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LR8K4 PDF预览

LR8K4

更新时间： 2024-11-15 22:24:31
品牌 Logo 应用领域
超科 - SUPERTEX 稳压器
页数 文件大小 规格书
11页 600K
描述
High Input Voltage Adjustable 3-Terminal Linear Regulator

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LR8K4 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：TO-252包装说明：TO-252,
针数：3Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.37最大差分输入-输出电压：450 V
最小差分输入-输出电压：12 VJESD-30 代码：R-PSSO-G2
JESD-609代码：e0长度：6.566 mm
功能数量：1端子数量：2
工作温度TJ-Max：125 °C工作温度TJ-Min：-40 °C
最大输出电压 1：440 V最小输出电压 1：1.2 V
封装主体材料：PLASTIC/EPOXY封装代码：TO-252
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
调节器类型：ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR座面最大高度：2.38 mm
表面贴装：YES端子面层：TIN LEAD
端子形式：GULL WING端子节距：2.3 mm
端子位置：SINGLE处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：6.1 mmBase Number Matches：1

LR8K4 数据手册

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LR8  
High Input Voltage  
Adjustable 3-Terminal Linear Regulator  
Features  
General Description  
TheSupertexLR8isahighvoltage,lowoutputcurrent,adjustable  
linear regulator. It has a wide operating input voltage range of  
12V to 450V. The output voltage can be adjusted from 1.20V to  
440V provided that the input voltage is at least 10V greater than  
the output voltage. The output voltage can be adjusted by means  
of two external resistors R1 and R2 as shown in the typical  
application circuits. The LR8 regulates the voltage difference  
between VOUT and ADJ pins to a nominal value of 1.20V. The  
1.20V is amplified by the external resistor ratio R1 and R2. An  
internal constant bias current of typically 10µA is connected to  
the ADJ pin. This increases VOUT by a constant voltage of 10µA  
times R2.  
❏ 12V to 450V input voltage range  
❏ Adjustable 1.20V to 440V output regulation  
❏ 5% output voltage tolerance  
❏ Output current limiting  
❏ 10µA typical ADJ current  
❏ Internal junction temperature limiting  
Applications  
The LR8 has current limiting and temperature limiting. The  
outputcurrentlimitistypically15mAandtheminimumtemperature  
limit is 125°C. An output short circuit current will therefore be  
limited to 15mA. When the junction temperature reaches its  
temperature limit, the output current and/or output voltage will  
decrease to keep the junction temperature from exceeding its  
temperature limit. For SMPS start-up circuit applications, the  
LR8 turns off when an external voltage greater than the output  
voltage of the LR8 is applied to VOUT of the LR8. To maintain  
stability, abypasscapacitorof1.0µForlargerandaminimumDC  
output current of 500µA are required.  
❏ Off-line SMPS startup circuits  
❏ Adjustable high voltage constant current source  
❏ Industrial Controls  
❏ Motor controls  
❏ Battery chargers  
❏ Power supplies  
The device is available in TO-92, TO-243AA (SOT-89), and  
TO-252 (D-PAK) packages.  
LR8 Block Diagram and Typical Application  
*
V
OUT  
C2  
VIN  
VOUT  
V
IN  
ADJ  
R1  
LR8  
C1  
RLOAD  
R2  
*Required for conditions where VIN is less than VOUT  
.
12/03/01  
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability  
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to  
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the  
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.  
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LR8K4 替代型号

型号 品牌 替代类型 描述 数据表
LR8K4-G SUPERTEX

完全替代

 High Input Voltage Adjustable 3-Terminal Linear Regulator

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