Datasheet 3D Model

CX9721-AL Flyback Transformer

for TI TPS61046

Developed for the Texas Instruments Isolated Flyback DC-DC converter reference design (PMP9801) based on the TPS61046 boost converter.
Output of the auxiliary winding is 5 V, 2 mA, used to power the IC

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Typical Application

Works with Texas Instruments TPS61046

Input Voltage	Output		Power	Fsw
Input Voltage	Sec	Bias	Power	Fsw
5 V — 20 V	5 V , 0.25 A	5 V , 0.002 A	0.25 W	100 kHz

Specifications

Electrical specifications at 25°C.

Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 1 A (µH)	DCR max			Leakage Inductance max (µH) 3	Turns Ratio	Isolation Voltage (Vrms) 4
Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 1 A (µH)	Pri (Ω)	Sec (mΩ)	Bias (mΩ)	Leakage Inductance max (µH) 3	Pri : Sec : Bias	Isolation Voltage (Vrms) 4
CX9721-ALD	10	8.0	0.08	80.00	80.00	0.16	1 : 1 : 1	4000

Notes

When ordering, please specify packaging code: e.g.CX9721-ALD
Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc.
Leakage inductance measured at 100 kHz, 0.1 Vrms, between pins 1 and 2 with all other pins shorted.
4000 Vrms, one minute isolation from the primary and auxiliary winding to the secondary.

Termination:

RoHS-compliant. 260°C compatible. RoHS tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations.

Packaging:

D = 13″ machine-ready reel. EIA-481 embossed plastic tape (700 parts per full reel).
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 +160°C.
Tape and reel packaging: –40°C to +80°C

Maximum part temperature:

+160°C (ambient + temp rise).

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
700	330	100	13	38,4	32,4	32	16	4	2	5,72	0,40

General specification

Core Material:

Ferrite

Weight:

1.08 g

Packaging:

700 per 13″ reel Plastic tape: 32 mm wide, 0.40 mm thick, 16 mm pocket spacing, 5.72 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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CX9721-AL Flyback Transformer

for TI TPS61046

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Warning