835-00827 datasheet, PDF - EEWORLD Datasheet

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835-00827: DescriptionSMPS Transformer, 6W; CategoryPower management transformer; File Size61KB，2 Pages; ManufacturerElec & Eltek; Websitehttp://www.eleceltek.com

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835-00827 Overview

SMPS Transformer, 6W

835-00827 Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Reach Compliance Code	unknown
ECCN code	EAR99
Other features	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.143
high	7.4 mm
Maximum input voltage	72 V
Minimum input voltage	36 V
length	16.5 mm
Manufacturer's serial number	835-00827
Installation features	SURFACE MOUNT
Number of primary windings	3
Number of secondary windings	2
Maximum operating frequency	250 kHz
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Output voltage 1	3.3 V
method of packing	TAPE & REEL
physical size	L16.5XB16.8XH7.4 (mm)
rated power	6 W
Primary inductance	85 µH
surface mount	YES
Transformer type	SMPS TRANSFORMER
width	16.8 mm
Base Number Matches	1

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E & E Magnetic Products Limited

POWER TRANSFORMER

Flyback Transformer for PoE

Providing Power to PoE devices with up to 6 Watts

CHEMATICS

Flyback transformers designed for PoE (IEEE802.3af)

powered devices with up to 6 Watts

Designed for 250kHz switching frequency with input of

36 - 72V

Low Leakage Inductance

Hipot voltage: 1500Vrms

Operating temperature -40°C to +85°C.

RoHS compliant version is available

Custom design is also available

LECTRICAL

PECIFICATION @

25°C

Part

Number

RoHS

Part

Number

Turns Ratio

Pri : Sec

Pri : Bias

Inductance

at 0A

(uH ± 10%)

Inductance Leakage

at Ipk

Inductance

(uH Min)

(nH Max)

DCR

(mOhm Max)

Pri

Sec

Bias

Ipk

(A)

Secondary

Output

Continuous mode

835-00820

835-00821

835-00822

835-00823

835-00824

835-00820F

835-00821F

835-00822F

835-00823F

835-00824F

1 : 0.063

1 : 0.083

1 : 0.100

1 : 0.143

1 : 0.333

1 : 0.344

1 : 0.333

1 : 0.343

1 : 0.333

167

177

184

193

204

150.3

159.3

165.6

173.7

183.6

7.8

7.0

4.0

8.0

5.8

303

353

286

344

293

570

660

515

660

545

0.62

0.60

0.57

0.55

0.52

Vout=1.8V,3.3A

Vout=2.5V,2.4A

Vout=3.3V,1.8A

Vout=5.0V,1.2A

Vout=12V,0.5A

Discontinuous mode

835-00825

835-00826

835-00827

835-00828

835-00829

835-00825F

835-00826F

835-00827F

835-00828F

835-00829F

1 : 0.063

1 : 0.083

1 : 0.100

1 : 0.143

1 : 0.333

1 : 0.344

1 : 0.333

1 : 0.357

1 : 0.333

67.5

72.0

76.5

81.0

85.5

6.7

5.0

4.0

3.1

2.4

311

219

285

271

265

575

388

530

529

484

1.0

0.95

0.90

0.85

0.80

Vout=1.8V,3.3A

Vout=2.5V,2.4A

Vout=3.3V,1.8A

Vout=5.0V,1.2A

Vout=12V,0.5A

Notes:

1. Inductance is measured at 250kHz, 0.5Vrms, 0Adc.

2. Peak primary current, Ipk, is drawn at minimum input voltage.

3. DCR for the primary and for the secondary are with the windings connected in parallel.

4. Leakage Inductance is for the primary winding with the secondary winding shorted.

5. Turns ratio are with the primary and secondary windings connected in parallel.

6. Output of the secondary is with the windings connected in parallel. Bias winding output is 12V, 0.2A.

7. Designed to remain in continuous mode operation at power levels of 3 watts and above.

8.Operating temperature range: -40°

to +125°C. The part temperature (ambient temperature + temperature rise)

should not exceed the upper limit of the operating temperature under worst case operating conditions. Circuit design,

component placement, PWB trace size and thickness, airflow and other cooling provisions all affect the part

temperature. Part temperature should be verified in the end application.

2/F Block A, 94 Tokwawan Road, Kowloon, Hong Kong

Tel: (852) 2765 3888

Fax: (852) 2954 3304

PX205(01)

Revised in 06/12

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