Part Datasheet Review and Verification

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Here’s a complete, step-by-step execution and review for your DA2032-ALD part project.
Step 1 — Review available part information
  • MPN: DA2032-ALD
  • Manufacturer: COILCRAFT
  • Part Type: Transformers
  • Mount: Surface Mount
  • Package/Case Code: SMD
  • Description: COILCRAFT - DA2032-ALD - TRANSFORMER, FLYBACK, LT3750, SMD
  • Datasheet: https://www.coilcraft.com/pdfs/da2032.pdf
  • Pin count (from schematic symbol): 12 terminals
Schematic symbol pins and numbering
Footprint (pads present on the layout)
  • Pads found: SECONDARY_1, PRIMARY_1..PRIMARY_10, SECONDARY_2 (12 total)
Step 2 — Datasheet URL check
Step 3 — Datasheet scan and metadata summary Description and key features
  • Flyback transformer for Linear Technology LT3750/LT3751 capacitor charger controllers; designed for 3–24 V input and charging to 300 V.
  • Low-profile, surface mount; smaller footprint for this application.
  • Isolation: 1500 Vrms, 1 minute winding-to-winding; 750 Vrms winding-to-core.
  • MSL: 1; RoHS compliant terminations.
Electrical characteristics (DA2032-AL, 25°C)
  • Primary inductance: 10.0 µH ±10% at 0 A
  • Minimum inductance at Ipk: 9.0 µH
  • Peak primary current (Ipk): 3.0 A
  • DCR max: primary 0.013 Ω; secondary 1.60 Ω
  • Leakage inductance max: 0.150 µH
  • Interwinding capacitance: 67 pF
  • Turns ratio (pri:sec): 1:10
Absolute ratings / environmental limits
  • Winding-to-winding isolation: 1500 Vrms, 1 minute
  • Winding-to-core isolation: 750 Vrms
  • Ambient temperature: −40°C to +125°C
  • Storage temperature: component −40°C to +125°C; tape & reel −40°C to +80°C
  • Solder reflow: Max three 40 s reflows at +260°C (cool to room temp between cycles)
  • MSL: 1 (unlimited floor life at <30°C / 85% RH)
Recommended operating context
  • Intended with LT3750 (DA2032: 300 V, 3 A charge circuit example); input range 3–24 V; capacitor charge target 300 V.
  • Electrical specifications provided at 25°C.
Pinout and notes from datasheet
  • 12-pin package with a pin 1 polarity dot indicated on the mechanical drawing.
  • Note: “Primary windings to be connected in parallel on PC board.”
  • Measurement notes:
    • Capacitance measured at 100 kHz, 0.1 Vrms from pin 3 to pin 1 with all other pins shorted.
    • DCR and leakage inductance specified with primary windings connected in parallel (and secondary shorted for leakage).
Mechanical dimensions (DA2032-AL, select values)
  • Body length: 0.865 in (21.97 mm)
  • Body width: 0.590 in (14.98 mm)
  • Body height: 0.098 in (2.50 mm) max
  • Additional callouts in drawing include: 0.135 in (3.43 mm), 0.070 in (1.79 mm), 0.350 in (8.89 mm), 0.079 in (2.01 mm), 0.677 in (17.20 mm), 0.693 in (17.60 mm), 0.665 in (16.88 mm), 0.028 in (0.72 mm), 0.004 in (0.10 mm)
  • Dot indicates pin 1; “1–12, 6–7 pin orientation shown.”
Recommended land pattern (DA2032-AL, select values)
  • Drawing provided in datasheet with these pad dimension callouts:
    • 0.070 in (1.79 mm)
    • 0.130 in (3.30 mm)
    • 0.028 in (0.711 mm)
    • 0.100 in (2.54 mm)
    • 0.100 in (2.54 mm)
  • Pin 1 indicator is called out in the land pattern (“Dot indicates pin 1”).
Special application notes
  • Designed specifically for LT3750-based capacitor charger (DA2032 = 300 V, 3 A example circuit).
  • Two primary windings intended to be paralleled on the PCB per datasheet guidance.
Step 4 — Cross-check symbol and footprint vs datasheet What matches
  • Pin count: 12 in the schematic symbol and 12 pads in the footprint — matches the datasheet’s 12-pin package.
  • Numeric pin indexing: The symbol terminals have explicit Pin Number properties 1–12, which is required to align with datasheet numbering.
  • Symbol-to-footprint naming: Footprint pads share the same names as symbol terminals (PRIMARY_x, SECONDARY_x), ensuring logical name matching between symbol and footprint.
Items to verify/adjust
  • Pin role mapping (primary vs secondary):
    • The symbol labels Pin 1 as SECONDARY_1 and Pin 12 as SECONDARY_2.
    • The datasheet’s pinout diagram shows which numbered pins belong to the primary vs secondary windings, and includes instructions to parallel the primary windings. Because the PDF’s pinout diagram is graphical, text extraction is ambiguous. Please visually confirm that the roles associated with numeric pins 1–12 in your symbol match the datasheet’s diagram before production. If they don’t, rename the affected symbol pins to prevent wiring mistakes.
  • Primary windings parallel requirement:
    • The datasheet requires the primary windings to be connected in parallel on the PCB. Ensure your schematic usage notes or reference design clearly state which primary pins are to be paralleled, matching the datasheet diagram. Right now, the part project has no nets (expected), so this is a documentation/checklist item for downstream designs.
  • Pin 1 indicator on footprint:
    • The datasheet shows a dot for pin 1 on both the package drawing and land pattern. The current layout listing doesn’t expose silkscreen graphics; verify the footprint includes a clear pin 1 marker (silkscreen or copper chamfer) aligned with the datasheet orientation.
  • Land pattern dimensions:
    • The footprint node list confirms 12 pads, but the geometric details were not exposed via the layout query. Compare your pad sizes and row/column spacing to the datasheet’s recommended land pattern (e.g., 2.54 mm pitch callouts, pad widths of 0.028 in, etc.). Any deviation here can cause soldering or fit issues.
  • Clearance/isolation considerations:
    • With 1500 Vrms winding-to-winding isolation, ensure the footprint maintains adequate creepage/clearance between primary and secondary pad groups per your assembly voltage environment. The datasheet drawing dimensions help validate pad-row spacing; verify your footprint geometry aligns.
Conclusion
  • No hard mismatches were found for pin count or the presence of numbered pins.
  • Two critical items need human visual confirmation against the datasheet figure: which numeric pins are primary vs secondary (and correct parallel connections), and that the footprint’s land pattern and pin 1 marker match the datasheet’s recommended drawing.
  • Once these are confirmed or adjusted, the part should be safe for use with LT3750-based capacitor charger designs as intended.
@review DRC check
@help part properties
@file recheck pinout
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    COILCRAFT - DA2032-ALD - TRANSFORMER, FLYBACK, LT3750, SMD

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    DA2032-ALD

    COILCRAFT

    Transformers

    coilcraft.com/pdfs/da2032.pdf

    T

    Surface Mount

    SMD

    creativecommons.org/licenses/by/4.0/

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