logo elektroda
logo elektroda
X
logo elektroda
Advanced Search
logo elektroda
Build faster with M5Stack »
Build faster with M5Stack » Stick • Unit • Cardputer
ADVERTISEMENT
Dostępna jest polska wersja

Czy wolisz polską wersję strony elektroda?

Nie, dziękuję Przekieruj mnie tam

DPS-130PP+2950298203 Circuit Diagram Inquiry

Ask a question on the Forum

User question

DPS-130PP+2950298203 circuit diagram

Artificial Intelligence Response

Direct answer to the question

• No publicly released full-schematic (pin-by-pin circuit diagram) for the Delta/Philips DPS-130PP power-supply board carrying the OEM code 2950298203 is known to exist.
• The unit is a 130 W multi-output SMPS that contains:
– an active Boost-PFC stage driven by Infineon ICE2PCS02
– a quasi-resonant main converter driven by Infineon ICE2QS02G (sometimes marked “2QS02G”)
– a small fly-back / standby converter around the Fairchild DDA010 (or equivalent)
• Service data, if any, is found only inside Philips / Delta NDA packages or in TV service manuals where the board is used (e.g. Philips 46PFL5507/5527).
• Practical repair therefore relies on datasheets, block diagrams from similar Delta supplies (DPS-145PP, DPS-126PP, etc.), and systematic SMPS troubleshooting techniques.

Detailed problem analysis

  1. Functional blocks
    a. EMI filter & Inrush limiter → bridge rectifier → 400 V bulk electrolytic (≈ 420 VDC)
    b. Boost-PFC (ICE2PCS02 + MOSFET IPA60R199CP + 8.2 µH boost inductor) – raises & regulates the bulk rail at ≈ 390–410 VDC, PF > 0.95
    c. Quasi-resonant (QR) flyback / forward converter (ICE2QS02G + planar transformer T801) – provides the main rails (12 V@6 A, 24 V@2 A typical)
    d. Stand-by flyback (DDA010 + T701) – generates permanently present 5 V_SB (≈ 5 V/1 A) to wake the set
    e. Secondary rectification & Pi-filters – Schottky diodes (MBR30H60, SBR20U60CT, etc.) and LC filters
    f. Feedback & protection – TL431 + opto-couplers (PC817-type) for each regulated rail, coupled to ICE2QS02G; over-voltage, over-current, & over-temperature shut-down paths

  2. Key controller behaviour
    • ICE2PCS02 starts as soon as Vcc >11 V (via start-up resistor string R610/611 from HV bus). It operates Continuous-Conduction-Mode (CCM) with average-current control.
    • ICE2QS02G starts from an auxiliary winding on T801 once the PFC rail is up; runs variable-frequency, valley-switch (QR) to reduce switching loss and EMI.
    • DDA010 keeps the 5 V_SB alive. As soon as the main µC in the TV asserts “PWR-ON”, a logic signal (often labelled PS-ON) enables the ICE2QS02G and turns on the PFC.

  3. Typical failure points
    • Bulged secondary electrolytics (ESR rise → ripple → set cycles or fails)
    • Open start-up resistors feeding ICE2PCS02 (PFC never starts, only 5 V_SB present)
    • Shorted MOSFET (IPA60R199CP) or bridge rectifier – blows input fuse immediately
    • Leaky opto or TL431 – output overshoot / shutdown tick noise
    • Dry-joints on transformer pins or heavy diodes – intermittent loss of rail

  4. Reverse-engineering tips without a schematic
    • Photograph both PCB sides and overlay component identifiers; map primary nets with a continuity beeper.
    • Download datasheets: ICE2PCS02, ICE2QS02G, DDA010 (or FAN7601), TL431. Their “Typical Application Circuits” cover ~80 % of what Delta used.
    • Identify test points:
    TP1 300 V raw DC; TP2 390–410 V PFC; TP3 5 V_SB; TP4 12 V; TP5 24 V
    • Use an isolation transformer + differential probes when scoping the primary.

  5. Measuring sequence (safe order)

    1. Ohmic check (power off, caps discharged) – fuse, bridge, MOSFET, diodes
    2. Power on through 60 W series bulb – monitors for bright flash (short)
    3. Measure 5 V_SB; if OK but no PFC rail, troubleshoot ICE2PCS02 section
    4. If PFC OK but no main rails, focus on PS-ON logic, ICE2QS02G Vcc (~15 V), and transformer primary pulses.

Current information and trends

• Infineon has replaced ICE2PCS02/ICE2QS02G with pin-compatible ICE3/MP and CoolSET™ families; new repairs may retrofit those devices.
• Modern TVs have begun migrating to single-stage LLC resonant boards using GaN FETs for >92 % efficiency; multi-output QR flyback units like DPS-130PP are gradually phased out.
• Industry trend: full digital PFC+LLC controllers (e.g., Infineon XDPP1100) and integrated planar transformers to shrink depth.

Supporting explanations and details

• Quasi-Resonant principle: the MOSFET is switched at the valley of the drain-source resonant waveform, \( v{DS} = 0 \), minimising turn-on loss \( P = \frac{1}{2} C{oss} V^2 f \).
• PFC average-current mode: inductor current sensed via 0.3 Ω shunt; ICE2PCS02 uses internal multiplier to shape current proportional to rectified line voltage.

Example component list excerpt (taken from field-photographs):
– C613 82 µF/450 V bulk cap, C661 4.7 µF/50 V Vcc, C852 2200 µF/16 V 12 V rail
– R650 0.3 Ω/2 W current sense; R750A/B 0.22 Ω parallel for LED-backlight current feedback.

Ethical and legal aspects

• Full schematic is intellectual property of Delta/Philips and distributed only under NDA; sharing it publicly would violate copyright.
• Working on primary circuitry exposes >400 V; compliance with IEC 60950/62368 safety procedures and proper PPE is mandatory.

Practical guidelines

  1. Obtain the TV service manual (e.g., 46PFL5507) – even if it shows only a block diagram, it gives test-point voltages.
  2. Replace all secondary electrolytics with low-ESR 105 °C parts before deeper fault-finding; it cures >50 % of cases.
  3. Always test the PFC MOSFET and diodes with a curve-tracer or multimeter diode mode before first power-up.
  4. If the set cycles (click-tick), scope the Vcc of ICE2QS02G: <10 V ripple = dried Vcc cap.
  5. For lack of parts, a complete DPS-130PP board from e-waste TVs is often cheaper than bench time; ensure revision (A, B) matches connector pin-out.

Possible disclaimers or additional notes

• Schematics circulating on some forums for “DPS-130PP-133” differ in connector mapping; always cross-check before swapping boards.
• Board may contain lead-free solder; rework at 350 °C with flux or alloying may be necessary.

Suggestions for further research

• Compare Delta DPS-145PP, DPS-126PP schematics (public) – topology is nearly identical and provides component values.
• Study Infineon application notes “AN-boost-PFC ICE2PCS02” and “AN-QR control ICE2QS02G” for in-depth design equations.
• Explore replacing the entire PSU with a modern 24 V + 12 V open-frame supply and a DC-DC module for standby as a long-term reliability upgrade.

Brief summary

A complete circuit diagram for the DPS-130PP (2950298203) is not released to the public. The supply consists of an ICE2PCS02-controlled PFC booster, an ICE2QS02G quasi-resonant main converter, and a DDA010 standby flyback. Repair is performed by referencing controller datasheets, similar Delta schematics, and systematic SMPS diagnostics. Observe all mains-safety rules, replace common-failure electrolytics, and verify PFC/start-up stages before troubleshooting the secondary rails.

User question

Which Diode is d602

Artificial Intelligence Response

Direct answer to the question

  • “D602” is only a reference designator; its actual type depends on the specific board/model. In SMPS/TV power supplies it is most commonly one of two things:
    • Primary RCD clamp (snubber) diode near the main transformer/MOSFET, typically an ultrafast 600–1000 V, 1–3 A axial part (e.g., UF4007/FR107/BYV26 series).
    • PFC boost rectifier diode on the heatsink, typically an ultrafast or SiC 600–650 V, 8–16 A TO‑220/TO‑247 part (e.g., STTH806D, RHRP860, IDH08S60C).
  • To be definitive I need your device make/model and the PSU board number (silkscreen like “DPS‑xxx”, “BN44‑xxx”, “EAXxxxx”, etc.) or a clear photo of the area around D602.

Detailed problem analysis

  • Why “D602” varies:
    • Reference numbers are assigned per schematic/PCB and do not map to a single diode type across products. Different manufacturers reuse “D602” for totally different functions.
  • How to identify which “D602” you have by tracing:
    1. If D602 connects between the main MOSFET drain and a series RC to the bulk HV rail or primary ground, and sits physically next to the primary transformer:
      • Function: RCD clamp/snubber for a flyback or QR flyback.
      • Typical spec: ultrafast recovery, VRRM 600–1000 V, IF(AV) 1–3 A, trr ≤ 75 ns. Common parts: UF4007, FR107, BYV26E, SF18. Package: DO‑41 or SMA/SMB if SMD.
      • Polarity: Cathode usually to MOSFET drain; anode to the RC clamp node.
    2. If D602 is a TO‑220/TO‑247 on a heatsink with one lead to the PFC inductor and the other to the + of the 400 V bulk capacitor:
      • Function: Boost PFC rectifier.
      • Typical spec: ultrafast or SiC, VRRM 600–650 V, IF(AV) 8–16 A, trr 15–50 ns (SiC has negligible recovery). Common parts: STTH806D, RHRP860, HFA16TB60S, IDH08S60C; SiC examples: C3D08065.
      • Polarity: Cathode to the ~390–410 V PFC bus; anode to the inductor/switch node.
    3. If D602 sits with a high‑value resistor and a small 1–4.7 nF/1 kV capacitor across the primary, it is almost certainly the RCD clamp diode (case 1).
    4. If D602 is on the secondary side tied to an output inductor and filter capacitors, it is a secondary rectifier (Schottky or ultrafast), and its voltage/current ratings follow that rail (e.g., 12 V rail: 40–60 V Schottky, 10–30 A).
  • Electrical checks (power removed, caps discharged):
    • Axial/SMD clamp diode: forward drop 0.5–0.9 V; reverse OL. Shorted clamp diode usually causes “ticking” or immediate MOSFET failure.
    • PFC boost diode: forward drop ~0.4–0.7 V (SiC ~0.9–1.2 V); reverse OL. Short will blow input fuse/bridge; open causes low/no PFC boost.
  • Selection rationale:
    • Clamp diode must be fast to minimize reverse‑recovery loss and ringing; a slow 1N4007 will overheat and elevate MOSFET stress.
    • PFC diode must withstand repetitive ~400 V reverse plus spikes; 600–650 V rating with low trr (or SiC) keeps losses and EMI down.

Current information and trends

  • Many newer PFC stages have moved to 650 V SiC diodes for lower loss and cooler operation, drop‑in replacing 600 V ultrafast parts.
  • On primary clamps, some designs replaced the RCD diode with a TVS clamp or switched to active‑clamp flyback (no series diode in the same spot). If your board uses a TVS, D602 may be a bidirectional/unidirectional TVS instead of a rectifier.

Supporting explanations and details

  • Reverse‑recovery time (trr) is critical: when the switch turns on, a slow diode still stores charge, causing current spikes and extra switching loss that can kill the MOSFET.
  • Voltage rating headroom: choose VRRM ≥ output or bus voltage plus ringing margin (typically ≥600 V on primary/PFC).

Ethical and legal aspects

  • Safety: Primary SMPS sections carry lethal voltages (up to ~400 VDC on bulk caps). Discharge capacitors with a resistor and verify with a meter before handling. Use an isolation transformer for live probing. Comply with local electrical safety standards when servicing.

Practical guidelines

  • If D602 is confirmed as the clamp diode:
    • Replace with UF4007/FR107/BYV26E or higher‑current UF540x class for thermal margin.
    • Also check/replace the clamp resistor (often 10–47 Ω, 1–2 W) and the HV capacitor (1–4.7 nF, 1–2 kV); aged caps raise stress.
  • If D602 is the PFC boost diode:
    • Use an 8–16 A, 600–650 V ultrafast or SiC diode in TO‑220/ITO‑220; add thermal compound and ensure firm heatsinking.
    • Inspect PFC MOSFET, inductor solder joints, and bulk cap ESR.
  • Do not substitute a slow rectifier (e.g., 1N400x, 1N540x) for any high‑frequency position.

Possible disclaimers or additional notes

  • Without the exact board/schematic, D602 cannot be identified with certainty. Visual confirmation or a model/board number is required for an exact part callout.

Suggestions for further research

  • Provide photos or the board P/N to look up the service manual or parts list.
  • If you know the controller ICs:
    • Flyback/QR controller (e.g., ICE2QS02G, NCP120x): points to RCD clamp diode case.
    • PFC controller (e.g., L6562/L6563/ICE2PCS0x): presence of a heatsinked diode near the PFC inductor points to the boost diode case.

Brief summary

  • D602 is a designator that most often denotes either the primary RCD clamp diode (typically UF4007‑class) or the PFC boost rectifier (8–16 A, 600–650 V ultrafast/SiC). Identify which by location and connections. Share your model/board number or a photo, and I’ll specify the exact part and vetted substitutes.

Ask additional question

Wait...(2min)
Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.
Report illegal content (Article 16 DSA)