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© Coilcraft Inc. 2013

This product may not be used in medical or high

risk applications without prior Coilcraft approval.

Specification subject to change without notice.

Please check web site for latest information.

Document 824

Document 824 Revised 12/16/11

1. When ordering, please specify a

packaging code:

JA4667-ALD

Packaging: D = 13

″ machine ready reel. EIA-481 embossed plastic

tape (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 measured at 250 kHz, 0.2 Vrms, 0 Adc.

Leakage

Input

Part

min (µH)

pri

sec

bias

max (µH)

range (V)

pri : sec

pri : bias

JA4249-CL_

90

0.0180

0.015

0.320

0.120

10 – 57

1 : 0.80

1 : 1.9

5 V, 5 A

JA4667-AL_

90

0.0175

0.047

0.320

0.085

10 – 57

1 : 1.9

1 : 1.9

12 V, 2 A

Core material Ferrite

Terminations RoHS tin-silver (96.5/3.5) over tin over nickel over phos

bronze. Other terminations available at additional cost.

Weight 12.1 – 13.1 g

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)

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

26,315,789 hours / 38 per billion hours, Calculated per Telcordia SR-322

Packaging 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.

Dimensions are in

inches

mm

• Developed for the TI TPS23756 High Power/High Efficiency

PoE Interface and DC/DC Controller.

• Designed for forward topology operating at 250 kHz with an

extended input voltage range of 10 – 57 V.

• 1500 Vrms, one minute isolation, primary and bias to secondary

3. DCR for the secondary is measured with the windings connected in

parallel.

4. Leakage inductance is for the primary and is measured with the

secondary shorted.

5. Maximum duty cycle at minimum input voltage is 0.72.

6. Turns ratio is with the primary windings and secondary windings

connected in parallel.

7. Output is with the secondary windings connected in parallel. Bias

winding output is 12 V, 20 mA.

8. Electrical specifications at 25°C.

Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

Primary windings and secondary windings

to be connected in parallel on PC board.

TPS23756 PoE Interface

0.430

10,92

1.181

30,00

0.969

24,6

max

0.004 / 0,10

max

Recommended

Land Pattern

0.810

20,57

0.827

21,0

0.118

3,00

0.118

3,00

0.050

1,27

0.028

0,70

max

12

1

1

6

7

0.930

23,62

0.130

3,3

Dot indicates pin 1

12

Parts manufactured prior

to December 2011 may

be marked differently.

1

4

2

5

6

3

Primary

Bias

Secondary

7

11

12

8