The **TPS1663_V02** typically refers to a specific evaluation module (EVM) or a hardware revision for the **TPS1663** integrated circuit. The TPS1663 is a high-voltage eFuse (electronic fuse) designed by Texas Instruments to provide robust protection for industrial power supplies. --- ## 1. Core Component: TPS1663 Integrated Circuit The heart of the board is the **TPS1663**, which is a 60V, 6A power-limiting device. It integrates a power MOSFET and several protection circuits into a single package. ### Key Features of the IC | Feature | Description | | :--- | :--- | | **Input Voltage** | Wide range from 4.5V to 60V (withstands up to 62V). | | **Current Limit** | Adjustable from 0.6A to 6A via an external resistor. | | **Protection** | Overcurrent, Overvoltage, Undervoltage, and Reverse Polarity. | | **Power Limiting** | Adjustable Power Limiting (PLIM) to maintain Safe Operating Area (SOA). | --- ## 2. Key Electronic Parts on the V02 Board On the "V02" revision of the evaluation board, you will find several passive and active components that configure the chip's behavior: ### A. Resistor Networks (Configuration) * **$R_{ILIM}$:** Sets the current limit threshold. If the load exceeds this, the device clamps the current. * **$R_{PLIM}$:** Sets the power limit. This prevents the internal MOSFET from overheating during high-voltage drops. * **$R_{UVLO} / R_{OVLO}$:** Voltage dividers connected to the Enable/UVLO and OVLO pins to set the exact voltages where the fuse turns ON or OFF. ### B. Capacitors (Timing and Stability) * **$C_{dVdt}$:** This capacitor controls the **Slew Rate**. A larger capacitor ensures a slower "soft start" to prevent massive inrush currents when charging downstream bulk capacitors. * **$C_{OUT}$:** Bulk output capacitors used for ripple filtering and stability. * **$C_{TMR}$:** The Fault Timer capacitor. It determines how long the device allows an overcurrent event before it shuts down (trips). ### C. Connectors and Indicators * **Input/Output Terminal Blocks:** High-current screw terminals for $V_{IN}$ and $V_{OUT}$. * **Status LEDs:** Usually, boards have LEDs to indicate "Power Good" (PG) or "Fault" conditions. * **Jumpers:** Allow the user to switch between **Latch-off** mode (stays off after a fault) and **Auto-retry** mode (tries to restart periodically). --- ## 3. Circuit Protection Layout The V02 design typically includes traces and pads for: 1. **TVS Diodes:** Placed at the input to suppress high-voltage transients (surges). 2. **Schottky Diodes:** Often placed at the output to prevent negative voltage spikes when inductive loads are disconnected. --- ## 4. Technical Specifications Summary | Parameter | Value (TPS1663x) | | :--- | :--- | | **Package** | 24-pin VQFN | | **$R_{DS(on)}$** | ~31 mΩ (typical) | | **Operating Temp** | -40°C to 125°C | | **Response Time** | < 5 µs (Short circuit) | ---