Delta PSU circuit obfuscation via renamed ICs DDA000 (DDA005, DDA002B, DDA010, etc.)

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  • Chungalin
    Badcaps Veteran
    • Jul 2014
    • 422
    • Spain

    #1

    Delta PSU circuit obfuscation via renamed ICs DDA000 (DDA005, DDA002B, DDA010, etc.)

    This is not a practical case nor a repair thread, but a reverse engineering one, and perhaps sometime it will be useful at repair level.

    I'm sure you've detected in recent years several cases of Delta TV PSU's with strangely named IC's in the pattern DDA000. It seems a way of obfuscating circuit design so it's harder to... repair? clone? reverse engineer? As expected, there's no datasheet at all under these names, but people is finding their equivalents, because all of them are known and documented IC's under a different name. And the most surprising fact is that they come from several manufacturers, not just one.

    These are the ones I've documented so far:

    DDA001AG, SOIC-16 narrow, switching controller, half-bridge, ON Semiconductor
    DDA002B, SOIC-20 wide (pin17 removed), switching controller, half-bridge, ON Semiconductor
    DDA005DCQR (marked DDA005), SOT-223-6, adjustable linear regulator, possibly Texas Instruments
    DDA006, SOIC-16 narrow, unknown function, Texas Instruments
    DDA010, DIP-8, switching regulator, possible equivalent to ICE2QR0665, Infineon
    DDA014, SOP-18, switching controller, half-bridge, possible equivalent to SSC9502S, SanKen Electric

    To start of, I'm interested in breaking DDA005 with your help. I've found it in a Delta DPS-214CP PSU, inside a Grundig LED TV 40VLE6142C (this one has a DDA010, DDA014 and DDA005). It's a SOT-223-6, with 6 pins, atually 5, because tab is the 6th. It's for sure an adjustable linear regulator. Input is 18V and output is 15V. Adjusting resistors: R1=11kΩ and R2=1kΩ. It must be a Texas Instruments TPS... something, with output range within 1~20V. I'm sure of this because schematic names it as DDA005DCQR, and that "DCQR" is the Texas termination for their linear regulators with SOT-223-6 packaging. Any idea of which one could it be? I think there're several candidates.

    Of course, this thread aims to document other DDA's that I haven't encountered yet.
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  • avsupertek
    New Member
    • Oct 2017
    • 1
    • USA

    #2
    Re: Delta PSU circuit obfuscation via renamed ICs DDA000 (DDA005, DDA002B, DDA010, et

    RE: DDA010: The ICE2QR0665 will definitely replace the DDA010 and works well in the Sony XBR-65X850E. Mine also had a shorted 13Volt zener across the DDA010 power source pins.

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