Datasheet 3D Model

Q4437-BL Surface Mount

Flyback Regulator Transformer

For flyback regulator applications using LM258X SIMPLE SWITCHER^®
Recommended and approved by National Semiconductor
Custom versions available

立即购买:

计数	单价
1	$5.69
250	$4.90
500	$4.25
1000	$3.68
2500	$3.20
5000	$2.79

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索取样品:

典型应用

与Texas Instruments LM258X (T5)一起使用

输入电压	输出			功率	Fsw
输入电压	Sec1	Sec2	Sec3	功率	Fsw
18 V — 36 V	5 V , 1.8 A	12 V , 0.25 A	12 V , 0.25 A	15 W	100 kHz

规格

Electrical specifications at 25°C.

零件号 (Hover for schematics)	0A时的电感 (µH) (公差: ±15%)	最小电感 3 A (µH)	DCR max 1				最大漏电感 (µH) 2	匝数比	电压-时间乘积 (V-µs)	隔离电压 (Vrms) 3
零件号 (Hover for schematics)	0A时的电感 (µH) (公差: ±15%)	最小电感 3 A (µH)	Pri (Ω)	Sec1 (mΩ)	Sec2 (mΩ)	Sec3 (mΩ)	最大漏电感 (µH) 2	Pri : Sec1 : Sec2 : Sec3	电压-时间乘积 (V-µs)	隔离电压 (Vrms) 3
Q4437-BL	55.0	47.3	0.110	35.000	300.000	320.000	2.0	1 : 0.5 : 1.167 : 1.167	299.7	500

注释

DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
Leakage inductance measured across the primary at 0.10 Vrms, 100 kHz.
500 Vrms isolation between windings.

端子:

RoHS-compliant – 260°C compatible. Tin-silver over tin over copper clad steel.
COTS Plus tin-silver-copper and tin-lead terminations available.

环境

环境:

符合RoHS

环境温度范围:

–40°C to +85°C

储存温度范围:

Component: –40°C to +85°C
Tray packaging: –40°C to +80°C

故障率（FIT）/平均故障间隔时间（MTBF）:

See FIT/MTBF Calculations

原理图

物理特性

一般规格

核心材料:

Ferrite

重量:

8.2 g

包装:

42 parts per tray

焊接/清洗

湿气敏感度等级（MSL）:

1 (unlimited floor life at <30°C / 85% relative humidity)

抗焊接热:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

焊接之前，请参阅焊接线艺元件。

PCB清洗:

Tested with pure water or alcohol only. More info.

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