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DCH01 Series / reinforced insulation level

K.Yaita
Guru 29690 points

Hi Team,

Does DCH01 Series support reinforced insulation level ?
I believe it doesn't but would like to confirm just in case.

Best Regards,
Yaita / Japan disty

  • 0
    TI__Mastermind 38230 points

    Kensuke:

    DCH 01 series  3KV  1 second isolation test, UL60950 does not have reinforced insulation.

    The external continuous voltage difference limits are defined as voltages as measured between VIN (-) and Vout (-) ground). The converter is designed as ground fault isolation device. It is not designed to operate with a continuous voltage isolation barrier at greater than 60VDC. The 3KV isolation 1 second test validates only the magnetic coating separation between primary and secondary transformer wire.

    The maximum potential difference ( Vin(+) to Vout ground ) as referenced to  a common ground is limited to continuous 60V DC or 42V Peak  transient between Vin(-) and Output ( ground) . . The primary and secondary transformer wires are coincidental and contact each other separated by magnet wire over-coating. The transformer wires are single coating material and not dual/reinforced coated insulated wire. . The UL listing, E199929-A2 , voltage limits are SELV or 60VDC continuous or 42V transient peak.

    Tom

  • 0 in reply to Tom Guerin
    Guru 29690 points

    Hi Tom-san,

    Thank you for your reply!

    >DCH 01 series  3KV  1 second isolation test, UL60950 does not have reinforced insulation.
    Does it mean DCH01 series is certified UL60950 under 3KV(1 second) isolation test?
    I would also like to confirm if "UL60950 does not have reinforced insulation" means DCH01 series isn't certified UL60950 under reinforced insulation.

    I apologize if this question is elementary question..

    Best Regards,
    Yaita

  • 0 in reply to K.Yaita
    TI__Mastermind 38230 points

    Kensuke-san:

    DCH0x product specification page 9,function description under  isolation voltage: 

    The DCH01 series of DC/DC converters are 100% production tested at 3.5 kVDC for 1 second. The isolation test

    voltage represents an operational isolation to transient voltages and should not be relied upon for safety

    isolation.

    The continuous voltage that can be applied across the DCH01 during normal operation must be < 60 VDC, within

    SELV limits.

    1.

    UL listing, E199929-A2 UL60950  safety voltage  limits are SELV or 60VDC continuous or 42V transient peak voltages  The maximum potential difference ( Vin(+) to Vout ground ) as referenced to  a common ground is limited to continuous 60V DC or 42V Peak  transient between Vin(-) and Output ( ground) . . The primary and secondary transformer wires are coincidental and contact each other separated by magnet wire over-coating. The transformer wires are single coating material and not dual/reinforced coated insulated wire. . :

    Tom