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TMI TMI8261
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TMI TMI8261
- Type
- TMI
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TMI
- Electronic Component
- TMI8261
- Electronic Component
- 1
- Package
- SOP-8
- Electronic Component
- Brushed DC Motor Driver IC
- Electronic Component
- 0.19g
- Electronic Component
- 1
- Integrated FET
- Electronic Component
- H
- 1
- Features
- Current Sampling
- Electronic Component
- BM0228586182
- Resistor
- 63mΩ
- Operating Temperature
- 25℃~+85℃
- Operating Voltage
- 3V~18V
- Output Current
- 5A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
TMI8261 产品概述
一、产品简介
TMI8261 是拓尔微（TMI）推出的一款集成场效应管（Integrated FET）H 桥驱动芯片，封装为 SOP-8。芯片内部集成一对上下功率 MOSFET，形成单通道 H 桥，适用于中小功率直流电机与执行器的双向驱动。主要电气参数包括：输出峰值电流能力 5A（短时）、工作电压范围 3V～18V、导通电阻 Rds(on) 典型值 63mΩ、静态耗电 Iq≈1μA，工作温度范围为 -25℃～+85℃。
二、主要特性
- 集成 FET：内部集成高、低侧 MOSFET，外部无需独立功率管，简化 BOM 与 PCB 布局。
- 宽工作电压：3V～18V 的供电范围，兼容常见电池与车载 12V/24V 降压场景（需注意瞬态）。
- 低导通电阻：Rds(on) ≈ 63mΩ，有利于降低导通损耗与温升。
- 低静态电流：待机电流约 1μA，适合对续航敏感的电池供电设备。
- 封装紧凑：SOP-8 封装，便于中小体积应用的自动贴装生产。
三、典型应用场景
- 小型直流电机双向驱动（玩具、家电、智能窗帘等）。
- 线性/旋转执行器、微型泵、振动马达或步进预驱（配合合适控制）。
- 电动锁、继电器替代驱动、伺服控制中的驱动器单元。
- 低功耗便携设备中需要双向驱动的场合。
四、典型电气与热设计要点
- 功耗估算：在满载 5A 连续工况下，单次导通损耗近似为 P = I^2·Rds = 5^2×0.063 ≈ 1.575W，H 桥全通时损耗更高。实际使用多为脉冲或短时驱动，需按占空比修正平均功耗。
- 散热建议：SOP-8 封装散热能力有限，建议在 PCB 上使用大面积铜箔散热、热过孔过渡到底层，以及限制连续大电流工作时间或额外散热片。
- 去耦与滤波：电源端建议并联 0.1μF 高频陶瓷与 10μF 以上的电解/钽电容，靠近芯片 Vcc 与 GND 引脚安放，以抑制瞬态电压和减少 EMI。
- 布局注意：功率回路走线短且宽，低阻抗回流路径；逻辑信号走线远离大电流回路；GND 建议划分为功率地与信号地并在单点相连。
五、典型外部保护与使用建议
- 推荐在供电侧并联 TVS 或瞬态抑制电路以应对大电机反电动势与瞬态尖峰。
- 若需限流或精确电流监测，可在 H 桥负载侧串联电流采样电阻并配合外部电流感知电路。
- 对于长期高电流方案，建议在设计阶段评估热失效边界并增加温度监测或软限流策略。
- 上电/关断需遵循顺序缓冲，避免在电源瞬变时产生非正常导通。
六、优势概述
TMI8261 在同类小功率 H 桥产品中以低静态电流与集成 FET 的紧凑方案见长，适合对体积与待机功耗敏感的便携或嵌入式设备。宽电压带宽与 5A 的输出能力使其在多种中小功率驱动场景中具有良好的适应性。
如需进一步电气参数、引脚定义或参考电路，请参考厂商完整数据手册或联系拓尔微技术支持以获取原厂资料。
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