835-01045F datasheet, PDF - EEWORLD Datasheet

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835-01045F: DescriptionSMPS Transformer, 7W, ROHS COMPLIANT; CategoryPower management transformer; File Size49KB，2 Pages; ManufacturerElec & Eltek; Websitehttp://www.eleceltek.com; Environmental Compliance

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835-01045F Overview

SMPS Transformer, 7W, ROHS COMPLIANT

835-01045F 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 1:0.19
high	11.43 mm
Maximum input voltage	57 V
Minimum input voltage	24 V
length	12.7 mm
Manufacturer's serial number	835-01045
Installation features	SURFACE MOUNT
Number of primary windings	2
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	L12.7XB15.24XH11.43 (mm)
rated power	7 W
Primary inductance	155 µH
surface mount	YES
Transformer type	SMPS TRANSFORMER
width	15.24 mm
Base Number Matches	1

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E & E Magnetic Products Limited

POWER TRANSFORMER

Flyback Transformer for PoE

For Texas Instruments TPS23753 (PD) Controller

CHEMATICS

Flyback transformers designed for PoE (IEEE802.3af)

powered devices with up to 7 Watts

Designed for 250kHz switching frequency (continuous mode)

with input of 24 - 57V

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

835-01045

835-01046

RoHS

Part

Number

835-01045F

835-01046F

Turns Ratio

Pri : Sec

1 : 0.19

1 : 0.262

Pri : Bias

1 : 0.667

Inductance

at 0A

(uH ± 10%)

155

Inductance Leakage

at Ipk

Inductance

(uH Min)

(uH Max)

139.5

4.00

3.60

DCR

(mOhm Max)

Pri

414

Bias

822

Sec

Ipk

(A)

Secondary

Output

0.65 Vout=3.3V,2.12A

0.65

Vout=5.0V,1.4A

Notes:

1. Inductance is measured at 250kHz, 0.1Vrms, 0Adc.

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

3. DCR for the secondary is per winding.

4. Leakage Inductance measured between pins 3 and 4 with all other pins shorted.

5. Turns ratio is with 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°

to +85°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

PX235(02)

Revised in 08/08

835-01045F Related Products

	835-01045F	835-01046F	835-01045	835-01046
Description	SMPS Transformer, 7W, ROHS COMPLIANT	SMPS Transformer, 7W, ROHS COMPLIANT	SMPS Transformer, 7W	SMPS Transformer, 7W
Is it lead-free?	Lead free	Lead free	Contains lead	Contains lead
Is it Rohs certified?	conform to	conform to	incompatible	incompatible
Maker	Elec & Eltek	Elec & Eltek	Elec & Eltek	Elec & Eltek
Reach Compliance Code	unknown	unknown	unknown	unknown
ECCN code	EAR99	EAR99	EAR99	EAR99
Other features	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.19	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.262	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.19	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.262
high	11.43 mm	11.43 mm	11.43 mm	11.43 mm
Maximum input voltage	57 V	57 V	57 V	57 V
Minimum input voltage	24 V	24 V	24 V	24 V
length	12.7 mm	12.7 mm	12.7 mm	12.7 mm
Manufacturer's serial number	835-01045	835-01046	835-01045	835-01046
Installation features	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT
Number of primary windings	2	2	2	2
Number of secondary windings	2	2	2	2
Maximum operating frequency	250 kHz	250 kHz	250 kHz	250 kHz
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C
Output voltage 1	3.3 V	5 V	3.3 V	5 V
method of packing	TAPE & REEL	TAPE & REEL	TAPE & REEL	TAPE & REEL
physical size	L12.7XB15.24XH11.43 (mm)	L12.7XB15.24XH11.43 (mm)	L12.7XB15.24XH11.43 (mm)	L12.7XB15.24XH11.43 (mm)
rated power	7 W	7 W	7 W	7 W
Primary inductance	155 µH	155 µH	155 µH	155 µH
surface mount	YES	YES	YES	YES
Transformer type	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER
width	15.24 mm	15.24 mm	15.24 mm	15.24 mm
Base Number Matches	1	1	1	1

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