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LR8N3-GP005 PDF预览

LR8N3-GP005

更新时间: 2024-11-16 19:53:47
品牌 Logo 应用领域
美国微芯 - MICROCHIP 输出元件调节器
页数 文件大小 规格书
10页 918K
描述
1.2V-440V ADJUSTABLE POSITIVE REGULATOR, BCY3

LR8N3-GP005 技术参数

是否Rohs认证: 符合生命周期:Active
包装说明:TO-92,Reach Compliance Code:compliant
风险等级:5.67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:O-XBCY-T3
功能数量:1端子数量:3
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:UNSPECIFIED封装代码:TO-92
封装形状:ROUND封装形式:CYLINDRICAL
峰值回流温度(摄氏度):NOT SPECIFIED调节器类型:ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR
表面贴装:NO端子形式:THROUGH-HOLE
端子位置:BOTTOM处于峰值回流温度下的最长时间:NOT SPECIFIED
Base Number Matches:1

LR8N3-GP005 数据手册

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Supertex inc.  
LR8  
High Input Voltage,  
Adjustable 3-Terminal Linear Regulator  
Features  
General Description  
13.2 - 450V input voltage range  
Adjustable 1.20 - 440V output regulation  
5% output voltage tolerance  
Output current limiting  
The Supertex LR8 is a high voltage, low output current, adjustable  
linear regulator. It has a wide operating input voltage range of  
13.2 - 450V. The output voltage can be adjusted from 1.20 - 440V  
provided that the input voltage is at least 12V 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.  
10µA typical ADJ current  
Internal junction temperature limiting  
Applications  
Off-line SMPS startup circuits  
Adjustable high voltage constant current source  
Industrial controls  
Motor controls  
The LR8 has current limiting and temperature limiting. The output  
current limit is typically 20mA and the minimum temperature limit  
is 125°C. An output short circuit current will therefore be limited  
to 20mA. 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, a bypass  
capacitor of 1.0µF or larger and a minimum DC output current of  
500µA are required.  
Battery chargers  
Power supplies  
The device is available in TO-243AA (SOT-89), TO-252 (D-PAK),  
and TO-92 packages.  
Typical Application Circuit  
*
VOUT  
VIN  
VOUT  
VIN  
R1  
ADJ  
C1  
C2  
LR8  
RLOAD  
R2  
* Required for conditions where VIN is less than VOUT  
.
Doc.# DSFP-LR8  
B080113  
Supertex inc.  
www.supertex.com  

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