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835-00844F: 产品描述SMPS Transformer, 3W, ROHS COMPLIANT; 产品类别电源管理变压器; 文件大小94KB，共2页; 制造商Elec & Eltek; 官网地址http://www.eleceltek.com; 标准

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835-00844F概述

SMPS Transformer, 3W, ROHS COMPLIANT

835-00844F规格参数

参数名称	属性值
是否无铅	不含铅
是否Rohs认证	符合
厂商名称	Elec & Eltek
包装说明	ROHS COMPLIANT
Reach Compliance Code	unknown
ECCN代码	EAR99
其他特性	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:07; 1:0.70
高度	9.02 mm
最大输入电压	57 V
最小输入电压	33 V
长度	10.67 mm
制造商序列号	835-00844
安装特点	SURFACE MOUNT
初级绕组数量	2
次级绕组数量	2
最大工作频率	250 kHz
最高工作温度	85 °C
最低工作温度	-40 °C
输出电压 1	12 V
包装方法	TAPE & REEL
物理尺寸	L10.67XB13.21XH9.02 (mm)
额定功率	3 W
初级电感	310 µH
表面贴装	YES
变压器类型	SMPS TRANSFORMER
宽度	13.21 mm

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E & E Magnetic Products Limited

CHEMATICS

Flyback transformers designed for PoE (IEEE802.3af)

powered devices with up to 3 Watts

POWER TRANSFORMER

Flyback Transformer for PoE

Providing Power to PoE devices with up to 3 Watts

Designed for 250kHz switching frequency (continuous mode)

with input of 33 - 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

835-00842

835-00843

835-00844

RoHS

Part

Number

835-00842F

835-00843F

835-00844F

Turns Ratio

Pri : Sec

1 : 0.19

1 : 0.28

1 : 0.70

Pri : Bias

1 : 0.70

Inductance

at 0A

(uH ± 10%)

310

Inductance Leakage

at Ipk

Inductance

(uH Min)

(nH Max)

279.0

4.75

4.50

4.25

DCR

(mOhm Max)

Pri

1020

1040

Bias

2010

Sec

118

700

Ipk

(A)

0.3

Secondary

Output

Vout=3.3V,0.91A

Vout=5.0V,0.6A

Vout=12V,0.25A

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

PX203(01)

Revised in 06/12

835-00844F相似产品对比

	835-00844F	835-00842	835-00842F	835-00843	835-00843F	835-00844
描述	SMPS Transformer, 3W, ROHS COMPLIANT	SMPS Transformer, 3W	SMPS Transformer, 3W, ROHS COMPLIANT	SMPS Transformer, 3W	SMPS Transformer, 3W, ROHS COMPLIANT	SMPS Transformer, 3W
是否无铅	不含铅	含铅	不含铅	含铅	不含铅	含铅
是否Rohs认证	符合	不符合	符合	不符合	符合	不符合
厂商名称	Elec & Eltek	Elec & Eltek	Elec & Eltek	Elec & Eltek	Elec & Eltek	Elec & Eltek
Reach Compliance Code	unknown	unknown	unknown	unknown	unknown	unknown
ECCN代码	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
其他特性	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:07; 1:0.70	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.19; 1:0.70	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.19; 1:0.70	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.28; 1:0.70	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:0.28; 1:0.70	BREADTH & HEIGHT DIM. INCLUDES TERMINALS ALSO; FLY BACK; TURNS RATIO IS 1:07; 1:0.70
高度	9.02 mm	9.02 mm	9.02 mm	9.02 mm	9.02 mm	9.02 mm
最大输入电压	57 V	57 V	57 V	57 V	57 V	57 V
最小输入电压	33 V	33 V	33 V	33 V	33 V	33 V
长度	10.67 mm	10.67 mm	10.67 mm	10.67 mm	10.67 mm	10.67 mm
制造商序列号	835-00844	835-00842	835-00842	835-00843	835-00843	835-00844
安装特点	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT
初级绕组数量	2	2	2	2	2	2
次级绕组数量	2	2	2	2	2	2
最大工作频率	250 kHz	250 kHz	250 kHz	250 kHz	250 kHz	250 kHz
最高工作温度	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
最低工作温度	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
输出电压 1	12 V	3.3 V	3.3 V	5 V	5 V	12 V
包装方法	TAPE & REEL	TAPE & REEL	TAPE & REEL	TAPE & REEL	TAPE & REEL	TAPE & REEL
物理尺寸	L10.67XB13.21XH9.02 (mm)	L10.67XB13.21XH9.02 (mm)	L10.67XB13.21XH9.02 (mm)	L10.67XB13.21XH9.02 (mm)	L10.67XB13.21XH9.02 (mm)	L10.67XB13.21XH9.02 (mm)
额定功率	3 W	3 W	3 W	3 W	3 W	3 W
初级电感	310 µH	310 µH	310 µH	310 µH	310 µH	310 µH
表面贴装	YES	YES	YES	YES	YES	YES
变压器类型	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER	SMPS TRANSFORMER
宽度	13.21 mm	13.21 mm	13.21 mm	13.21 mm	13.21 mm	13.21 mm

835-00844F

835-00844F概述

835-00844F规格参数

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