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C1154 Flyback Transformer

for PoE

RoHS compliant
  • Developed for Maxim MAX5941A PoE Interface/PWM Controller
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Typical Application

Works with Maxim MAX5941A

Input Voltage Output Power Fsw
Sec1 Sec2
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 Inductance
at 0A (µH) 1
(Tolerance: ±10%)
Inductance
min at   0.25 A (µH)
DCR max (Ω) Leakage
Inductance
max (µH) 2
Turns Ratio Isolation
Voltage (Vrms) 3
Pri Sec1 Sec2 Drive Aux Pri : Sec1 : Sec2 : Drive : Aux
C1154-BL_ 255.0 229.5 0.335 0.020 0.017 0.200 0.745 5.0 1 : 0.1 : 0.075 : 0.125 : 0.425 1500
Notes
  1. Inductance is for the primary, measured at 275 kHz, 1.0 Vrms.
  2. Leakage inductance is for the primary winding with the secondary windings shorted.
  3. 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).
  • 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.
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):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Schematics

c1154s.gif

Physical characteristics

c1154d.gif


dims_inches_mm-(4).gif

Tape and Reel specification

tapereel_pl-(37).gif
 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T part_or_c-(1).gif
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.

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