Datasheet 3D Model

C1154 Flyback Transformer

for PoE

Developed for Maxim MAX5941A PoE Interface/PWM Controller

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Typical Application

Works with Maxim MAX5941A

Input Voltage	Output		Power	Fsw
Input Voltage	Sec1	Sec2	Power	Fsw
18 V — 72 V	3.3 V , 0.2 A	2.5 V , 0.6 A	2.2 W	275 kHz

Specifications

Electrical specifications at 25°C.

Part number (Hover for schematics)	Inductance at 0A (µH) 1 (Tolerance: ±10%)	Inductance min at 0.25 A (µH)	DCR max					Leakage Inductance max (µH) 2	Turns Ratio	Isolation Voltage (Vrms) 3
Part number (Hover for schematics)	Inductance at 0A (µH) 1 (Tolerance: ±10%)	Inductance min at 0.25 A (µH)	Pri (Ω)	Sec1 (mΩ)	Sec2 (mΩ)	Drive (mΩ)	Aux (mΩ)	Leakage Inductance max (µH) 2	Pri : Sec1 : Sec2 : Drive : Aux	Isolation Voltage (Vrms) 3
C1154-BLD	255.0	229.5	0.335	20.000	17.000	200.000	745.000	5.0	1 : 0.1 : 0.075 : 0.125 : 0.425	1500

Notes

Inductance is for the primary, measured at 275 kHz, 1.0 Vrms.
Leakage inductance is for the primary winding with the secondary windings shorted.
1500 Vrms, one minute primary/bias to secondary/drive isolation.

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

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:

4.9 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 to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

Warehouses

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C1154 Flyback Transformer

for PoE

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