L6385

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A L6385 Gate Driver is an integrated circuit (IC) used to drive high side and low side power MOSFETs or IGBTs in a DC to DC converter. It has the equivalent of two half-bridge drivers integrated onto one monolithic IC. It can be used to control high side and low side P-channel and N-channel power MOSFETs, IGBTs, and high power bipolar transistors.

The L6385 Gate Driver is ideal for use in power supply applications that require high levels of power drive capability and flexibility. It offers excellent protection features such as thermal shutdown, undervoltage lockout, short circuit current limiting, and overcurrent limitations. It also provides built-in electromagnetic interference (EMI) filters which help reduce common-mode noise and external component requirements. With its wide input voltage range, it is suitable for a range of switching frequencies.

The L6385 Gate Driver operates on an input voltage range from 3.2V to 20V and can source and sink up to 500mA of total gate current. It features an on-chip bootstrap capacitor which allows for easy high-side driver operation. It features anti-parallel diodes for ESD protection, a built-in deadtime generator, and adjustable multi-level slew rate outputs to optimize system noise and EMI performance. The device is available in a small 8-pin SOIC package.

The basic working principle of the L6385 Gate Driver is to provide the necessary drive signal to power MOSFETs or IGBTs in order to turn them on and off in a controllable manner. The device couples two independent half-bridge power drivers onto one monolithic IC. It provides the required level of gate drive current to turn the power device on and off, while also providing protection features to ensure safe operation.

The device features adjustable slew rates for both high and low side outputs, and includes adjustable dead time generator to optimize the transition time and reduce shoot through current. The diodes in the device are non-polarized and have a typical reverse design current of 8mA. The bootstrap capacitor eliminates the need for an external floating supply for the upper side FET and allows for easy high side driver operation.

The L6385 Gate Driver is used in a wide range of applications including motor control systems, switched mode power supplies, power inverters, DC-DC converters, AC-DC converters, and other high power switching systems. Due to its flexible design and high drive capability, it is suitable for a variety of switching frequencies, enabling it to be used in a wide range of applications.

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