WMSIC Electronic Components

HGSEMI LM7812CT

ModelLM7812CT
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 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
HGSEMI LM7812CT
Type
HGSEMI
Minimum package
1000 盒

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HGSEMI
Electronic Component
75uV
Electronic Component
LM7812CT
Electronic Component
1
Package
TO-220-3
Electronic Component
Linear Regulator(LDO)
Electronic Component
2.742g
Electronic Component
1
Electronic Component
BM0227699422
Operating Temperature
0℃~+125℃@(Ta)
Operating Voltage
35V
Output
Electronic Component
Output Voltage
12V
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.

LM7812CT(HGSEMI 华冠)产品概述

一、主要性能概述

LM7812CT 为固定输出的线性稳压器,输出电压为 +12V,单路输出,额定输出电流 1.5A,输入最高工作电压 35V。器件集成短路保护与过热保护,工作环境温度范围为 0℃ ~ +125℃(Ta)。在 120Hz 时电源纹波抑制比(PSRR)可达 55dB,输出噪声典型值约 75µV,适合对纹波与噪声有一定要求的中低功率稳压场合。器件采用常见的 TO-220-3 直插封装,便于散热与板级安装。

二、关键特性

  • 固定输出:+12V,单通道输出。
  • 输出电流:最大 1.5A(注意热限与散热条件)。
  • 工作电压:最高可承受 35V 输入。
  • 保护功能:内置短路电流限制和热关断保护,增强系统可靠性。
  • PSRR:55dB @120Hz,具有良好的交流纹波抑制能力。
  • 噪声:典型 75µV,适合对噪声敏感的模拟电路。
  • 封装:TO-220-3,便于外接大尺寸散热片。

三、封装与管脚定义

  • 封装形式:TO-220-3(带金属背板/引脚)。
  • 常见管脚排列(正面视角,自左至右):输入(Vin)、地(GND)、输出(Vout)。
  • 金属背板可直接接散热片或外壳,提高功率耗散能力;安装时注意绝缘要求与散热接触面。

四、使用建议与典型电路

  • 建议输入电压:为保证稳压器正常稳压,输入电压应高于输出电压加上压差(典型约 2V),建议输入范围约 14V ~ 35V。
  • 旁路电容:在输入端并联 0.33µF(陶瓷或电解)以抑制高频振荡;输出端并联 0.1µF 和适当的电解电容(如 10µF)以提高瞬态响应和稳定性。
  • 散热:在接近额定电流工作时需采用合适散热片,计算环境温度与热阻以控制结温在安全范围内。
  • 保护与滤波:对强烈纹波或反向电压情况,可在输入端增加滤波器或保护二极管,输出端在驱动电感性负载时注意回流路径。

五、典型应用场景

  • 工业及控制电源模块,为单片机、传感器和模拟电路提供稳定 12V 电源。
  • 消费类电子中低功率电源、测试设备、实验台电源模块。
  • 嵌入式系统供电、电机驱动辅助电源(注意瞬态电流与散热)。
  • 其它需要高稳定性、低噪声 12V 轨道的应用场合。

六、热管理与可靠性注意事项

  • 在 1.5A 负载下器件功耗为 (Vin - 12V) × Iout,功耗随输入电压上升迅速增大,务必评估并配置足够散热。
  • 环境温度在高温区间(接近 +125℃)时,输出能力会受热关断/限流影响,应留有余量。
  • 长期可靠性考虑电解电容的寿命、焊接工艺与散热接触状态,必要时采用更大功率裕量或外部散热增强方案。

总结:LM7812CT(HGSEMI)为一款成熟可靠的线性稳压解决方案,适用于多种需要稳定、低噪声 12V 输出的中低功率场合。合理的输入电压选择、旁路电容和散热设计是保证长期稳定运行的关键。

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