2 as required for railway applications and rolling stock apparatus. A remote On/Off function gives external control of the output while a trim input
Intersil’s ISL6446A dual PWM/linear controller provides flexible single-chip solution
Intersil Corporation has introduced a new dual PWM + linear controller that delivers a more flexible and efficient power solution for a broad variety of broadband and networking applications.
The ISL6446A integrates complete
control, monitoring and protection functions for two synchronous buck PWM controllers and one linear controller. It allows designers to easily convert 4.5V to 24V DC into as many as three output voltages, with extensive protection. Each output can be controlled independently with adjustable soft-start control. The ISL6446A delivers maximum efficiency over the full operating range of input and output loads. Users can easily design compact DC/DCs with up to 25A current for two channels.
The ISL6446A is designed for ATX power
supplies, DSP, ASIC, and FPGA point of load regulation and industrial and security networking applications. It provides a complete set of robust protection features such as thermal shutdown and latch-off mode overcurrent.
Intersil |
www.intersil.com
provides the capability to adjust the output voltage +/- 10% of the nominal output voltage. In addition to the 30 Watt RDC30 series, XP
Power’s DC-DC converter line-up for railway applications includes the RDQ100/150 series of 100 Watt and 150 Watt base plate cooled converters.
XP Power |
www.xppower.com
New µModule regulator comes with configurable array
The LTM8001 from Linear Technology is a step-down µModule (micromodule) regulator that consists of an array of five low noise 1A linear regulators. The linear regulators are also configurable to deliver 2A, 3A, 4A or 5A, depending on the number and combination of current shared outputs.
Maxim Integrated launches highest accuracy fuel gauge to enhance user experience
Maxim Integrated Products is sampling the MAX17050 which it claims is the most accurate battery fuel gauge currently available. It uses Maxim's patented
ModelGauge m3 algorithm to provide enhanced levels of accuracy, uses 4x less power, and shrinks solutions by 3x when compared to other, similar devices. It has been designed to target portable applications where battery capacity and state-of- charge accuracy is seen as critical, including smartphones, tablets, mobile radios, battery backup, and portable medical/fitness equipment.
Battery fuel gauge designs often depend on coulomb-counting technology. Although coulomb counting is highly accurate for a short period of time, it tends to drift over time. The MAX17050 uniquely integrates the short-term accuracy and linearity of a coulomb counter with the long-term stability of a ModelGauge fuel gauge. The ModelGauge m3 technology makes continuous microcorrections and eliminates sudden jumps in a battery’s state of charge (SOC). Users can trust the resulting battery capacity and state information, including the health and maximum battery usage. The MAX17050 functionality is also integrated into the company's TINI Power System-on-Chip (SoC)
Housed in a 15mm x 15mm x 3.42mm ball grid array (BGA) package, the LTM8001 provides high efficiency conversion from an input source, ranging from 6V to 36V, by powering the five low noise linear regulators from an onboard synchronous step-down converter. Each output voltage is adjustable from 0V to 24V. The LTM8001 is designed to supply multirail systems based on FPGAs, DSPs, ASICs and microprocessors. Each of the devices five linear regulars has an adjustable output voltage ranging from 0V to 24V with ±2% accuracy over temperature. Output noise is just 90µVRMS over the 10Hz to 1MHz frequency range. The step-down regulator
features a user-adjustable current limit accurate within ±10%. The LTM8001 is available with guaranteed operation over the -40°C to +125°C and -55°C to +125°C internal temperature range.
Linear Technology |
www.linear.com
Second generation SiC MOSFET brings cost savings to power conversion systems
to make it easier to upgrade designs to more complex systems.
“Mobile device manufacturers are increasingly paying attention to enhancing user experience to set themselves apart from their competition,” said Bakul Damle, Business Director at Maxim Integrated. “Having a trustworthy fuel gauge to correctly inform the user about the battery status, as well as the health of the battery, helps achieve this goal. Moreover, this best-in-class fuel gauge IP block is available for integration in Maxim Integrated’s highly integrated Power SoC.”
Maxim Integrated Products |
www.maxim-ic.com
Cree has released its second generation SiC MOSFET providing systems with both higher efficiency and smaller size but at cost parity with silicon-based solutions. These 1200V MOSFETs are, according to Cree, able to deliver industry-leading power density and switching efficiency at half the cost per amp of Cree’s previous generation MOSFETs. At this price-point Cree believes they will enable lower system costs for OEMs and provide additional savings to the end-user through increased efficiency and lower installation costs.
The enhanced performance of these SiC MOSFETs enables the reduction of required current rating by 50-70 percent in some high power applications. When properly optimised, customers are able to get the performance benefits of SiC with the same or lower systems cost as with previous silicon solutions. For solar inverters and uninterruptible power supply (UPS) systems, the efficiency improvement is accompanied by size and weight reductions. In motor drive applications the power density can be more than doubled while increasing efficiency and providing up to twice the maximum torque of similarly rated silicon solutions. The product
34 April 2013 Components in Electronics
offering range has been extended to include a much larger 25 mOhm die aimed at the higher power module market for power levels above 30 kW. The 80 mOhm device is intended as a lower cost, higher performance upgrade to the first generation MOSFET. Die are available with ratings of 25 mOhms, intended as a 50 Amp building block for high power modules, and 80 mOhm. The 80 mOhm MOSFET in a TO-247 package is intended as a higher performance, lower cost replacement for Cree’s first-generation CMF20120D.
Cree |
www.cree.com www.cieonline.co.uk
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44