Hello all,
As title, my client used DCP021512 to be the isolated power for gate drive optocoupler, but it burnt out at test.
Vin:15V , Vout:15V, Iout:0.025A
The schematic is as below:
Thanks & Best regards
DCP02 series cannot be used with IGBT gate driver circuitry in DC continuous mode or frequency controlled with voltages exceeding SELV limit. (m See
See DCP02 Isolation statement from DCP02 specification paragraph 8.3 Description Isolation attached.6558.Pages from dcp02spec. Isolation statement. pdf.pdf
Isolation Voltage applications. For a device that has no specific safety agency approvals (operational isolation), the continuous voltage that can be applied across the part in normal operation is less than 42.4 VRMS, or 60 VDC. Ensure that both input and output voltages maintain normal SELV limits.
The isolation test voltage represents a measure of immunity to transient voltages.
WARNING does not use this device as an element of the safety Isolation system when SELV is exceeded.
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 isolation 1 second 1kv production 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 AC transient between Vin(-) and Output ( ground) . . The primary and secondary transformer wires will contact each other separated by magnet wire over-coating. The transformer wires are single coating material and not dual coated. The UL listing, E199929, voltage limits are SELV or 60VDC continuous or 42V transient peak.
Specification DCP02 Electrical Characteristics paragraph 7.5 identifies under isolation limits maximum Continuous working voltage
