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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.

Flyback Transformer

Document 483

Document 483 Revised 12/21/11

Inductance

Inductance

Leakage

Part

DCR max

Turns ratio

±10% (µH)

min (µH)

(Ohms)

max (µH)

pri : bias

(A)

C1453-AL_

50

40

0.185 (pins 3 – 1)

1.10

1 : 0.166

1 : 0.5

1.22

3.3 V, 1.5A

0.030 (pins 6 – 10)

0.030 (pins 7 – 9)

0.385 (pins 4 – 5)

1. When ordering, please specify

packaging code:

C1453-ALD

Packaging: D = 13

″ machine ready reel. EIA-481 embossed plastic

tape (500 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 250 kHz, 0.3 Vrms.

3. Peak primary current drawn at minimum input voltage.

4. Leakage inductance is for the primary winding with the secondary wind-

ings shorted.

5. Turns ratio is with the secondary windings connected in parallel.

6. Output of the secondary is with the windings connected in parallel. Bias

winding output is 10 V.

7. Electrical specifications at 25°C.

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

For Texas Instruments TPS23750

PoE Powered Device Controller

10

10

6

5

1

1

1

5

Recommended

Land Pattern

0.453

11,50

0.512

13,00

0.256

6,50

0.394

10,00

0.063

1,60

0.079

2,00

0.055

1,40

0.028

0,70

0.079

2,00

max

Dot indicates pin 1

max

max

0.004/ 0,10

10

6

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 1.4 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)

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

38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Packaging 500 per 13

″ reel Plastic tape: 24 mm wide,

0.36 mm thick, 16 mm pocket spacing, 6.13 mm pocket depth

PCB washing Tested with pure water or alcohol only. For other solvents,

see Doc787_PCB_Washing.pdf

• Isolated non-synchronous flyback transformers developed for

Texas Instruments PMP717 reference design.

• Designed for discontinuous conduction mode, 34 – 57 V input

• 1500 Vrms isolation primary to secondary windings

10

3

Pri

Bias

Sec

4

1

5

6

7

9

Secondary windings to be

connected in parallel on the

PC board.

Dimensions are in

inches

mm