Part Datasheet Review and Verification

flux

4:15

Project

File

PCB Layout

Schematic

Review.

Extract.

Using Schematic Tool.

Looking for "part description and key features" in da2032.pdf

Looking for "applications or intended controller reference (e.g., LT3750)" in da2032.pdf

Looking for "electrical characteristics table" in da2032.pdf

Looking for "absolute maximum ratings" in da2032.pdf

Looking for "recommended operating conditions" in da2032.pdf

Looking for "pinout or pin descriptions, primary and secondary pin numbers" in da2032.pdf

Looking for "turns ratio, inductance, leakage inductance, DCR primary and secondary" in da2032.pdf

Looking for "isolation voltage or hipot rating" in da2032.pdf

Looking for "saturation current or current ratings" in da2032.pdf

Looking for "package dimensions mechanical drawing" in da2032.pdf

Looking for "recommended land pattern or pad layout" in da2032.pdf

Looking for "operating temperature range and storage temperature" in da2032.pdf

Looking for "notes about polarity dots and pin numbering" in da2032.pdf

Using PCB Layout Tool.

Looking for "pin numbering diagram showing which pins are primary and which are secondary for DA2032-AL" in da2032.pdf

Looking for "text identifying which specific pin numbers belong to primary windings and which to secondary for DA2032-AL" in da2032.pdf

Looking for "note: Primary windings to be connected in parallel on PC board - identify which pins connect together" in da2032.pdf

Looking for "Which pin numbers are secondary for DA2032-AL" in da2032.pdf

Looking for "Which pin numbers are primary for DA2032-AL" in da2032.pdf

Looking for "diagram labels Primary and Secondary next to pin numbers list" in da2032.pdf

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

SECONDARY_1 — Pin Number: 1
PRIMARY_1 — Pin Number: 2
PRIMARY_2 — Pin Number: 3
PRIMARY_3 — Pin Number: 4
PRIMARY_4 — Pin Number: 5
PRIMARY_5 — Pin Number: 6
PRIMARY_6 — Pin Number: 7
PRIMARY_7 — Pin Number: 8
PRIMARY_8 — Pin Number: 9
PRIMARY_9 — Pin Number: 10
PRIMARY_10 — Pin Number: 11
SECONDARY_2 — Pin Number: 12

Footprint (pads present on the layout)

Pads found: SECONDARY_1, PRIMARY_1..PRIMARY_10, SECONDARY_2 (12 total)

Step 2 — Datasheet URL check

A datasheet URL is already set for this part (https://www.coilcraft.com/pdfs/da2032.pdf). No changes were needed.

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

11 days

Ready.

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