Datasheet 3D Models

Transformers

for ADI ADuM4070 Isolated Switching Regulator

Developed to work with Analog Devices ADuM4070 Isolated switching regulator with integrated feedback
Power rating: 2 Watts

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Part number

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Count	Unit price
1	$5.08
175	$4.30
350	$3.75
700	$3.26
1400	$2.61
2800	$2.22
5000	$2.04

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

Packaging

D = 13" machine-ready reel

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Part number

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Typical Application

Works with Analog Devices ADuM4070

Part number	Primary voltage	Secondary voltage
CR7983-CL_	5 V	3.3 V — 15 V
CR7984-CL_	5 V	12 V — 24 V
CR7985-CL_	5 V	5 V — 15 V

Specifications

Electrical specifications at 25°C.

Part number 1 (Hover for schematics)	Inductance min (µH) 2	DCR max (Ω) 3		Leakage Inductance max (µH) 4	Turns Ratio	Volt-time product (V-µs) 5	Isolation Voltage (Vrms) 6
Part number 1 (Hover for schematics)	Inductance min (µH) 2	Pri	Sec	Leakage Inductance max (µH) 4	Pri : Sec	Volt-time product (V-µs) 5	Isolation Voltage (Vrms) 6
CR7983-CL_	256	0.16	0.32	0.75	1 : 2	18	5000
CR7984-CL_	256	0.17	0.45	0.75	1 : 3	18	5000
CR7985-CL_	256	0.17	2.00	0.72	1 : 5	18	5000

Notes

When ordering, please specify packaging code: e.g. CR7983-CLD
Inductance is for the primary, measured from pins 12 – 11 at 1 kHz, 0.1 V.
DCR is for each winding of the primary and secondary.
Leakage inductance is for the primary windings, measured from pins 12 – 11 with all secondary windings shorted.
Based on VIN max, FSW min and number of primary turns.
Isolation: 5000 Vrms, one second primary to secondary.

Termination:

Tin-silver-copper over tin over nickel over phos bronze.

Packaging:

D = 13″ machine ready reel. EIA-481 embossed plastic tape (175 per full reel). 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 +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

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:

10.1 g

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.

Transformers

for ADI ADuM4070 Isolated Switching Regulator

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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Transformers

for ADI ADuM4070 Isolated Switching Regulator

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Related product series

Isolation Transformers

TX2 Push-Pull Transformers

ZA9801-AE Series

Isolation Transformer

Transformers

Isolation Transformer

Miniature Surface Mount Transformers

Isolation Transformers

TX1 Push-Pull Transformers

Isolation Transformer

Isolation Transformer

ZD2155-AE Isolated Buck Transformer

Isolation Transformer

ZA9668-AE and ZB1175-AE Isolated Buck Transformers

PA6598-AL Isolation Transformer

WA8417-AL Fly-Buck Transformer

WA8582-AL

HTX7045 Isolation Transformers

Warning