## Overview of the L6393DTR The **L6393DTR** is a high-voltage, high and low-side driver produced by **STMicroelectronics**. It is primarily designed to drive N-channel power MOSFETs or IGBTs in half-bridge configurations. It is commonly used in motor control and power conversion applications. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the L6393DTR: | Parameter | Specification | | :--- | :--- | | **Type** | High and Low Side Gate Driver | | **Output Current** | 270 mA (Source), 430 mA (Sink) | | **High Side Voltage (Vboot)** | Up to 600 V | | **Operating Voltage (Vcc)** | 10 V to 20 V | | **Logic Compatibility** | 3.3 V and 5 V | | **Package** | SO-8 (Surface Mount) | | **Propagation Delay** | 125 ns (Typical) | --- ### 2. Core Internal Components The L6393DTR integrates several functional blocks that handle the logic-to-power interface: * **Logic Inputs:** Features Schmitt triggers to provide high noise immunity for both HIN (High Input) and LIN (Low Input). * **Deadtime Logic:** Prevents "shoot-through" (where both high and low side transistors are on simultaneously) by introducing a fixed delay. * **Undervoltage Lockout (UVLO):** A protection circuit that ensures the driver does not attempt to switch the external MOSFETs if the supply voltage is too low to provide a full gate charge. * **Bootstrap Diode:** Includes an internal high-voltage bootstrap diode, reducing the external component count and saving PCB space. --- ### 3. Pin Configuration Below is a description of the pinout for the SO-8 package: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **VCC** | Low side supply voltage. | | 2 | **HIN** | Logic input for high-side gate driver. | | 3 | **LIN** | Logic input for low-side gate driver. | | 4 | **GND** | Logic and power ground. | | 5 | **LVG** | Low-side gate driver output. | | 6 | **OUT** | High-side floating reference (Source of high-side FET). | | 7 | **HVG** | High-side gate driver output. | | 8 | **VBOOT** | High-side floating supply voltage. | --- ### 4. Typical Application Circuit When designing with the L6393DTR, a basic half-bridge setup usually follows this structure: ```cpp // Logic Diagram Representation [Microcontroller] ---> [HIN Pin] [Microcontroller] ---> [LIN Pin] [VCC] --- [C_filter] --- [GND] [VBOOT] -- [C_bootstrap] -- [OUT] [HVG] ---> [Gate of High-Side MOSFET] [LVG] ---> [Gate of Low-Side MOSFET] ``` ### 5. Notable Features * **Integrated Bootstrap Diode:** Unlike older drivers that require an external high-voltage diode, the L6393DTR has this built-in. * **dVs/dt Immunity:** The device is designed to be robust against high-frequency voltage fluctuations (noise) common in switching environments. * **Compact Design:** The SO-8 footprint makes it ideal for space-constrained applications like small BLDC motor drivers. ---