Datasheet 3D Models

Flyback Transformers

for Linear Technology LT3750 / LT3751

Designed for use with Linear Technology LT3750 Capacitor Charger Controller
Smaller footprint than other transformers for this application
For charging capacitors to 300 V
Shown on LT3750 application note for use in a 300 V, 3 A charging circuit (DA2032); a 300 V, 6 A charging circuit (DA2033); and a 300 V, 9 A charging circuit (DA2034)
DA2033-AL and DA2034-AL are also specified for the LT3751 Controller.

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Count	Unit price
1	$4.24
200	$3.63
400	$3.15
1000	$2.46
2400	$2.12
5000	$1.94

For high volume or non-stock items, request a quote.

Packaging

D = 13" machine-ready reel

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Typical Application

Works with Analog Devices LT3750

Input Voltage	Fsw
3 V — 24 V	100 kHz

Specifications

Electrical specifications at 25°C.

Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min (µH)	DCR max 3		Leakage Inductance max (µH) 4	Turns Ratio	Capacitance max (pF)	Isolation Voltage (Vrms) 5
Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min (µH)	Pri (Ω)	Sec (Ω)	Leakage Inductance max (µH) 4	Pri : Sec	Capacitance max (pF)	Isolation Voltage (Vrms) 5
DA2032-ALD	10.0	9.0 @ 3 A	0.013	1.6	0.150	1 : 10	67	1500
DA2033-ALD	10.0	9.0 @ 5 A	0.015	1.1	0.144	1 : 10	76	1500
DA2034-ALD	10.0	9.0 @ 10 A	0.018	1.8	0.250	1 : 10	128	1500

Notes

When ordering, please specify packaging code: e.g. DA2034-ALD
Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc.
DCR is at 25°C with the primary windings connected in parallel. For other operating temperatures, use this DCR at Temperature calculator.
Leakage inductance is with the primary windings connected in parallel and with the secondary winding shorted.
1500 Vrms primary to secondary isolation and 750 Vrms winding to core isolation, tested for one minute.

Termination:

RoHS compliant tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost.

Packaging:

D = 13″ machine-ready reel. EIA-481 embossed plastic tape (DA2032-AL & DA2033-AL: 200 parts per full reel; DA2034-AL: 175 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: –40°C to +125°C
Tape and reel packaging: –40°C to +80°C

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Schematics

Physical characteristics

DA2032-AL

DA2033-AL

DA2034-AL

Tape and Reel specification

Parts per reel		Reel dimensions (mm)					Tape dimensions (mm)
13" (330 mm)		A	B	C	D	E	W	P	Po	P1	H	T
DA2032-AL	200	330	100	13	50,4	44,4	44	28	4	2	9,6	0,4
DA2033-AL	200	330	100	13	50,4	44,4	44	24	4	2	10,56	0,4
DA2034-AL	175	330	100	13	50,4	44,4	44	32	4	2	11,9	0,4

General specification

Core Material:

Ferrite

Weight:

DA2032: 5.9 g; DA2033: 8.2 g; DA2034: 14.1g

Packaging:

DA2032-AL 200 per 13″ reel. Plastic tape: 44 mm wide, 0.4 mm thick, 28 mm pocket spacing, 9.6 mm pocket depth
DA2033-AL 200 per 13″ reel. Plastic tape: 44 mm wide, 0.4 mm thick, 24 mm pocket spacing, 10.56 mm pocket depth
DA2034-AL 175 per 13″ reel. Plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.9 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity)

Resistance to soldering heat:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

Refer to Soldering Coilcraft Components before soldering.

PCB Washing:

Tested with pure water or alcohol only. More info.

Flyback Transformers

for Linear Technology LT3750 / LT3751

Typical Application