3D Model Datasheet

CX9642 PoE

Flyback Transformer

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

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Count	Unit price
1	$10.14
175	$8.69
700	$5.22
1400	$4.05
2800	$3.48
5000	$3.20

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

Packaging

D = 13" machine-ready reel

. in stock, ready to ship today.

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Typical Application

Works with Skyworks Si3406x

Input Voltage	Output 1		Power	Fsw
Input Voltage	Sec	Aux	Power	Fsw
36 V — 57 V	5 V , 6 A	12 V	30 W	220 kHz

Specifications

Electrical specifications at 25°C.

Part number 2 (Hover for schematics)	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
Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±15%)	Inductance min at 3 A (µH)	Pri	Sec	Aux	Leakage Inductance max (µH) 5	Pri : Sec : Aux	Isolation Voltage (Vrms) 7
CX9642-AL_	70.0	60.0	0.080	0.0027	0.36	1.0	1 : 0.136 : 0.409	1500

Notes

Output is with the secondary windings connected in parallel. Output of the auxiliary winding is 12 V
When ordering, please specify packaging code: e.g. CX9642-ALD
Inductance is for the primary, measured at 250 kHz, 0.7 Vrms, 0 Adc.
DCR is with the windings connected in parallel.
Leakage inductance is for the primary winding with the secondary windings shorted.
Turns ratio is with the primary and the secondary windings connected in parallel.
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). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).

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

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

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
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.

Warehouses

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CX9642 PoE

Flyback Transformer

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Warning