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UTC LM7812AL-TA3-T LM7812AL
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- UTC LM7812AL-TA3-T
- Type
- UTC
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 2V
- Electronic Component
- UTC
- Electronic Component
- 75uV
- Electronic Component
- LM7812AL-TA3-T
- Electronic Component
- 1
- Package
- TO-220
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 2.542g
- Electronic Component
- 1
- Electronic Component
- BM0072934697
- Operating Temperature
- 20℃~+125℃@(Tj)
- Operating Voltage
- 27V
- Output
- Electronic Component
- Output Voltage
- 12V
- Output Current
- 1.5A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM7812AL-TA3-T 产品概述
一、产品简介
LM7812AL-TA3-T 是UTC（友顺）提供的一款12V固定输出线性稳压器（LDO），单路正极输出，封装为 TO-220，面向需要稳定、低噪声直流电源的应用场景。器件集成过热保护与过流限制，适合工业级与消费类电源设计。
二、主要性能参数
- 输出电压：12V（固定）
- 输出电流：最大 1.5A
- 工作电压/耐压：典型工作输入可达 27V（器件设计耐压可支持接近 30V 的输入）
- 压差（Dropout）：约 2V（视负载与温度略有变化）
- 静态电流（Iq）：约 8mA
- 电源纹波抑制比（PSRR）：55dB @ 120Hz
- 输出噪声：约 75µV（典型）
- 工作结温范围：-20℃ ~ +125℃ (@Tj)
- 保护特性：过热保护、过流保护
- 通道数：1（单路）
- 封装：TO-220（带安装孔，便于散热）
三、保护特性与可靠性
器件内置过流限制与热关断功能，可在短路或过载情况下自动限制输出电流并在温度过高时关闭输出，待温度恢复后自动重启。这些保护措施提高了系统容错能力，降低了因意外短路或散热不足导致的损坏风险。但需注意，长期在高压差与大电流下工作会产生大量热量，应通过合理的散热设计保证长期可靠性。
四、热设计与布板建议
由于线性稳压器以功率耗散形式降压，Pdiss = (Vin - Vout) × Iout。举例：当 Vin = 27V、Vout = 12V、Iout = 1.5A 时，最大耗散约为 22.5W，需采用合适的散热片或强制风冷。TO-220 金属背板通常与输出端相连，安装时须留意绝缘与接触，避免散热片与电路其他节点短路。布局上建议输入、输出电容尽量靠近引脚、走线短且宽，以降低寄生阻抗和纹波耦合。
五、典型外部元件与应用注意事项
- 输入端建议并联旁路电容（如 0.33µF 陶瓷 + 大容量电解 10µF）以抑制输入瞬态与稳定性；输出端建议使用 0.1µF 陶瓷并联 10µF 电解或钽电容以改善瞬态响应与抑制振荡。具体值可根据负载特性与 PCB 布局调整。
- 输出端与散热片连接前确认金属背板电位（通常为输出），必要时使用绝缘垫与绝缘螺丝。
- 适用于仪器仪表、工业控制电源、嵌入式系统以及对噪声与纹波有较高要求但能接受线性功耗的场合。
- 设计时应评估输入-输出电压差与预期负载，以确定散热方案与是否需要并联多只器件或改用开关稳压器以提升效率。
总结：LM7812AL-TA3-T 提供稳健的固定 12V 输出、良好的纹波抑制与低噪声特性，内置保护功能，适用于对输出品质有要求且可接受线性稳压器损耗的多种应用场景。设计时重点关注输入电压范围与散热管理，以保证稳定可靠的长期运行。
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