The **TPS16632** is a high-voltage integrated eFuse (electronic fuse) from Texas Instruments designed for industrial and telecommunications applications. It provides robust protection against overvoltage, overcurrent, and short-circuit events. --- ### 1. Key Technical Specifications | Parameter | Value / Range | | :--- | :--- | | **Operating Voltage ($V_{IN}$)** | 4.5 V to 60 V | | **Absolute Maximum Voltage** | 62 V | | **Current Rating** | Up to 6 A | | **Integrated MOSFET $R_{ON}$** | 31 mΩ (Typical) | | **Package** | 24-pin VQFN (4mm x 4mm) | --- ### 2. Major Functional Blocks The TPS16632 integrates several electronic components into a single silicon chip: 1. **Integrated Power MOSFET**: A 31-mΩ N-channel MOSFET acts as the main switch to connect or disconnect the load. 2. **Current Sensing**: Internal circuitry monitors the current flowing through the MOSFET without requiring an external shunt resistor. 3. **Charge Pump**: Since it uses an N-channel MOSFET on the high side, an internal charge pump generates the necessary gate-drive voltage. 4. **Control Logic**: Manages the UVLO (Under-Voltage Lockout), OVP (Over-Voltage Protection), and thermal shutdown features. --- ### 3. Protection Features The device is engineered to replace traditional fuses or PolySwitches with more precise, resettable protection: * **Adjustable Current Limit**: The current limit is set by an external resistor ($R_{ILIM}$). When the current exceeds this threshold, the device modulates the gate to maintain a constant current or shuts down. * **Programmable Overvoltage Protection**: An external resistor divider on the `OVLO` pin sets the voltage threshold at which the device will disconnect the output to protect downstream components. * **Safe Operating Area (SOA) Protection**: It ensures the internal MOSFET operates within safe limits during high-power events, preventing silicon damage. * **Thermal Shutdown**: If the junction temperature exceeds ~150°C, the device turns off until it cools down. --- ### 4. Application Circuit (Conceptual) To use the TPS16632, the following external passive components are typically required: ```mermaid graph LR Vin[Input Voltage] --> TPS[TPS16632] TPS --> Vout[Protected Load] R_ILIM[Resistor: Current Limit] --- TPS R_UVLO[Resistor: Under Voltage] --- TPS C_dVdt[Capacitor: Slew Rate Control] --- TPS ``` --- ### 5. Differences within the TPS1663x Family | Feature | TPS16630 | TPS16632 | | :--- | :--- | :--- | | **Fault Response** | Latch-off | **Auto-Retry** | | **Best For** | Systems requiring manual reset | Systems requiring self-recovery |