L6385ED

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PMIC - Gate Drivers - L6385ED Application Field and Working Principle

The L6385ED gate driver, produced by STMicroelectronics, is a high-performance double gate driver specifically designed for half-bridge topologies. This gate driver is mainly used for motor control applications, providing a fast response time of 10ns. It is also ideal for applications such as welding, uninterrupted power supplies, and other areas that require high-speed operation. The gate driver is based on an ultra-low-power low-speed 4MHz CMOS integrated circuit. This driver provides a wide range of features, including a complete protection suite, phase-shift control, and a feature-rich interface.

To understand the application field and working principle of the L6385ED gate driver, it is essential to explore its features, components, and design. The driver has a power supply voltage of 3.3 V to 24 V and integrates a high-speed double gate driver with a current driving capability of 0.5 A/1 A peak. This gate driver also integrates several protection components, such as over-voltage protection (OVP), short-circuit protection (SCP), over-current protection (OCP), and shoot-through protection (STP). Other features include an adjustable dead time, a PWM controlled speed ramp, and an adjustable delay between the two channels.

Using the L6385ED gate driver, the drive control signals are routed from the microcontroller to the gate drivers through the dedicated serial peripheral interface (SPI). The SPI provides a direct control over the gate driver’s operating voltage, current, and frequency. It also allows the user to configure the dead time, ramp speed, and delay between the two channels. The SPI control protocol also enables the use of the phase-shift control feature, providing an easy way to create a sinusoidal waveform.

The L6385ED gate driver provides a high level of safety and reliability thanks to its complete protection suite mentioned earlier. The OVP feature protects the driver from any overvoltage failure, while the SCP feature protects against any short circuit failures. The OCP feature limits the current maximum values, and the STP feature allows detection and protection of any possible shoot-through faults. Lastly, the driver includes a thermal shutdown feature that ensures safe operation even in extreme temperature conditions.

In conclusion, the L6385ED gate driver from STMicroelectronics provides high-speed performance along with a complete suite of features and protection functions. This driver is ideal for applications that require an ultra-low-power CMOS integrated circuit, fast response time, and additional safety functions. With its robust design and reliable performance, this gate driver is sure to become an essential part of many motor control applications.

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