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Cx Family Common Mode Chokes
0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

CX9642 PoE

Flyback Transformer

RoHS compliant
  • Developed for Silicon Labs Si3406, Si34061, and Si34062 30 W PD Flyback POE
  • Designed  to meet 30 W PoE IEEE 802.3at-2009 standard
  • Optimized for 220 kHz with 36 – 57 input voltage, also operates from 100 kHz to 500 kHz
Buy Now:
Count Unit price
1 $9.56
175 $7.65
700 $4.59
1400 $3.57
2800 $3.06
5000 $2.81

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

. in stock, ready to ship today.
Request a Sample:

Typical Application

Works with Silicon Labs Si3406x

Input Voltage Output 1 Power Fsw
36 V 57 V 5 V , 6 A 30 W 220 kHz

Specifications

Electrical specifications at 25°C.

Part number 2 Inductance
at 0A (µH) 3
(Tolerance: ±15%)
Inductance
min at   3 A (µH)
DCR max (Ω) 4 Leakage
Inductance
max (µH) 5
Turns Ratio 6 Isolation
Voltage (Vrms) 7
Pri Sec Aux Pri : Sec : Aux
CX9642-AL_ 70.0 60.0 0.080 0.0027 0.36 1.0 1 : 0.136 : 0.409 1500
Notes
  1. Output is with the secondary windings connected in parallel. Output of the auxiliary winding is 12 V
  2. When ordering, please specify packaging code: e.g. CX9642-ALD
  3. Inductance is for the primary, measured at 250 kHz, 0.7 Vrms, 0 Adc.
  4. DCR is with the windings connected in parallel.
  5. Leakage inductance is for the primary winding with the secondary windings shorted.
  6. Turns ratio is with the primary and the secondary windings connected in parallel.
  7. Isolation: 1500 Vrms one minute primary and auxiliary to secondary; 500 Vrms primary to auxiliary.

Termination:

  • RoHS-compliant. 260°C compatible. Tin-silver-copper over tin over nickel over phos bronze. Other terminations available at additional cost.

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. 
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

cx9642schematic.gif

Connect pin 1 to 2 and pin 3 to 4 on the PC Board.
Connect pin 10, 11 and 12 together and pins 7, 8 and 9 together on the PC Board.

Physical characteristics

cx9642dimensions.gif

dims_inches_mm.gif

Tape and Reel specification

tapereel_pl.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 cx9642orientation.gif
175 330 100 13 50,4 44,4 44 32 4 2 11,9 0,4

General specification

Core Material:
Ferrite
Weight:
11.9 g
Packaging:
175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.9 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.