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CJ LM317
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ LM317
- Type
- CJ
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 40V
- Electronic Component
- CJ
- Electronic Component
- LM317
- Electronic Component
- 1
- Package
- SOT-223
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 2.666g
- Electronic Component
- 1
- Electronic Component
- BM0142666116
- Operating Temperature
- 0℃~+125℃@(Tj)
- Operating Voltage
- 40V
- Output
- Electronic Component
- Output Voltage
- 1.2V~37V
- Output Current
- 1.5A
- Output Type
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM317 线性稳压器产品概述
LM317是一款广泛应用的可调线性稳压器，以其高灵活性和良好的性能赢得了众多电子设计工程师的青睐。作为一款成型的小型稳压器，LM317具有输入电压范围高达40V，输出电流最大可达1.5A，适合多种应用场景，从简单的电源模块到复杂的电子系统都能找到它的身影。
1. 主要特点
输出电压调节范围：LM317可以调节的输出电压范围为1.2V至37V，能够满足大部分低压应用的需求。用户只需通过外部电阻网络设置所需的输出电压，便于设计和集成。
高输入电压：该器件支持高达40V的输入电压，适合需要较宽输入电压范围的应用。对于一些需求在电源电压不稳或高峰电压情况下工作的设备，LM317提供了极好的可靠性。
输出电流能力：LM317能够提供最大为1.5A的输出电流，适合在负载电流变化较大的场合使用而无需担心过载。
封装：LM317一般采用SOT-223封装，便于在空间受限的电路板上进行布局，同时其引脚设计也方便焊接及连接。
2. 应用场景
LM317广泛应用于各类电子产品中，主要包括：
开关电源：作为线性稳压器，LM317可用于开关电源的后端，为具有不同工作电压要求的部件提供稳定的电压。
电池供电的应用：在电池管理系统中，LM317可以作为稳压输出，用于提供适当电压给负载，确保电港运行的稳定性。
仪器仪表：在要求严格、电压敏感的仪器应用中，LM317能够为传感器、放大器以及模数转换器等提供稳定的电源。
自定义电源模块：设计者可以通过选择合适的外部电阻设置所需的输出电压，进而方便地在原型和产品中集成LM317，以实现电源管理功能。
3. 工作原理
LM317的工作原理是基于负反馈机制。当输出电压有所变化时，LM317通过内部的反馈控制回路来调整其内部的电流输出，以保持输出电压稳定。因此，对于电源不稳定或负载变化的情况，LM317能够迅速响应并进行调整。
4. 设计注意事项
在使用LM317设计电源电路时，有几个因素需特别注意：
散热：LM317可以承受较大的输出电流，但产生的热量也相对较高。因此，在高负载的情况下，实现良好的散热是必不可少的，通常建议使用散热片来提升其散热性能。
输入与输出电压差：在选择输入电源时，必须确保其电压高于所需输出电压，以免造成稳压失效。通常推荐输入电压需至少高出1.5V。
外部元件选择：为了确保LM317的稳定工作，需要合理选择输入和输出电容，可以懈怠高频和低频的去耦。
5. 结论
综上所述，LM317作为一款可调线性稳压器，具备了高输入电压、可调输出电压和较大输出电流的优点，适用于多种电子产品中。其灵活的设计及广泛的应用领域，使得LM317成为电子工程师在设计电源方案时常用的选择。通过合理的设计和应用，LM317能够为各类电子设备提供稳定的电压供应，确保系统的可靠性与性能。
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