31289R datasheet, PDF - EEWORLD Datasheet

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31289R: DescriptionSMPS Transformer, 8W; CategoryPower management transformer; File Size146KB，1 Pages; ManufacturerWurth Elektronik

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31289R Overview

SMPS Transformer, 8W

31289R Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Reach Compliance Code	compliant
ECCN code	EAR99
Other features	FLY BACK, LENGTH DIMENSION INCLUDES TERMINALS ALSO, PUSH-PULL, TURNS RATIO: 1:1:1:1:1
Certification	UL
high	8.89 mm
length	22.23 mm
Manufacturer's serial number	31289R
Installation features	SURFACE MOUNT
Number of primary windings	3
Number of secondary windings	2
Maximum operating frequency	500 kHz
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
method of packing	TAPE & REEL
physical size	L22.23XB15.75XH8.89 (mm)
rated power	8 W
Primary inductance	210 µH
surface mount	YES
Transformer type	SMPS TRANSFORMER
width	15.75 mm
Base Number Matches	1

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TransformingMagnetics

SwitchmodePower

FLEXformer

15 Product Line

Features

• Economic, reliable SMD transformers and

inductors

• Combine windings in series or parallel to

meet your specific application

• Manufactured with UL94 V-O materials

• Pick and place compatible

• Compatible with solder reflow process to

240º C

• Power range: Typically 8 watts and below

• Frequency range up to 500kHz

Applications

• Ideal for use as inductors or transformers

in DC/DC converters for the following

topologies and applications:

- Buck/Boost

- Chokes

- Filters

- Coupled inductors

- Flyback

- Push-Pull

- SEPIC

- Cuk

- Forward converters

- Half/Full bridge

Environmental Specifications

• Operating temperature range:

-40°C to +85°C

• Storage temperature range:

-50°C to +155°C

Packaging

DCR Max

per wind

ohms

0.210

P/N

31285R

31286R

31287R

31288R

31289R

Base

25 +/- 10%

40 +/- 15%

64 +/- 15%

100 +/- 25%

210 min

Isat

Base1

Irms

Base2

2000

1500

1000

500

400

• Surface mount parts packaged in 24/32

mm embossed carrier tape per EIA-481-3

• 200 pieces per 13" reel

1 Amount of DC current that will result in approximately a 15% decrease in inductance.

2 RMS current rating for each single wind based on 250 circular mils per amp.

3 Maximum breakdown voltage between any 2 windings is 500VDC. Safety critical or high

voltage designs are available upon request as a customized product.

4 Turns ratio 1:1:1:1:1 +/- 1%.

05/08/03

Details subject to change. Contact your Midcom sales representative for additional information. Dimensions: in/mm. All tolerances are ± .010/0,25 and electrical specifications are @ 25°C unless otherwise specified.

Midcom, Inc. USA

121 Airport Drive - PO Box 1330

Watertown, SD 57201

T: 605.886.4385 ~ F: 605.886.4486

www.midcom-inc.com ~ email:sales@midcom-inc.com

Midcom, Inc. China

10/F Spectrum Tower 53 Hung to Road

Kwun Tong, Kowloon, HK

T: 852.2320.4221 ~ F: 852.2352.3272

www.midcom.com.cn ~ email:sye@midcom-inc.com

31289R Related Products

	31289R	31288R	31287R	31286R
Description	SMPS Transformer, 8W	SMPS Transformer, 8W	SMPS Transformer, 8W	SMPS Transformer, 8W
Is it lead-free?	Contains lead	Contains lead	Contains lead	Contains lead
Is it Rohs certified?	incompatible	incompatible	incompatible	incompatible
Reach Compliance Code	compliant	compliant	compliant	compliant
ECCN code	EAR99	EAR99	EAR99	EAR99
Other features	FLY BACK, LENGTH DIMENSION INCLUDES TERMINALS ALSO, PUSH-PULL, TURNS RATIO: 1:1:1:1:1	FLY BACK, LENGTH DIMENSION INCLUDES TERMINALS ALSO, PUSH-PULL, TURNS RATIO: 1:1:1:1:1	FLY BACK, LENGTH DIMENSION INCLUDES TERMINALS ALSO, PUSH-PULL, TURNS RATIO: 1:1:1:1:1	FLY BACK, LENGTH DIMENSION INCLUDES TERMINALS ALSO, PUSH-PULL, TURNS RATIO: 1:1:1:1:1
Certification	UL	UL	UL	UL
high	8.89 mm	8.89 mm	8.89 mm	8.89 mm
length	22.23 mm	22.23 mm	22.23 mm	22.23 mm
Manufacturer's serial number	31289R	31288R	31287R	31286R
Installation features	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT
Number of primary windings	3	3	3	3
Number of secondary windings	2	2	2	2
Maximum operating frequency	500 kHz	500 kHz	500 kHz	500 kHz
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C
method of packing	TAPE & REEL	TAPE & REEL	TAPE & REEL	TAPE & REEL
physical size	L22.23XB15.75XH8.89 (mm)	L22.23XB15.75XH8.89 (mm)	L22.23XB15.75XH8.89 (mm)	22.23mm X 15.75mm X 8.89mm
rated power	8 W	8 W	8 W	8 W
Primary inductance	210 µH	100 µH	64 µH	40 µH
surface mount	YES	YES	YES	YES
Transformer type	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER
width	15.75 mm	15.75 mm	15.75 mm	15.75 mm
Base Number Matches	1	1	1	1

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