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1000W Medical AC-DC Power Supply
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1000W Medical AC-DC Power Supply

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To introduce SWS1000L medical AC-DC power supply

To introduce SWS1000L medical AC-DC power supply

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  • 1000W Medical AC-DC Power Supply
  • Welcome to the training module on 1000W Medical AC-DC Power Supply. This training module will introduce SWS1000L medical AC-DC power supply.
  • The SWS series is available in a large number of nominal output voltages; ranging from 3.3V, all the way to 60V. The unit can deliver 1000W over a wide AC input voltage range for worldwide use. To operate reliably in outdoor environments a wide operating temperature range is necessary. SWS1000L is designed to operate between -20 º C to 74 º C. At its max. temperature, 74 º C, 50% of the max. power rating is guaranteed. The power supply has both medical and ITE safety certification.
  • The power supply carries certification to UL60601-1 and has 4000 Volts AC input to output isolation, allowing it to be used in the vicinity of patients. When used with a 115Volt AC line, the leakage current is only 100 micro amps, allowing the system designer the flexibility to incorporate other AC powered equipment without using up his leakage current "allowance". For Information Technology Equipment, the unit carries certification to UL, CSA and EN 60950-1 and of course carries the CE mark for the Low Voltage Directive. Complying fully with EN/UL60601 safety standards including low earth leakage current and reinforced isolation, SWS1000L will also meet class B EMI and is the ideal choice for your medical power needs.
  • The SWS1000L comes with a great many features. They are remote sense for load cable compensation, opto isolated remote on/off, a DC Good and Fan Fail signal (also isolated from the output) and of course over current, over voltage and over temperature protection.
  • Up to 5 units can be connected in parallel when the single wire current share is utilized, to obtain an output power of 4,500W. Units of course can also be used in series. The output can also be remotely programmed using an external resistance or voltage. A 12V 100 mA auxiliary supply is available to drive external circuits. Variable speed, high reliability fans are utilized in the design for both lower acoustical noise and longer fan life. Active power factor correction is incorporated into the design to meet EN61000-3-2.
  • As mentioned earlier, the SWS1000L can be externally programmed over quite a wide output range. For example the SWS1000L-60 can be adjusted over an impressive 12 volt to 66V range. See the installation manual for more details. Output voltage can be varied by applying an external voltage to “PV” terminal and “COM” terminal. The SWS1000L can be used as a variable power supply for test equipment at a fraction of the price of a laboratory unit.
  • A cleverly designed input terminal block incorporates captive screws and a finger guard. The captive screw design will even accept circular ring crimp tags!
  • Other features of the SWS1000L is its compact size, just 2.4" by 5.91" by 9.45“, so it can be mounted in 2U or smaller locations. The compact size is ideal for application including electronic display, vending machines and self service kiosks. It has a 3 year warranty, meets MIL-STD-810F shock and vibration, weights only 2.3kg and meets the EN61000-4 immunity tests.
  • The part numbering sequence for the SWS1000L Series is shown in the page. To view the full datasheet for the SWS series, please visit TDK-Lambda’s website at: http://www.us.tdk-lambda.com/lp/products/sws-series.htm
  • The SWS1000L can be configured as series operation. To increase output voltage, two series configurations are used as shown in the figures. The left configuration is for one load, the right one for two loads that are in series as well.
  • Two methods are used to configure the SWS1000L in parallel operation. Connect the two PC terminals together and the two COM terminals together. The current balancing function activates and output current of each power supply is equivalently supplied to load. Wires to PC terminals, COM terminals shall be as short as possible. It is also important to use same length and to have them twisted. This configuration is shown on the left diagram. The right diagram shows the power supplies being used as a backup power supply. When one of power supply fails, the remaining non-failure power supplies continue to maintain the output.
  • Thank you for taking the time to view this presentation on “ 1000W Medical AC-DC Power Supply” . If you would like to learn more or go on to purchase some of these devices, you may either click on the part list link, or simply call our sales hotline. For more technical information you may either visit the TDK Lambda site, or if you would prefer to speak to someone live, please call our hotline number, or even use our ‘live chat’ online facility. You may visit Element 14 e-community to post your questions.


  • 1. 1000W Medical AC-DC Power Supply
    • Source: TDK Lambda
  • 2. Introduction
    • Purpose
      • To introduce SWS1000L medical AC-DC power supply
    • Outline
      • SWS1000L power supply overview
      • Key features
      • Part numbering
      • Series / Parallel operation
    • Content
      • 13 pages
  • 3. SWS1000L Overview
    • 3.3V, 5V, 12V, 15V, 24V, 36V, 48V and 60V Outputs
    • 1000W Output Power
    • 85 to 265VAC Wide Range Input
    • Medical & ITE safety certifications
    • -40 º C to 74 º C operating temperatures (de-rate >50 º C)
  • 4. SWS1000L – Certifications
    • The SWS1000L is certified for Medical & ITE use
    • Medical
      • UL60601-1 certification
      • 4000VAC Input to Output Isolation
      • 100uA leakage current at 115VAC, 300uA at 265VAC 63Hz
    • ITE (Information Technology Equipment)
      • UL, CSA, EN60950-1 certifications, CE Mark
    • Class B EMI, conducted and radiated emissions
  • 5. SWS1000L – Fully Featured
    • Remote sense - Compensates for load cable drops
    • Remote On/Off
      • Electronically turn the output on and off
      • Opto-coupled output – floating from output voltage
    • DC Good signal and fan fail signal – also floating
    • Overcurrent, overvoltage protection
    • Overtemperature protected
      • Cycle AC input or toggle remote on/off to reset
  • 6. SWS1000L – Fully Featured cont’d
    • Current Share – single wire connection
      • Can connect up to 5 units, for a total of 4,500W
    • Resistance or Voltage Output Remote Programming
      • More details later
    • 12V 0.1A auxiliary voltage
      • Use for driving auxiliary circuits like DC Good
    • Variable speed fans for lower acoustical noise
    • Active Power Factor Correction (PFC)
  • 7. SWS1000L – Remote Programming
    • The output voltage can be remotely adjusted
      • Use external voltage or the auxiliary output and resistors
      • Use the PV signal and connect
    • The adjustment range depends on the output
    • The SWS1000L can be used as a variable power supply!
  • 8. SWS1000L – Input Terminal Block
    • Clever design for the input terminal block
    • Captive screws will even accept ring terminals
      • Never lose the screws!
    • Built in finger guard to avoid electrical shock
  • 9. SWS1000L – Other Features
    • Compact Size
      • 2.4" tall, 5.91" wide, 9.45" long
    • Three year warranty
    • MIL-STD-810F shock and vibration
    • 2.3kg in weight
    • EN61000-4 immunity
  • 10. SWS1000L Part Numbering
      • SWS1000L - 24 /CO2
    • Series
    • Output Voltage
    • (Nominal)
    • 3.3V
    • 5V
    • 12V
    • 15V
    • 24V
    • 36V
    • 48V
    • 60V
    • Option
    • /CO2 for conformal coating
  • 11. Series Operation The function of remote sensing is not used.
  • 12. Parallel Operation
    • Increasing the output current
    • Adjust the output voltage of each power supply to be same value.
    • Use same length and type of wires for all load lines.
    • The sum of output current values does not exceed a value obtained from (Rated current per unit × Number of units × 0.9)
    • Parallel operation is possible up to 5 units.
    • Back Power Supply
    • Adjust the output voltage of each power supply to be same value.
    • Set power supply output voltage higher to compensate the forward voltage drop of diode.
  • 13. Additional Resource
    • For ordering SWS1000L power supply, please click the part list or
    • Call our sales hotline
    • For more product information go to
      • http://www.tdk-lambda.com/products/sps/ps_unit/sws_l/indexe.html
    • Visit Element 14 to post your question
      • www.element-14.com
    • For additional inquires contact our technical service hotline or even use our “Live Technical Chat” online facility