Roberts Warr News

ANOTHER NEW ENVIRONMENTALLY FRIENDLY EXTERNAL DESKTOP ADAPTER FROM ROBERTS WARR.

Neil — Tue, 13 Dec 2011 11:50:02 +0000

ROBERTS WARR ELECTRONICS LTD introduces another External Desktop Power Supply from HITRON ELECTRONICS CORPORATION of Taiwan.

The HEMG40(40W Green Medical and ITE use) Power Supply replaces the 34 series of External Power Supplies and takes its place in a New range covering 10 – 250W.

HEMG40 series feature both ITE (IEC60950-1) and Medical (IEC60601-1) standard, offer very low “No Load Power Consumption” of less than 0.3W, high efficiency level of up to 88% for certain variants and comply with Energy Star Level V. A Power density of 3.19W per cubic inch has been achieved.

HEMG40 accept Input Voltages between 90 – 264Vac and are available in Class I (IEC320 C14 Input connector) or Class II (IEC320 C8 Input connector)

Output Voltages are available between 12 – 24Vdc making them suitable for a diverse range of electronic equipment. Safety features include Overload, Overvoltage and Short circuit protection.

90 – 264Vac Wide acceptance AC Input
Meets both Medical IEC60601-1 and ITE IEC60950-1
Desktop format with either C14 or C8 Input Connector
Operating temperature range 0 to +40 degrees C
High efficiency of up to 88%
No Load power Consumption <0.3W
Pass Energy Star Level V and CEC Level IV
Built in Overload, Over Voltage and Short Circuit protection
EMI Meets EN55011 & EN55022 / FCC Class B
Dimensions 110 x 58 x 32.3mm

External Green Medical/ITE External Desktop Adapters Range

For further details of this and the entire range of HITRON POWER SUPPLIES contact:

ROBERTS WARR ELECTRONICS LTD

www.robertswarr.com

sales@robertswarr.com

telephone ++44(0)1404 841648

fax ++44(0)1404 841575

“IN POWER FOR 27 YEARS – LONGER THAN YOUR AVERAGE POWER SUPPLIER”

ANOTHER NEW GREEN POWER EXTERNAL DESKTOP ADAPTER FROM ROBERTS WARR.

Neil — Fri, 09 Dec 2011 15:00:53 +0000

ROBERTS WARR ELECTRONICS LTD introduces another External Desktop Power Supply from HITRON ELECTRONICS CORPORATION of Taiwan.

The HEMG24 (24W Green Medical and ITE use) Power Supply replaces the HES24 and HES22 series of External Power Supplies and takes its place in a new range covering 10 – 250 Watts.

HEMG24 series feature both ITE (IEC60950-1) and Medical (IEC60601-1) standard, offer very low “No Load Power Consumption” of less than 0.3W, high efficiency level of up to 88% for certain variants and comply with Energy Star Level V. A Power density of 1.92W per cubic inch has been achieved.

HEMG24 accept Input Voltages between 90 – 264Vac and are available in Class I (IEC320 C14 Input connector) or Class II (IEC320 C8 Input connector)

Output Voltages are available between 5 – 24Vdc making the HEMG24 suitable for a diverse range of electronic equipment. Safety features include Overload, Overvoltage and Short circuit protection plus Over Temperature protection.

90 – 264Vac Wide acceptance AC Input
Meets both Medical IEC60601-1 and ITE IEC60950-1
Desktop format with either C14 or C8 Input Connector
Operating temperature range 0 to +40 degrees C
High efficiency of up to 88%
No Load power Consumption <0.3W
Pass Energy Star Level V and CEC Level IV
Built in Overload, Over Voltage, Short Circuit and Over Temperature protection
EMI Meets EN55011 & EN55022 / FCC Class B
UL, CB and CE Approved
Dimensions 110 x 58 x 32.3mm

External Green Medical/ITE External Desktop Adapters Range

For further details of this and the entire range of HITRON POWER SUPPLIES contact:

ROBERTS WARR ELECTRONICS LTD

www.robertswarr.com

sales@robertswarr.com

telephone ++44(0)1404 841648

fax ++44(0)1404 841575

“IN POWER FOR 27 YEARS – LONGER THAN YOUR AVERAGE POWER SUPPLIER”

NEW ENVIRONMENTALLY FRIENDLY EXTERNAL DESKTOP ADAPTER FROM ROBERTS WARR.

Neil — Thu, 08 Dec 2011 10:33:03 +0000

ROBERTS WARR ELECTRONICS LTD introduces its latest External Desktop Power Supply from HITRON ELECTRONICS CORPORATION of Taiwan.
The HEMP250G Range (250W Green Medical and ITE use) Power Supply is the most powerful in a range covering 10 – 250W.

HEMP250G Series feature both ITE (IEC60950-1) and Medical (IEC60601-1) standard, offer very low “No Load Power Consumption” of less than 0.5W, high efficiency level of up to 89% for the 12V variant and comply with Energy Star Level V. A Power density as high as 3.78W per cubic inch has been achieved.

HEMP250G accept Input Voltages between 90 – 264Vac and incorporate Power Factor Correction(PFC) enabling compliance with Harmonic requirement per EN61000-3-2.

Output Voltages are available in 12V, 24V and 48Vdc making them suitable for a diverse range of electronic equipment. Safety features include Overload, Overvoltage and Short circuit protection plus Over Temperature protection.

• 90 – 264Vac Wide acceptance AC Input
• Meets both Medical IEC60601-1 and ITE IEC60950-1
• Quiet Fanless design in a 190 x 95 x 48mm case
• Operating temperature range 0 to +40 degrees C
• High efficiency of up to 89% for 12V model
• Built in active PFC PF>0.96
• No Load power Consumption <0.5W
• Built in Overload, Over Voltage, Short Circuit and Over Temperature protection
• EMI Meets EN55011 & EN55022 / FCC Class B

External Green Medical/ITE External Desktop Adapters Range
• HEMG10
• HEMG24
• HEMG40
• HEMG49
• HEMP150G
• HEMP250G

For further details of this and the entire range of HITRON POWER SUPPLIES contact:

ROBERTS WARR ELECTRONICS LTD
www.robertswarr.com
sales@robertswarr.com
telephone ++44(0)1404 841648
fax ++44(0)1404 841575

“IN POWER FOR 27 YEARS – LONGER THAN YOUR AVERAGE POWER SUPPLIER”

GREAT NEW DC/DC COMPACTPCI POWER SUPPLY FROM ROBERTS WARR

Neil — Wed, 06 Jul 2011 14:44:10 +0000

ROBERTS WARR ELECTRONICS LTD announces a newly developed 382 Watt DC/DC CompactPCI Power Supply from HITRON ELECTRONICS CORPORATION of Taiwan.
The HDC350P-24B-490 has industry-standard size dimensions of 6U x 8HP for both industrial and high-availability telecom applications.

This new design with DC input 18-36VDC (nominal 24Vdc) is ruggedly built to operate within -20°C to +50°C under a forced 600 LFM Airflow or -20°C to +70°C in 800 LFM Airflow complying with EMC Class A standard.

The HDC350P-24B-490 is fully compliant with PICMG and also has the customary +5VDC, +3.3VDC and +/-12VDC outputs which provides state-of-the-art power density and application flexibility to ensure successful implementation in its application.

With a power density of 3.45 Watts per cubic inch this new DC/DC model features higher than 81% efficiency. Output protection features include overvoltage, over temperature, overload and short circuit.

18-36VDC, Nominal input 24VDC-Telecom
382Watt output power
6Ux8HP with Standard PICMG® 47Pin Connector CompactPCI power supply
Operating Temp: -20°C to +50°C at full load with 600 LFM Airflow
-20°C to +70°C at full load with 800 LFM Airflow
Hot-Swappable and Active Current Limit
N+ 1 Redundancy operation
No Minimum loading requirement
High efficiency better than 81%
Built-in Overload, Overvoltage and Over Temperature protection

Other units in the Compact PCI range include models from 175 Watts to 500 Watts with a choice of AC or DC Input

HAC175P HAC175D HAC200P HAC202P HAC203P HAC250P HAC301P HAC400P HAC500

HDC201P HDC202P HDC203P HDC250P HDC301P HDC350P HDC400P HDC500P

For further details of this and the entire range of HITRON POWER SUPPLIES contact:

ROBERTS WARR ELECTRONICS LTD
www.robertswarr.com
sales@robertswarr.com
telephone ++44 (0)1404 841648
fax ++44 (0)1404 841575

“IN POWER FOR 27 YEARS – LONGER THAN YOUR AVERAGE SUPPLIER”

ECPE Runs Power Electronics Seminar in UK

Roberts Warr — Tue, 05 Apr 2011 07:53:30 +0000

June this year sees Cambridge University hosting one of this year’s two-day seminars from the European Centre for Power Electronics, on the subject of Power Semiconductor Devices & Technologies. The content will cover a wide range of important topics from the basic physics of the power supply to the use of wide band gap semiconductor material in the production of power switching devices.

This tutorial is aimed at engineers who are engaged in developing and specifying power supplies and want to improve their knowledge and understanding of power devices including the developments expected in power supply design and manufacture in the near future.

Dinner, lunch, coffee and soft drinks are supplied within the cost, and you can find details and information on how to book on the ECPE seminars here.

The EPCE was founded to raise awareness of the importance of power supply electronics, and runs seminars and events all over Europe. This Cambridge tutorial offers UK-based power supply and electronic professionals a great opportunity to keep up with technological advances and meet with and network amongst peers and students.

Industry Move from Analog to Digital Power Supply Components

Roberts Warr — Fri, 04 Mar 2011 11:28:26 +0000

A recently released IMS Research report, “The World Market for Semiconductors in Merchant Power Supplies”, predicts increasing growth for power supplies with digital control and management components, which in turn will lead to an increased demand for Silicon Carbide diodes, Digital Signal Processors and Microprocessors. A phasing out is predicted for of the older controlling components such as PFC controller ICs, analog controllers and regulators is also predicted.

Senior Market Analyst at IMS Research’s Power and Energy group, Ryan Sanderson, commented, “The impact on some analog component markets is somewhat offset by growth in the markets for components which have previously not been used in power supplies. The market for MPUs and DSPs in merchant power supplies is forecast to increase four-fold from 2010 to 2015, and the use of SiC diodes is increasing rapidly, particularly in the PFC stage.”

Roberts Warr as the UK distributor for Hitron power supplies will be in a good position to satisfy customer demand for this new technology as Hitron are in the final stages of developing a new range of power supplies which will use digital controls.

The report predicts that the total market for semiconductors and components in merchant power supplies withll be at $7 billion by 2015. AC-DC power supplies will account for just over 90% of this, with DC-DC power supplies accounting for less than 10%.

DC/DC controller ideal for industrial systems

Roberts Warr — Mon, 06 Dec 2010 09:54:58 +0000

Linear Technology has introduced the LTC3860, a dual output synchronous step-down DC/DC controller for applications in high-current power distribution and industrial systems, DSP and ASIC supplies.

The DC/DC controller has multiphase operation, differential output voltage sensing and high-frequency operation.

The controller works in conjunction with external power train devices such as Power Blocks and DrMos, as well as discrete N-channel Mosfets and associated gate drivers, enabling flexible design configurations.

Up to 12 phases can be paralleled and clocked out-of-phase to minimise input and output filtering for very high current requirements (up to 300A).

The differential amplifier provides true remote output voltage sensing of both Vout and ground terminals, enabling high-accuracy regulation where IR losses occur through vias, trace runs and interconnects.

The LTC3860 operates with a VCC voltage ranging from 3V to 5.5V, a VIN voltage (drain voltage for the high-side Mosfet) from 3V to 24V and produces output voltages from 0.6V to 5V.

The device’s voltage mode control architecture allows for a selectable fixed operating frequency from 250kHz to 1.25MHz or it can be synchronised over the same range with its phased-lock loop (PLL).

The output current is sensed by monitoring the voltage drop across the output inductor (DCR) for maximum efficiency or using a sense resistor.

Its adjustable current limit can be configured for very low sense voltages (0mV to 50mV) to minimise power loss.

The LTC3860’s current sharing loop enables accurate current sharing between phases across multiple ICs both DC and during a load transient.

Additional features include adjustable soft start or tracking, output over-voltage protection and two power-good output signals.

Furthermore, it maintains +/- 1 per cent reference voltage accuracy over an operating temperature range of -40C to 125C.

The LTC3860 is housed in a 32-lead 5 x 5mm QFN package and is available from stock.

This article was taken from: electronicstalk.com

DC/DC converter runs from TEGs and thermopiles

Roberts Warr — Thu, 02 Dec 2010 09:33:41 +0000

The LTC3109 is a step-up DC/DC converter and power-management IC that is designed to start up and run from millivolt input voltage sources such as thermoelectric generators (TEGs) and thermopiles.

The device’s proprietary auto-polarity topology allows it to generate usable power from input voltages as low as +/-30mV, enabling temperature differences as low as +/-1C to be harvested in lieu of traditional battery power.

This makes it ideal for energy-harvesting applications in which the input voltage polarity is unknown or is subject to reversal.

The LTC3109 uses two standard compact step-up transformers to provide a complete power-management solution.

Its 2.2V LDO can power an external microcontroler and its main output is pin selectable to one of four (2.35, 3.3, 4.1 or 5V) fixed voltages to power a sensor, data-acquisition circuits and/or a wireless transmitter.

A second switched output can be enabled by the host in order to power devices that do not have a micropower shutdown capability.

A storage capacitor provides continuous power, even when the input energy source is unavailable or intermittent.

The LTC3109’s low quiescent current of less than 7uA and high-efficiency design ensure the fastest possible charge times for the output reservoir capacitor.

The combination of the LTC3109’s leadless 4 x 4mm QFN-20 package (or leaded SSOP-20) and very small external components ensure a highly compact solution for energy-harvesting applications.

The LTC3109EUF is available in a 20-lead 4 x 4mm QFN package and the LTC3109EGN is available in a SSOP-20 package.

Industrial temperature grade versions, the LTC3109IUF and LTC3109IGN, are also available.

This article was taken from: electronicstalk.com

External 48 & 60 Watt power supply series meets latest energy standards

Roberts Warr — Mon, 29 Nov 2010 09:52:25 +0000

XP Power today announced the launch of the highly efficient single output AFM series of 48 & 60 Watt external AC-DC power supplies designed for a wide range of IT and medical equipment. The ranges offer output voltages of 12, 15, 18 and 24 VDC. Offering a typical efficiency of up to 88%, these highly efficient units meet the latest stringent energy efficiency standards such as Energy Star Level V, EISA2007 and CEC2008 in the United States and the ErP Directive for Europe. These standards define the average energy efficiency and the maximum no load power consumption. The AFM45 has a no load power consumption of less than 0.3 W, and the AFM60 less than 0.5 W.
In addition, the AFM series comply with the internationally recognized safety approval standards for IT and commercial equipment IEC60950-1 / UL60950-1 / EN60950-1. They also comply with the IEC60601-1 / UL60601-1 / EN60601-1 medical safety standards.
The units offer multiple input cable interface options allowing designers to specify either IEC320-C14, -C6 or -C8 connectors. The -C8 option provides a Class II grounding method. An optional cable restraining clip is also available.

XP Power is an Energy Star partner and has an approved certification facility that allows in-house testing for compliance to the energy efficiency standards.
To help designers keep up to date with the changing energy efficiency legislation, XP Power provides a number of useful resources and information on their web site. This can be found here: http://www.xppower.com/page.php?pagename=Energy&lang=EN
In addition, XP Power applications and support staff can assist customers in understanding the various “green” initiatives. To make contact with your local XP Power office or representative use the list of locations provided here: http://www.xppower.com/page.php?pagename=Offices&lang=EN
Applications support is also available via a live chat facility.
The AFM series is available from Newark or direct from XP Power.

This article was taken from: gotopower.net

AC/DC power supplies can be used in LED signage

Roberts Warr — Thu, 25 Nov 2010 10:18:10 +0000

TDK-Lambda’s ZWS-BAF series of PCB-type AC/DC power supplies is designed to meet the demands of a range of applications, including factory automation, test and measurement, and LED signage.

The devices combine high efficiency – even at low-load conditions – with a wide operating temperature range, small size and 10-year electrolytic capacitor life.

Offering features such as active power factor correction and high-input transient protection, the ZWS100BAF and ZWS150BAF series operate from a universal input of 85 to 265V AC or 120-370V DC.

Offered with a choice of output voltages from 3.3 to 48V, each model in the ZWS-BAF series can be adjusted by up to +/-10 per cent of its nominal voltage to accommodate non-standard system voltages.

In comparison with its first-generation ZWS-AF series, TDK-Lambda’s design of the ZWS-BAF PCB layout has minimised internal heat losses, resulting in smaller size.

The improved heat dissipation provides a wider operating temperature range of -10 to 70C, allowing 100-per-cent load operation in a 50C environment – efficiency of the ZWS150BAF-24 model reaches up to 90 per cent.

Over-current and over-voltage protection circuitry are standard features and an optional remote on/off is available.

With active power factor correction (PFC) that meets EN61000-3-2, the ZWS-BAF models have a 3kV AC input to output isolation and meet conducted and radiated EMC conforming to EN55011/EN55022-B, FCC-B, VCCI-B.

They are delivered with TDK-Lambda’s five-year warranty, are safety-approved to UL/CSA/EN60950-1 and EN50178 and carry the CE mark, according to the LV Directive.

This article was taken from: energeeringtalk.com