Medical Power Supply & ITE Power Supply Expected To Be Big In The Market

Oct. 20, 2009 - PRLog -- Medical equipment is highly regulated and held to a higher level of safety than nearly all other types of equipment on the market since the performance of power supplies in such applications can be potentially life-saving. Medical equipment may be used on patients who are not able to respond to hazardous conditions or pain, an actual electrical connection between the equipment and patient may exist, and certain types of medical equipment function as life support, the failure of which could result in the death of the patient. The international safety standard for medical equipment is IEC60601-1 and there are three regional variants: EN60601-1 in Europe, UL60601-1 in the US, and CSA22.2 No 60601.1 in Canada. In all cases, the legislation covers protection against electric shock, protection against fire and mechanical hazards. IEC is the International Electrotechnical Committee. UL, CSA TUV and EN standards are derived from the IEC standards. It's important to consider how these standards affect the design and specification of power supplies used in medical applications.

The international medical standard IEC 60601-1 requires that maximum patient touch current (the current flowing between the patient and ground) from all such devices does not exceed 100 µA (microamps). Underwriters Laboratories has established standard UL 60601-1, which has similar requirements and serves as a industry standard in the U.S. and Canada. Generally speaking, hospitals in the U.S. and Canada will not allow medical electrical equipment to be used unless they meet UL standards. A maximum patient touch current of 100 µA is difficult to achieve using normal power strips and one conventional solution is to have a large isolation transformer in a box sitting on the floor near the wall outlet.

The leakage current requirements laid down by UL 60601 are difficult to meet. The maximum permissible earth leakage is 300µA for worldwide approvals, but this figure applies to the end-product as a whole, not just the power supply. To allow for additional leakage in other components it's a good idea to have an even lower leakage current from the power supply

Reinforced or double insulation in supplies which, for example, operate from a 240Vac main, must withstand a dielectric test at 4kVac for medical applications, whereas the corresponding figure for industrial use is just 3kVac. This difference must be taken into account when choosing a power supply. Those approved to less than 4kVac may be used in medical applications as part of a reinforced barrier, assuming the insulation provided by the power connector is regarded as a lesser "basic" or "supplementary" barrier.

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Medical equipment will often have lives dependent upon its reliable operation. Power supplies must not only deliver the specified electrical performance but must also meet stringent specifications with respect to isolation in order that patients and medical staff are protected from the risk of electric shock

ITE Power Supply Safety Certifications

ITE power supply safety certifications

Whether your ITE product is an open frame power connector for use in different application areas or an external power supply, a switching mode power supply or a linear one, all ITE suppliers need to obtain various certifications for accessing the market:

* CCC Mark (China)

* CE Marking (Europe)

* S Mark (Argentina)

* BSMI Certification (Taiwan)

* DENAN PSE Mark (Japan)

* SAFETY Mark (Singapore)

* GS Mark (Germany/EU)

* UL Mark (America)

* CSA Mark (Canada)

* C-Tick (Australia)

* FCC Marking (America)

Power-Win New Power Supply Product Introduction -- Medical 500W series ,

AD-A5 V3 200W series

, AD-A8 150W series.

The most recent advancement in medical power supply design is the implementation of digital control technologies. A number of manufacturers are replacing analogue "housekeeping" circuits (under voltage lockout, fan speed control or fan-less, customer signals, etc.) with microcontroller based solutions to achieve a reduction in parts count and circuit complexity.

The PW-500B series of 500 watts 500W single output power supply includes a grounded single output, single phase, switching power supply with active PFC and an optional active current share function utilizing a built-in high efficiency OR-ing FET diode and includes a good quality dual ball bearing Fan. This switching power supply meets safety, EMC, and RoHS requirements.

PW-M200A3-1Y120E single output switching adapter is designed to support a wide power input range, which allows it to support nearly any power requirement (90-264VAC full range); and it uses a standard IEC 320 power interface, making it easy to select the appropriate power cord for your needs. The 200W adapter's 20MHz bandwidth ripple & noise is measured by using 0.1 uF C.C. & 10uF/50V E.C. bypassed at the output connector. Regulation shows the percentage of absolute value of nominal output voltage and the total output power maximum is 200W. The 200W power supply unit should maintain its proper output voltage within voltage specifications for at least 16 milliseconds after losing input power under the condition of typical input with 100% loading. In addition, any overshoots during turn-on/turn-off is less than ±5% of the voltage regulation tolerance, no voltage of opposite polarity will be present on any output during turn-on or turn-off, and the temperature coefficient of all outputs is ±0.05% per degree C maximum.

PW-150A-1Y160H is a grounded, single phase, 150 Watts, Single Output Switching Adapter, with active PFC function and the dimension of 170.0(L) x 85.0(W) x 44.0(H)mm. In addition, it defines a worldwide safety requirement and electromagnetic compatibility requirement and meets CES, Energy-Star & RoHS requirements for desktop Switching Adapters. For safety requirements, it meets UL/CSA/TUV/IEC 60950-1 standards. Its maximum input voltage is 264 VAC and average efficiency over 85% with 25%, 50%, 75%, 100% load at 115/230 Vac, no-load input is smaller than 0.5W. It's nominal voltage is +16V and min. output current is OA, 9.28A formax, and ripple & noise for 320mV. 20MHz bandwidth ripple & noise is measured by using 0.1 uF C.C. & 10uF/50V E.C. bypassed at the output connector. The regulation shows the percentage of absolute value of nominal output voltage and the total output power maximum 150W. PW-150A-1Y160H power supply hold up time maintains its proper output voltage within voltage specifications for at least 16 milliseconds after losing input power under the condition of typical input with full loading.

The test for 150-watt single output switching adapter's electromagnetic compatibility is performed with host system and meets FCC (class B) and CE (class B requirements of EN55022 & EN55024 for EMS) requirements. For its reliability, MTBF is 140,000 hours min. at max. load for 25 degree centigrade ambient temperature and the burn-in test is 100% at max. load under 40+/-5 degrees centigrade.

Contact with Power-Win Technology Corp. (http://power-supply.ready-online.com/)

to Get Your Power Supply Business Done!

Reliable, High Efficiency, Good Quality, Certified Power Supplies

Medical Power Supply. Medical Open Frame Power Supply. AD/DC Switching Adapter. Open Frame Switching Power Supply. DC-DC Converter. Connector

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Power-Win Technology Corp., http://power-supply.ready-online.com/ located in Taiwan, has been a globally renowned OEM, ODM(70%) manufacturer and exporter of industrial power supplies for over 20 years. Power-Win, founded in 1989, is dedicated to manufacturing sophisticated power supplies. For more than 20 years, Power-Win has taken pride in providing their customers with the best quality of power supplies, the highest level of customer service, and on-time delivery.