VisionPower

VisionPower - Custom power supplies

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FAQs on Advanced TCA product range

  1. Do I need to programme the A-D converter?
  2. Do I have to communicate with the module using I2C?
  3. What is the rating of the fuses?
  4. How quickly can the or-ing FETs react to a shorted condition on the 48V input?
  5. If a shorting condition occurs on 48VA, will the 48VA FET open fast enough so that it will not to cause an open to the fuse for 48VB?
  6. What loading condition was used to guarantee meeting CISPR 22 conducted emissions?
  7. How is current and voltage monitored?
  8. What voltages are being monitored for both current and voltage?
  9. Can the inrush current to both the 3V3 and 12V be adjusted externally?
  10. Is shelf ground and logic ground connected together with any resistive elements?
  11. Is there any fault isolation/detection of the I2C bus?
  12. Can other voltages along with 3.3V be provided (for instance 5V, 2.5V)?
  13. Is this module repairable or replaceable (for instance replacing the fuses)?
  14. Is this product considered to be lead free and RoHS-6 Compliant? If not what date will it be targeted?
  15. Is the IPSY200-12-47 currently available for small quantity delivery (20 pcs), if not when? When is it targeted for production?
  1. Do I need to programme the A-D converter?

    No. The A to D converter and the intermediate bus monitor are pre-programmed by VISIONPOWER.

  2. Do I have to communicate with the module using I2C?

    I2C is used to communicate with the IPSY however this is not required to enable the unit. To enable the outputs of the unit, all that is required is to pull down the Intermediate Bus enable signal.

  3. What is the rating of the Fuses?

    All are Little Fuse nano range.
    Enable A and B are 375mA
    -48VA and B are 8A (I2t rating 20 nom)
    -48V ARTN and -48VBRTN are rated at 10A. (I2t rating 26 nom)

  4. How quickly can the or-ing FETs react to a shorted condition on the 48V?

    The FETs switch off as soon as the input voltage falls below 40.5V nominal. The delay is theoretically less than 1usec.

  5. If a shorting condition occurs on 48VA, will the 48VA FET open fast enough so that it will not to cause an open to the fuse for 48VB?

    We routinely test this function using a crowbar circuit on the input supply line.

  6. What loading condition was used to guarantee meeting CISPR 22 conducted emissions?

    We test at 200W of input power (195W on the Intermediate bus and 10W on the 3V3 IPMI supply.)

  7. How is current and voltage monitored?

    A differential A to D converter is used to monitor a scaled version of all input lines after the fuses. An in-line series resistor senses current. This is amplified via a differential amplifier and fed into a differential A to D converter. The output of the A D converter is transferred to the logic side via an opto isolated I2C bus.

  8. What voltages are being monitored for both current and voltage?

    48VA wrt 48VArtn,
    48VB wrt 48VB rtn,
    Enable A,
    Enable B,
    Common Total Iin.

  9. Can the inrush current to both the 3.3 and 12V be adjusted externally?

    No

  10. Is shelf ground and logic ground connected together with any resistive elements?

    No

  11. Is there any fault isolation/detection of the I2C bus?

    No

  12. Can other voltages along with 3.3V be provided (for instance 5V, 2.5V)?

    5V BLUE LED supply is now fitted as standard. Consult factory for other options.

  13. Is this module repairable or replaceable (for instance replacing the fuses)?

    On the unlikely event of a product failure or damage, in order to protect the warranty, VISIONPOWER request the product be returned to our factory. VISIONPOWER do allow fuses to be replaced by a trained operator

  14. Is this product considered to be lead free and RoHS compliant? If not what date will it be targeted?

    Yes from 1st July 2006, the product is lead free and 100% RoHS-6 compliant

  15. Is the IPSY200-12 currently available for small quantity delivery (20 pcs), if not when? When is it targeted for production?

    Yes, the product is fully available in both sample and production quantities.

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Custom power supply units

VISIONPOWER designs and builds custom power supplies to your specification.


VISIONPOWER quality systems are registered to ISO 9001 for the design, development and supply of high reliability electronic power supplies.

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