DA2257-AL COILCRAFT [Coilcraft lnc.], DA2257-AL Datasheet

DA2257-AL

Manufacturer Part Number

DA2257-AL

Description

Flyback Transformer

Manufacturer

COILCRAFT [Coilcraft lnc.]

Datasheet

1.DA2257-AL.pdf (1 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

DA2257-ALD

Manufacturer:

COILCRAF

Quantity:

150

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Download datasheet (191Kb)

DA2257-AL_

1. When ordering, please specify packaging code:

0.530

13,46

Packaging: D = 13 machine-ready reel. EIA-481 embossed plastic

number

0.500

12,70

0.039

1,00

Part

max

Flyback Transformer

B = Less than full reel. In tape, but not machine ready. To

0.699

17,75

±10% (µH)

tape (175 parts per full reel).

have a leader and trailer added ($25 charge), use

code letter D instead.

L at 0 A

0.512

13,00

Dot above pin1

35.0

max

DA2257-ALD

min (µH)

L at Ipk

0.028

0.098

0,70

2,50

30.0

0.004 /0,10

0.061

1,55

Specifications subject to change without notice.

Please check our website for latest information.

0.225 (aux)

0.138 (gate)

0.010 (sec 1)

0.018 (sec 2)

0.062 (pri)

DCR max

(Ohms)

Recommended

Land Pattern

0.590

14,99

Leakage L

max (µH)

• Dual-output flyback transformer for Power over Ethernet

• Operates in continuous mode at 250 kHz with 14 –60 V input

• 2000 Vrms isolation from primary and auxiliary to secondaries

Core material Ferrite

Terminations RoHS compliant tin-silver over tin over nickel over

phos bronze. Other terminations available at additional cost.

Weight 6.35g

Ambient temperature –40°C to +85°C

Storage temperature Component: –40°C to +85°C.

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 175 per 13 reel. Plastic tape: 32 mm wide, 0.5 mm thick,

28 mm pocket spacing, 12.93 mm pocket depth

PCB washing Only pure water or alcohol recommended

2. Inductance is for the primary, measured at 250 kHz, 0.2 Vrms, 0 Adc.

3. Ipk is peak primary current drawn at minimum input voltage.

4. Leakage inductance is for the primary winding with all other pins

5. Electrical specifications at 25°C.

0.95

shorted.

0.050

0.098

1,27

2,50

3.6 : 1 (pri : gate)

3.6 : 1 (pri : sec 2)

2 : 1 (pri : aux)

6 : 1 (pri : sec1)

For National Semiconductor

LM5071 & LM5072 PD Controllers

Turns

ratios

Pri

Aux

Document 509 Revised 10/29/08

2.7

Ipk

(A)

5.5 V, 0.05 A (gate)

3.3 V, 2.0 A (sec 1)

5.0 V, 1.0 A (sec 2)

10 V, 0.05 A (aux)

Document 509

Outputs

Gate

Sec 1

Sec 2

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