US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Flyback Transformers
Document 510-1
Document 510-1 Revised 02/09/11
1. When ordering, please specify packaging code:
DA2034-ALD
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).
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter D instead.
2. Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc.
3. Peak primary current drawn at minimum input voltage.
4. DCR is with the primary windings connected in parallel.
5. Leakage inductance is with the primary windings connected in parallel
and with the secondary winding shorted.
6. Capacitance measured at 100 kHz, 0.1 Vrms from pin 3 to pin 1 with all
other pins shorted.
7. Electrical specifications at 25°C.
Inductance Inductance Leakage Interwinding
Part at 0 A2
at Ipk3 DCR max (Ohms) inductance5 Ipk3 capacitance6 Turns ratio
number1 ±10% (µH) min (µH) pri4 sec max (µH) (A) (pF) pri : sec
DA2032-AL_ 10.0 9.0 0.013 1.60 0.150 3.0 67 1
:
10
DA2033-AL_ 10.0 9.0 0.015 1.10 0.144 5.0 76 1
:
10
DA2034-AL_ 10.0 9.0 0.018 1.75 0.250 10.0 128 1
:
10
These surface mount flyback transformers were devel-
oped for use with Linear Technology LT3750 Capacitor
Charger Controller. DA2033-AL and DA2034-AL are
also specified for the LT3751 Controller. They have a
smaller footprint than other transformers designed for
this application.
These low-profile transformers feature 1500 Vrms, one
minute winding to winding isolation and 750 Vrms winding
to core isolation. They are designed to operate with an
input range of 3 – 24 V and to charge a capacitor to 300 V.
They are shown on the Linear Technology LT3750 ap-
plication 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).
Coilcraft can also custom engineer a transformer to meet
your specific requirements. For free evaluation samples,
contact Coilcraft or visit www.coilcraft.com.
For Linear Technology LT3750/LT3751
Capacitor Charger Controllers
Core material Ferrite
Terminations RoHS compliant tin-silver over tin over nickel over
phos bronze. Other terminations available at additional cost.
Weight DA2032: 5.9 g; DA2033: 8.2 g; DA2034: 14.1g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
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
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
1
12
Secondar
y
Primary
7
8
9
10
6
5
4
3
Primary windings to be connected
in parallel on PC board
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Flyback Transformers for Linear LT3750
Document 510-2
Document 510-2 Revised 02/09/11
0.135
3,43
0.070
1,79
0.098
2,50
1
0.350
8,89
0.079
2,01
0.865
21,97
0.590
14,98
0.677
17,20
0.693
17.60
0.665
16,88
0.028
0,72
0.098
2,5
max
Dot indicates pin 1
max
max
112
67
Recommended
Land Pattern
0.004 /0,10
DA2032-AL
XXXX Y
0.070
1,79
0.130
3,30
0.028
0,711
0.100
2,54
0.100
2,54
1
0.385
9,78
0.075
1,915
0.950
24,13
0.699
17,0
0.685
17,40
0.799
20,3
0.748
19,0
max
Dot indicates pin 1
max
max
112
67
Recommended
Land Pattern
0.004 /0,10
0.130
3,30
0.050
1,27
1
0.450
11,43
0.080
2,03
1.181
30,00
0.827
21,00
0.810
20,57
0.969
24,60
0.930
23,62
0.028
0,711
0.118
3,0
0.118
3,00
max
Dot indicates pin 1
max Internal code
max
112
67
Recommended
Land Pattern
0.004 /0,10
DA2033-AL
XXXX Y
DA2034-AL
XXXX Y
Partsmanufactured prior
to September 2011 maybe
markeddifferently.
DA2032-AL
DA2033-AL
DA2034-AL
Dimensions are in inches
mm
