835-00837F datasheet, PDF - EEWORLD Datasheet

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835-00837F: DescriptionSMPS Transformer, 13W, ROHS COMPLIANT; CategoryPower management transformer; File Size94KB，2 Pages; ManufacturerElec & Eltek; Websitehttp://www.eleceltek.com; Environmental Compliance

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835-00837F Overview

SMPS Transformer, 13W, ROHS COMPLIANT

835-00837F Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Elec & Eltek
package instruction	ROHS COMPLIANT
Reach Compliance Code	unknown
ECCN code	EAR99
Other features	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.11
high	8.38 mm
Maximum input voltage	72 V
Minimum input voltage	36 V
length	17.15 mm
Manufacturer's serial number	835-00837
Installation features	SURFACE MOUNT
Number of primary windings	3
Number of secondary windings	2
Maximum operating frequency	250 kHz
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Output voltage 1	3.3 V
method of packing	TAPE & REEL
physical size	L17.15XB21.97XH8.38 (mm)
rated power	13 W
Primary inductance	40 µH
surface mount	YES
Transformer type	SMPS TRANSFORMER
width	21.97 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 13 Watts

CHEMATICS

Flyback transformers designed for PoE (IEEE802.3af)

powered devices with up to 13 Watts

Designed for 250kHz switching frequency with input of

36 - 72V

Low Leakage Inductance

Hipot voltage: 1500Vrms

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

RoHS compliant version is available

Custom design is also available

LECTRICAL

PECIFICATION @

25°C

Part

Number

835-00835F

835-00836F

835-00837F

835-00838F

835-00839F

835-00840F

835-00841F

Turns Ratio

Pri : Sec

1 : 0.07

1 : 0.08

1 : 0.11

1 : 0.15

1 : 0.35

1 : 0.57

1 : 0.67

Pri : Bias

1 : 0.36

1 : 0.33

1 : 0.36

1 : 0.35

1 : 0.33

Inductance

at 0A

(uH

Inductance Leakage

at Ipk

Inductance

(uH Min)

(nH Max)

40.5

31.5

36.0

31.5

33.3

7.9

4.2

3.4

1.9

0.6

0.4

DCR

(mOhm Max)

Pri

195

138

130

Sec

Bias

195

150

180

165

150

385

370

Ipk

(A)

Secondary

Output

Vout=1.8V,7.2A

Vout=2.5V,5.2A

Vout=3.3V,3.9A

Vout=5.0V,2.6A

Vout=12V,1.1A

Vout=19.5V,0.67A

Vout=24V,0.54A

2.3

2.2

2.1

2.0

Notes:

1. Inductance is measured at 250kHz, 0.3Vrms.

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 the secondary windings connected in parallel.

6. Output of the secondary is with the windings connected in parallel. Bias winding output is 12V, 20mA.

7. 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

PX001(01)

Revised in 12/03

835-00837F Related Products

	835-00837F	835-00841F	835-00840F	835-00835F	835-00836F	835-00838F
Description	SMPS Transformer, 13W, ROHS COMPLIANT	SMPS Transformer, 13W, ROHS COMPLIANT	SMPS Transformer, 13W, ROHS COMPLIANT	SMPS Transformer, 13W, ROHS COMPLIANT	SMPS Transformer, 13W, ROHS COMPLIANT	SMPS Transformer, 13W, ROHS COMPLIANT
Is it lead-free?	Lead free	Lead free	Lead free	Lead free	Lead free	Lead free
Is it Rohs certified?	conform to	conform to	conform to	conform to	conform to	conform to
package instruction	ROHS COMPLIANT	ROHS COMPLIANT	ROHS COMPLIANT	ROHS COMPLIANT	ROHS COMPLIANT	ROHS COMPLIANT
Reach Compliance Code	unknown	unknow	unknown	unknown	unknown	unknown
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Other features	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.11	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.67	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.57	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.07	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.08	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.15
high	8.38 mm	8.38 mm	8.38 mm	8.38 mm	8.38 mm	8.38 mm
Maximum input voltage	72 V	72 V	72 V	72 V	72 V	72 V
Minimum input voltage	36 V	36 V	36 V	36 V	36 V	36 V
length	17.15 mm	17.15 mm	17.15 mm	17.15 mm	17.15 mm	17.15 mm
Manufacturer's serial number	835-00837	835-00841	835-00840	835-00835	835-00836	835-00838
Installation features	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT
Number of primary windings	3	3	3	3	3	3
Number of secondary windings	2	2	2	2	2	2
Maximum operating frequency	250 kHz	250 kHz	250 kHz	250 kHz	250 kHz	250 kHz
Maximum operating temperature	125 °C	125 °C	125 °C	125 °C	125 °C	125 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Output voltage 1	3.3 V	24 V	19.5 V	1.8 V	2.5 V	5 V
method of packing	TAPE & REEL	TAPE & REEL	TAPE & REEL	TAPE & REEL	TAPE & REEL	TAPE & REEL
physical size	L17.15XB21.97XH8.38 (mm)	L17.15XB21.97XH8.38 (mm)	L17.15XB21.97XH8.38 (mm)	L17.15XB21.97XH8.38 (mm)	L17.15XB21.97XH8.38 (mm)	L17.15XB21.97XH8.38 (mm)
rated power	13 W	13 W	13 W	13 W	13 W	13 W
Primary inductance	40 µH	37 µH	37 µH	45 µH	35 µH	40 µH
surface mount	YES	YES	YES	YES	YES	YES
Transformer type	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER
width	21.97 mm	21.97 mm	21.97 mm	21.97 mm	21.97 mm	21.97 mm
Maker	Elec & Eltek	-	-	Elec & Eltek	Elec & Eltek	Elec & Eltek

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