WMSIC Electronic Components

HGSEMI LM7912T

ModelLM7912T
PackageTO-220-3
BrandHGSEMI
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
HGSEMI LM7912T
Type
HGSEMI
Minimum package
1000 盒

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HGSEMI
Electronic Component
LM7912T
Electronic Component
1
Package
TO-220-3
Electronic Component
Linear Regulator(LDO)
Electronic Component
2.825g
Electronic Component
1
Electronic Component
BM0227699424
Operating Voltage
21V
Output
Electronic Component
Output Voltage
11.52V~12.48V
Output Current
1A
Output Type
Electronic Component
Output Channel Count
1
Static Current(Iq)
7.8mA

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

LM7912T(HGSEMI 华冠)产品概述

LM7912T 是一款固定输出的线性负电压稳压器,输出额定约 -12V,适用于要求稳定负电源的小功率到中等功率场合。器件提供过流保护与过热保护,工作可靠,封装为常见的 TO-220-3,便于安装散热与电路集成。

一、主要特性

  • 固定输出:-12V(额定输出电压范围 -11.52V ~ -12.48V)
  • 输出电流:最大 1A
  • 静态电流(Iq):典型 7.8mA
  • 保护功能:内部过流限制与温度关断保护(短路与过热时自动限流/关断)
  • 输入工作电压上限:21V(请以具体器件数据手册为准)
  • 封装形式:TO-220-3,便于外接散热片

二、主要参数(关键信息)

  • 输出类型:固定负电压稳压器
  • 输出极性:负极
  • 输出通道数:1 路
  • 典型噪声与纹波抑制:线性器件固有优势(视具体应用需加滤波电容)
  • 温度与可靠性:内置热关断提高系统容错能力

三、典型应用

  • 运算放大器及模拟前端的对称负电源
  • 音频放大器与前级供电
  • 工业控制、通讯设备的负电源轨
  • 实验室电源与电路调试平台

四、使用要点与布署建议

  • 输入电压必须始终高于输出电压一定裕量,且不超过器件规定的最大值(示例工作电压 21V)。实际选型时考虑最大输入电压与电源浪涌。
  • 功耗计算:Pd = (Vin - |Vout|) × Iout。1A 工作时差分电压会直接转换为热量,需评估并配置合适散热器。
  • 静态电流约 7.8mA,会在无负载或轻载时带来额外损耗,电池供电场合需注意待机损耗。

五、封装与散热

TO-220-3 封装利于直接安装散热片;在 1A 输出或较高差分电压时必须加装散热片或设计良好散热路径。为保证长期稳定运行,建议根据 Pd 估算所需散热阻并留足安全裕量。

六、外围建议与典型接法

  • 为保证稳定性与瞬态响应,常配输入 0.33µF(陶瓷)近端旁路电容和输出 0.1µF(陶瓷)或 10µF(电解/固态)电容于输出与地之间;具体数值可按负载与频谱要求调整。
  • 接线注意:输入、地、输出三端需按数据手册引脚定义连接,地与系统地应充分共地,避免回路噪声。
  • 保持良好散热与气流,避免长期在热关断触发边界工作。

总结:LM7912T(HGSEMI)以简单可靠的固定 -12V 输出、内置保护与通用 TO-220 封装,适合需要稳定负电源且对成本与可靠性有要求的多种应用场景。选型与设计时请参照华冠提供的完整数据手册,以获得准确的电气特性与应用指南。

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