Datasheet 3D Model

TA7788 Flyback Transformer

Developed for use with Silicon Labs Si828x isolated dc-dc-converter reference designs.
5000 Vrms, one minute isolation (hipot), from primary to secondary
Designed to meet reinforced insulation class with 8 mm creepage and clearance.
Ultra-miniature flyback tranformer, measures only 10 × 17 × 6 mm
AEC-Q200 Grade 1 (−40°C to +125°C)

Buy Now:

Count	Unit price
1	$5.31
700	$2.58
1400	$2.15
2500	$1.95
5000	$1.77

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 Si828x

Input Voltage	Output		Power	Fsw
Input Voltage	Sec1	Sec2	Power	Fsw
7 V — 24 V	15 V , 0.13 A	9 V , 0.13 A	2 W	250 kHz

Specifications

Electrical specifications at 25°C.

Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±5%)	Isat (A) 3	DCR max 4			Leakage Inductance max (µH) 5	Turns Ratio	Isolation Voltage (Vrms) 6
Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±5%)	Isat (A) 3	Pri (Ω)	Sec1 (mΩ)	Sec2 (mΩ)	Leakage Inductance max (µH) 5	Pri : Sec1 : Sec2	Isolation Voltage (Vrms) 6
TA7788-ALD	25.0	1.4	0.265	437.000	235.000	0.6	1 : 1.25 : 0.75	5000

Notes

When ordering, please specify packaging code: e.g.TA7788-ALD
Inductance is for the primary, measured on an Agilent/HP 4284 at 250 kHz, 0.1 Vrms, 0 Adc.
DC current that causes an inductance drop of 30% (typ) from its value without current
DCR is measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
Leakage inductance measured between pins 2 and 3 at 250 kHz, 0.1Vrms, 0 Adc with all secondary pins shorted.
5000 Vrms, one minute isolation (hipot), from primary to secondary.

Termination:

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

Packaging:

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

Maximum part temperature:

+160°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
700	330	100	13	38,4	32,4	32	16	4	2	5,72	0,40

General specification

Core Material:

Ferrite

Weight:

1.1 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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TA7788 Flyback Transformer

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Warning