L6747C

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The L6747C is a control and regulation integrated circuit (IC) developed by STMicroelectronics that combines a two phase gate driver with an error amplifier for use in power conversion applications. The device is specifically designed to drive and control two gate-turn-off (GTO) power switches in the power switch network of a bidirectional DC-DC converter application. The output current is adjustable using an external voltage with the error amplifier. The L6747C reduces the components count, cost, and power losses while increasing the efficiency of the power supply system and improves the system performance.

The device consists of an input voltage regulator and two high current gate drivers built-in to an IC package. The input voltage regulator takes an input of up to 24V, and provides an adjustable output voltage of between 5V and 12V. The output voltage is adjustable using an external voltage applied to the error amplifier input. This regulation provides the gate driver with regulated power and ensures stable switching of the GTO in the presence of varying input voltage.

The two gate drivers provide a fixed voltage of the gate driver output. The fixed voltage of the gate driver output is adjustable using an external voltage applied to the error amplifier input. The gate driver output is controlled by its internal current limit and is adjustable using an external voltage. The device also has an integrated logic power supply that is used to power the logic functions of the driver including the enable pin and single-wire control. The enable pin on the L6747C can be operated with a logic-level voltage and is used to enable or disable the gate driver.

The two main features of the L6747C are its high current drive capability and its adjustable output. The high current drive capability of the device allows it to drive the GTO switch at high current levels that are sufficient to efficiently switch the GTO and achieve low conduction losses in the power switch network. The adjustable output feature allows the output voltage of the device to be adjusted using an external voltage and is used to set the threshold voltage of the GTO switch. This feature allows the L6747C to be used in a wide range of applications and is used to optimize the switching of the power switch network.

The L6747C is widely used in DC-DC converters and power supply applications including battery management, switch-mode power supplies, DC motor drives, UPS systems, automotive applications and many other applications. The device is also used in AC-DC converters, low-side drivers, voltage regulators, and other applications requiring a gate driver for switching a GTO switch. The device provides the high current, adjustable output, and low power dissipation that is needed for efficient and reliable power switching.

The L6747C offers high reliability and is capable of operating in a wide range of operating temperatures. The device is packaged in an industry standard SOT23-6 package, making it easy to integrate into existing designs. The device is rated for a maximum current of 5A and is capable of operating up to 85°C. It is also EMI/RFI immune, making it ideal for use in noisy environments.

In summary, the L6747C is a highly integrated, two-phase, gate driver IC developed by STMicroelectronics. The device offers high current output, adjustable output voltage and low power dissipation, making it suitable for driving and controlling GTO power switches in power switch networks in DC-DC and AC-DC converters and other applications requiring a gate driver for switching a GTO switch.

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