The **ECH8655R-R-TL-H** is a high-performance, composite semiconductor device manufactured by ON Semiconductor (formerly Sanyo). It is specifically a **Dual N-Channel Power MOSFET** designed for high-density mounting. --- ### 1. Key Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Transistor Type** | 2 x N-Channel MOSFET | | **Drain-to-Source Voltage ($V_{DSS}$)** | 30V | | **Gate-to-Source Voltage ($V_{GSS}$)** | ±20V | | **Continuous Drain Current ($I_D$)** | 7A | | **On-Resistance ($R_{DS(on)}$) @ 4.5V** | ~17.5 mΩ (Typical) | | **Total Gate Charge ($Q_g$)** | 8.2 nC | | **Package Type** | ECH8 (8-pin SMT) | --- ### 2. Functional Features * **Low On-Resistance:** The device is engineered for very low resistance during conduction, which minimizes power loss and heat generation. * **4V Drive Compatibility:** It can be fully switched using a low gate-source voltage, making it compatible with logic-level controllers and battery-operated systems. * **Halogen-Free & RoHS Compliant:** The "-H" suffix indicates the device meets modern environmental safety standards. * **Ultra-Small Footprint:** The ECH8 package is extremely thin and compact, ideal for portable electronics where PCB space is at a premium. --- ### 3. Pin Configuration and Internal Structure The device contains two independent N-Channel MOSFETs within a single package. This allows for complex switching tasks while reducing the overall component count on a board. | Pin Number | Function | | :--- | :--- | | 1, 2, 7, 8 | Drain 1 & Drain 2 | | 3 | Gate 1 | | 4 | Source 2 | | 5 | Gate 2 | | 6 | Source 1 | --- ### 4. Common Applications * **Li-ion Battery Protection:** Used in protection circuits for smartphones and tablets to prevent over-discharge or over-charge. * **DC/DC Converters:** Acts as a high-speed switch in power conversion modules. * **Load Switching:** Used to turn peripheral power rails on or off to save energy. * **Motor Drivers:** Suitable for driving small DC motors in portable appliances. --- ### 5. Ordering Information Breakdown * **ECH8655R:** Part series number. * **R:** Specific characteristic/revision code (often relating to gate protection or internal diode). * **TL:** Tape and Reel packaging specification (Left-direction). * **H:** Halogen-free and Lead-free indicator.