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Power Management I Product News

Ericsson addresses high power datacom demands with latest DC/DC module

Ericsson has unveiled a second new product in its high-power PKM-NH platform, the PKM4817NH-PIHS, which employs the company’s hybrid regulated topology. The platform is optimised for datacom board applications that have a 52–58V system bus distribution and require high-power regulated quarter-brick-format intermediate bus converters.

The PKM-NH delivers up to 864W with a power density of 35.6W/cm3

(581W per cubic

inch) and follows the PKM4717NH, which was announced earlier this year and offered a high- power handling capability of 750W. To meet the challenge of packing this level of power into a fully regulated quarter-brick format DC/DC converter, Ericsson has deployed its proprietary topology known as Hybrid Regulated Ratio (HRR). The topology combines two power-control methods – voltage- regulation and ratio-regulation – resulting in high performance across the input voltage ranges between 40V to 60V, which are commonly used in datacom systems. The HRR topology implemented in the Ericsson PKM-NH platform guarantees the output voltage will remain stable and immune from voltage deviation due to power disturbances on the system bus voltage. The module delivers an output voltage from 8.6V to 10.8V at a maximum output current of 80A across an input voltage range of 40V to 60V, within the operational system voltage between 36V and 60V. Typical efficiency is 97% at 50% load and the module offers flat-curve characteristics from 20A to 60A, reducing

power losses to the lowest possible level and making a significant contribution to the reduction of energy consumption.

The PKM4817NH-PIHS comes in the industry

standard quarter-brick format measuring 57.9 x 36.8 x 14.3mm (2.28 x 1.45 x 0.56-inch). The module comes with two extra power pins to decrease power losses and guarantee optimal current distribution.

The PKM4817NH-PIHS provides 2250V input/output (I/O) isolation meeting functional isolation requirements and includes a number of I/O protection and operational features including input overvoltage suppression, soft- start for handling of high capacitance loads, delayed hiccup over-current protection, over- temperature protection, over-voltage and under-voltage lockout, and pre-bias startup functionality.

Ericsson Power Modules |

New family of dsPIC DSCs from Microchip

A new family of dsPIC33 Digital Signal Controllers (DSCs) has been unveiled by Microchip. The dsPIC33EP512GM710 family expands Microchip’s dsPIC DSC portfolio and adds higher levels of integration specifically for motor-control applications. The new family of DSCs has been designed to enable efficient dual motor control with 12 motor-control PWM channels (6 pairs), dual 12-bit ADCs, multiple 32- bit quadrature encoder interfaces, and two CAN modules. As a result of this integration theses devices can independently control two motors with a single microcontroller (MCU) helping to optimise system costs. This family can also serve as a communication hub for automotive or industrial applications to connect with multiple CAN busses.

These new devices expand the existing dsPIC33EP families by supporting 512 KB Flash, 48 KB RAM, and four operational amplifiers (op amps). Other features include: enhanced analogue functionality with two independent ADC modules, configurable as 10-bit 1.1 Msps with four sample and holds, or 12-bit, 500ksps with one sample and hold, supporting up to 49 channels.

This analogue integration supports advanced sensor applications that require multiple precision

Programmable PSUs provide constant current output down to almost zero volts

XP Power’s HDS series of 800 and 1500 Watt programmable AC-DC power supplies offer a typical efficiency of up to 93%. These single output low profile supplies measure 249.0 x 127.0 x 40.9 mm (9.80 x 5.00 x 1.61 inches) for the 800 Watt models and 280 x 127 x 63.5 mm (11.02 x 5.0 x 2.5 inches) for the 1500 Watt range and fit into an industry standard 1U or 2U profile. Two front mounted variable speed fans, included in the above dimensions, help conserve energy and keep noise to a minimum. The power density of these compact units is greater than 10 Watts per cubic inch. Both the output voltage and output current

are programmable from 0% through to 105% of stated nominal through a serial RS232 interface, I2C interface, a 0 to +5 VDC input or via an external potential divider. By programming the output current a true constant current output is achieved down to almost zero volts, this being significantly better than the industry norm which is typically only down to 20-40%.

The HDS series comprises seven models covering the popular nominal outputs from +12 to +60 VDC. The output voltage for both series can also be manually adjusted +/- 5% by a trim function in order to make up for line losses. Both ranges also provide a user selectable standby output of 5 VDC / 0.5 Amp or 9 VDC / 0.3 Amp when the AC input is present.

The units include a comprehensive set of signals and controls such as remote on/off, AC OK, remote sense, PWM switching and

overtemperature shutdown. I2C serial data connections provide for bi-directional data transmission between the power supply and external monitoring / controlling equipment. A current sharing function provides for parallel operation of up to five power units for applications that might require a higher output power or for redundancy purposes. This also allows for system scalability of any future increased power requirements. Accommodating the full universal input voltage range of 90 – 264 VAC, the HDS800/1500 is suitable for world-wide use. They have an extended operating temperature range from -10 degrees C to +70 degrees C (+60 degrees C for HDS1500) with no derating until +50 degrees C.

XP Power |

HWS-A provides significant performance improvements to established series

ADCs with several sample and holds as well the processing power of a DSP. The dsPIC33EP512GM710 family also includes a Peripheral Trigger Generator (PTG) for scheduling complex, high-speed peripheral operations which saves software cycles and reduces firmware complexity. These devices are suitable for less expensive designs for appliances such as air conditioners, washing machines, dishwashers and refrigerators; for automotive cooling fans, fuel pumps, water pumps, and sensors; and industrial equipment including embroidery machines, lathes and printers, as well as other applications.

Microchip |

Toshiba adds miniature packages to automotive MOSFET portfolio

Toshiba Electronics Europe (TEE) has expanded its family of power MOSFETs for automotive applications with the introduction of three new miniature package formats intended to help designers make significant PCB space savings but without affecting performance. The TPCA8xxx, TPCC8xxx and TPCP8xxx series of MOSFETs offer N-channel and P- channel variants and are provided in SOP Advance, TSON Advance and PS-8 package formats respectively. Respective dimensions are 5mm x 6mm x 0.95mm; 3.3mm x 3.3mm x 0.85mm and 2.8mm x 2.9mm x 0.8mm. All of

22 December 2013/January 2014

the new devices are 175°C rated and feature low on resistance and low input capacitance leading to low conduction and switching power loss. SOP Advance and TSON Advance packages have bottom-side metal heat slugs to conduct heat better than conventional miniature packages, such as SOP-8. The SOP-Advance devices are intended for mid-power applications where DPAK devices are conventionally used. TSON advance and PS-8 devices can replace SOP-8 devices and save board space.

The new TPCA8xxx SOP-Advance MOSFETs Components in Electronics

TDK Corporation has announced the introduction of the TDK-Lambda HWS-A series of AC-DC power supplies. The series comprises of five models rated from 15-150W and has been designed to meet a wide range of customer requirements. A significant upgrade of the established HWS series which was originally introduced in 2005, typical industrial applications include equipment used for factory automation, process control, LED display and signage, test and measurement, broadcast and communications. The HWS-A is completely form, fit and function compatible with the HWS series so upgrades are straightforward, it is also up to 12% lighter in weight. The new series also achieves up to a 3% improvement in efficiency at full load (up to 91% efficiency), and up to a 4% improvement at low loads. Power consumption at no load is also considerably lower, thereby contributing to a reduction in environmental impact. Operating from a universal input of 85-

265Vac (47-63Hz), the 50, 100 and 150W HWS- A models include active power factor correction and all models are EN61000-3-2 compliant. HWS-A meets SEMI F47 requirements at high line input. Each of the 15, 30, 50, 100 and

offer voltage and current ratings up to +60V and 40A for N-channel devices and -60V and -35A for P-channel devices. The TPCC8xxx TSON Advance series features voltages and currents to +60V/-60V and +30/-30A. TPCP8xxx N- channel PS-8 MOSFETs can be supplied as single-channel devices with ratings to +60V and 10A or in a dual-channel version rated to 40V and 5A. P-channel TPCP8xxx MOSFETs are available for voltages and currents up to -60V and - 8A.

In addition Toshiba can supply a PS-8 packaged device that combines a 40V, 5A N-channel MOSFET and a -40V, -4A P- channel MOSFET in the same ultra-miniature package.

Toshiba Electronics Europe |

150W models is available with nominal outputs of 3.3, 5, 12, 15, 24 and 48Vdc. The operating temperature range is wider than its predecessor; from -10 to +50°C at full load, and up to 70°C with appropriate derating.

All models meet EN55011/EN55022, FCC and VCCI curve B requirements for conducted and radiated EMI. The TDK-Lambda HSW-A series is approved to UL/CSA/EN 60950-1 and UL508 (with cover) safety standards, CE marked, according to the LV and RoHS Directives, and comes with a lifetime warranty.

TDK-Lambda |

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