835-00959F datasheet, PDF - EEWORLD Datasheet

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835-00959F: DescriptionSMPS Transformer, ROHS COMPLIANT; CategoryPower management transformer; File Size99KB，2 Pages; ManufacturerElec & Eltek; Websitehttp://www.eleceltek.com; Environmental Compliance

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835-00959F Overview

SMPS Transformer, ROHS COMPLIANT

835-00959F Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
package instruction	ROHS COMPLIANT
Reach Compliance Code	unknown
ECCN code	EAR99
Other features	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.19
high	11.43 mm
Maximum input voltage	72 V
Minimum input voltage	36 V
length	21.84 mm
Manufacturer's serial number	835-00959
Installation features	SURFACE MOUNT
Number of primary windings	2
Number of secondary windings	3
Maximum operating frequency	1000 kHz
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Output voltage 1	3.3 V
method of packing	TAPE & REEL
physical size	L21.84XB29.21XH11.43 (mm)
Primary inductance	110 µH
surface mount	YES
Transformer type	SMPS TRANSFORMER
width	29.21 mm
Base Number Matches	1

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E & E Magnetic Products Limited

POWER TRANSFORMER

Flyback Transformer for PoE

For National Semiconductor LM5070 PoE Interface

CHEMATICS

Designed to operate at frequencies up to 1MHz with input

voltage of 36 - 72V

Low Leakage Inductance

Hipot voltage between the primary and bias windings to

the secondary windings: 1500Vrms

Operating temperature -40°C to +125°C.

RoHS compliant version is available

Custom design is also available

LECTRICAL

PECIFICATION @

25°C

Part

Number

Turns Ratio

Pri : Sec

1 : 0.19

Pri : Bias

1 : 0.69

at 0A

(

±10

110

at Ipk

(uH Min)

99.0

Leakage

Cap

Inductance -acitance

(nH Max) (PF Max)

1.40

DCR

(Ohm Max)

Pri

0.139

Ipk

(A)

Bias

0.656

1.5

Output

Sec

0.016

835-00959F

3.3V, 4.5A

Notes:

1. Inductance is measured at 10kHz, 0.1Vrms.

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

3. DCR for the secondary is per winding.

4. Leakage Inductance for the primary winding is with all other pins shorted.

5. Turns ratio is with the secondary windings connected in parallel.

6. Capacitance is measured between pin 3 and 4 with other pins shorted.

7. Hipot is measured from pin 4 to pin 1 and from pin 4 to pins 7, 8, and 9.

8. Operating temperature range: -40°C 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.

1/F.,Harbour View,No.12 Science Park East Avenue,Phase II,Hong Kong Science Park,Shatin,N.T.,HK . Tel: (852) 2954 3333 . Fax: (852) 2954 3304

PX002(01)

Revised in 12/03

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