Datasheet 3D Models

C1173 Flyback Transformer

for Texas Instruments TSP23750

Developed for TI TPS23750 PoE PD controller (PMP929 reference design)
Isolated, synchronous flyback transformers for IEEE 802.3af PoE applications

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Count	Unit price
1	$3.93
200	$3.37
600	$2.94
1200	$2.27
2400	$1.97
5000	$1.81

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

Packaging

D = 13" machine-ready reel

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Typical Application

Works with Texas Instruments TPS23750

Part number	Input Voltage	Output 1			Power	Fsw
Part number	Input Voltage	Sec	Drive	Bias	Power	Fsw
C1173-AL_	18 V — 72 V	3.3 V , 3 A	5.6 V , 0.01 A	10 V , 0.02 A	9.9 W	500 kHz
C1174-AL_	18 V — 72 V	5 V , 2 A	7.5 V , 0.01 A	10 V , 0.02 A	10 W	500 kHz
GA3562-BL_	18 V — 72 V	12 V , 0.83 A	6 V , 0.01 A	10 V , 0.02 A	10 W	500 kHz

Specifications

Electrical specifications at 25°C.

Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±10%)	Inductance min at 1.2 A (µH)	DCR max (Ω) 4				Leakage Inductance max (µH) 5		Turns Ratio 6	Isolation Voltage (Vrms) 7
Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±10%)	Inductance min at 1.2 A (µH)	Pri	Sec	Drive	Bias	Pri	Drive	Pri : Sec : Drive : Bias	Isolation Voltage (Vrms) 7
C1173-AL_	166.5	150.0	0.770	0.020	0.523	1.120	2.50	0.40	1 : 0.154 : 0.27 : 0.5	1500
C1174-AL_	150.0	135.0	0.515	0.023	0.570	0.880	2.00	0.40	1 : 0.2 : 0.313 : 0.44	1500
GA3562-BL_	166.5	150.0	0.740	0.100	0.456	1.150	2.05	0.25	1 : 0.5 : 0.25 : 0.5	1500

Notes

Output of the secondary is with the windings connected in parallel. Bias winding output is 10 V, 20 mA.
When ordering, please specify packaging code: e.g. C1174-ALD
Inductance is for the primary, measured at 100 kHz, 0.1 Vrms.
DCR for secondary is with windings connected in parallel.
Leakage inductance for the primary is with the secondary and drive windings shorted; leakage inductance for the drive winding is with the secondary windings shorted.
Turns ratio is with both secondary windings connected in parallel.
1500 Vrms, one minute isolation from the primary and bias windings to the secondary.

Termination:

RoHS-compliant 260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations. Other terminations available at additional cost.

Packaging:

D = 13" machine-ready reel. EIA 481 embossed plastic tape (200 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

Secondary windings to be connected
in parallel on PC board.

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm)					Tape dimensions (mm)						Orientation
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
200	330	100	13	50,4	44,4	44	28	4	2	9,6	0,35

General specification

Core Material:

Ferrite

Weight:

5.0 – 5.3 g

Packaging:

200 per 13″ reel Plastic tape: 44 mm wide, 0.35 mm thick, 28 mm pocket spacing, 9.6 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.

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C1173 Flyback Transformer

for Texas Instruments TSP23750

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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Warning