Power Management I Product News
GPACK configurable power supply targets defence applications
Gaia Converter, a manufacturer of modular power components, has released a new state-of- the-art family of configurable integrated power supplies. The GPACK is able to deliver up to 800 W without a fan in 24 – 28 VDC avionic, aerospace, military and missile applications. With input voltage ranges of 9-45V or 16-
80V, the GPACK is an all-in-one, EMI, MIL-STD- 461or DO-160 and transient MIL-STD-704 or MIL-STD-1275 compliant, reverse polarity protected, single or multi-output complete power supply solution. The GPACK is configurable with up to four independent output lines of 3.3V, 5V, 12V, 15V and 28V. Each is capable of delivering up to 200W which can be serialised or parallelised and independently trimmed by the user; this provides maximum versatility and flexibility for multiple output voltages. The four output lines can be sequenced independently with remote on/off during the start-up phase or with a general on/off function.
Each output incorporates a complete suite of
protection functions including under voltage lockout, over voltage protection, current limit
New voltage regulator from Ericsson delivers digital dynamic-loop-compensation
Ericsson has introduced a new 3E DC-DC regulator, the BMR461. It is the first 12 x 12 x 8mm 12A digital point-of-load (POL) module to combine Dynamic Loop Compensation (DLC), low-bias current technology, advanced energy- optimisation algorithms to reduce energy consumption, and a land-grid-array (LGA) footprint that guarantees thermal, mechanical and electrical performance.
and over temperature protection; all are permanently short circuit proof. The GPACK also features an internal hold-up capability that can be enhanced with an external battery bus for additional back-up potential. The flange-based, fanless enclosure has uniquely compact overall dimensions of 200 mm x 100 mm x 60 mm, and the GPACK delivers its 800W of power with a baseplate temperature of up to 85°C. For applications requiring higher power levels, GPACKS can be configured in arrays with box-to-box current sharing.
GAIA Converter |
www.gaia-converter.com
HiTek adds 7th family of high voltage power supply modules for mass spectrometry applications
HiTek Power has added a seventh series to its range of power supply modules designed specifically for the mass spectrometry market, the Series MSRD.
The Series MSRD is a range of high stability,
reversible source power supply modules with a floating +3kV 400µA detector output. These modules offer 1.8W output power at voltages between ±5kV and ±12kV depending on the model, low ripple and provide reliable operation even in short circuits or arc conditions. The design of the floating detector has been implemented to ensure minimal additional common mode ripple on the source and very small levels of crosstalk, this attention to detail ensures high levels of final system performance. The modular design approach means the company can offer an extensive range of performance combinations to suit different requirements. Simple changes can be made to any mass spectrometry module if required, such as changing cable lengths and connectors or, if
The BMR461 Dynamic Loop Compensation is based on ‘state-space’ or ‘model-predictive’ control, which guarantees stability while achieving the optimum dynamic performance without requiring any external components. The new product performs an automatic compensation routine based on measured parameters, enabling the construction of an internal mathematical model of the power supply including external components such as filtering and parasitic resistors.
Based on the ‘state-space’ mathematical model, the BMR461 uses closed-loop pole placement and a model based on the resonant frequency of the output filter, reducing the number of output capacitors required for filtering and stability.
The BMR461 DLC is designed to
accommodate the vast majority of applications via PMBus commands. Board-power designers can therefore tailor the loop compensation; other parameters can be simply adjusted and monitored without any hardware modifications.
The BMR461 features several algorithms that optimise efficiency across a wide range of operating conditions. Compared to the conventional technology that is currently implemented in analogue and digital-hybrid POL regulators, the device’s combination of energy optimisation algorithms and low bias technology
requires up to five times lower current, improving overall efficiency.
Because of this combination, the BMR461 makes significant gains in efficiency, especially in sub-1V modules where it performs up 10 points higher than high-market-average units. Designed for high performances, the BMR461
recognises 84 PMBus commands and includes a non-volatile memory allowing board-power- designers to upload their own configuration files. The BMR461 also includes easy synchronisation through automatic pin detection and without the need for reconfiguration. In systems that use multiple BMR461s, the device offers the ability to reduce EMI and the amount of input filtering through phase spreading via the PMBus INTERLEAVE command.
The BMR461 operates over a wide input voltage range – 4.5V to 14.0V and features pre- bias start-up and shut-down; monotonic and soft-start power-up; input under-voltage shutdown; over-temperature protection and power-good; output short-circuit and over- voltage protection; remote control and differential sense; voltage setting via pin-strap or PMBus; and an advanced set of configurations via the Ericsson DC/DC Digital Power Designer software.
The BMR461 footprint is based on a matrix Land Grid Array (LGA) composed of 32 solder- pads and has been developed to meet OEM manufacturing requirements in terms of pick- and-place, solderability and co-planarity, or future evolutions.
A development board – called the ROA17003 – is also available to assist power system designers.
Ericsson Power Modules |
www.ericsson.com/powermodules
PWM controller IC lowers cost and standby power in smartphone power supplies
preferred, HiTek Power can offer a completely new custom solution using its proven power conversation topologies, control methods and mechanical knowledge.
HiTek Power |
www.hitekpower.com
Astro programmable time switch looks to cut energy wastage
Finder’s Astro 12.81 is an easily programmable time switch, which employs a digital program to calculate sunrise and sunset times by the user simply entering the location’s postcode with a single joystick. Its newest version now offers added flexibility, with the capability to override the Astro ON time with time-switch settings, further avoiding energy wastage. The Astro is able to control lighting, heating/cooling and humidity equipment in commercial, residential and industrial applications wherever sunrise and sunset times are critical in determining operational times, or where stipulated by local or national regulatory requirements. The device’s micro-controller stores postcode
data from 16 European countries, including the UK, which together with date information allows for the precise calculation of seasonal sunrise and sunset times. The Astro is also programmable using geographical coordinates, settable between 30°S and 64°N; 16°W and 50°E and it will also automatically compensate, should European Summer Time be enabled.
36 October 2013 The output
switching can also be advanced or retarded about the calculated sunrise (or sunset) time in 10-minute increments - up to a maximum of 90 minutes. A manual override of the output status allows for maintenance or one- off events. With a 16 A 250 V
AC rated output contact and a 120 A 5 ms peak current rating, the Astro time switch is capable of directly switching 2000 W halogen, 750 W compensated fluorescent, 200 W CFL or LED lamp loads and AC15 loads up to 750 VA. The integral back-up battery, which is easily
replaceable from the front, features an automatic power save mode which helps extend battery life.
Finder |
www.findernet.com Components in Electronics
Dialog Semiconductor has launched the industry’s first digital pulse width modulation (PWM) controller that can efficiently drive low-cost, 10W power bipolar junction transistor (BJT) switches to reduce the BOM cost in 5V/2A smartphone adapters and chargers. The iW1679 has been designed to allow designers to replace field effect transistors (FETs) with lower-cost BJTs and address the market trends for lower standby power and higher light-load and active average efficiency in smartphones, media tablets and consumer electronic products.
The iW1679, developed by the
company’s Power Conversion Business Group, formerly iWatt, reduces BOM costs while at the same time achieving high efficiency through the use of Dialog’s adaptive multi- mode PWM/PFM control that dynamically changes the BJT switching frequency. This optimises the system to improve light-load efficiency, power consumption and EMI. The device provides high, 83% active average efficiency, maintains high efficiency at loads as light as 10%, and achieves <30mW no-load standby power with fast standby recovery time. This enables designers to meet or exceed emerging global energy standards, including the proposed stringent European CoC version 5, which is anticipated to require 76% active average efficiency and high light load efficiency down to 10% loads, as well as the proposed U.S. DoE regulation, expected to require 79% active average efficiency, and the Energy Star EPS 2.0, which will require 73% active average efficiency.
While BJTs reduce costs compared to FETs, their drive requirements are more complex. The iW1679 addresses this by using Dialog’s
patented digital control technology to actively modulate the BJT base current drive. This optimises performance and improves efficiency by keeping the BJT out of saturation. Since BJTs have softer switching compared to FETs, they generate less noise and, therefore, have inherently lower EMI. The iW1679 features Dialog’s EZ-EMI, an internal EMI technique that uses valley mode switching to further reduce EMI, simplify manufacturing and minimising the need for external EMI filtering components. It also includes a proprietary switching mode that results in no audible noise from the controller. The iW1679 offers a user-configurable, four- level cable drop compensation option to eliminate the ordering and inventory challenges of stocking multiple product versions for various output voltage needs. It comes in a standard, low-cost, 8-lead SOIC package and offers full protection from fault conditions, including output short-circuit, output over-voltage, output over-current, and over-temperature protection.
Dialog Semiconductor |
www.dialog.com www.cieonline.co.uk
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