LT3797IUKG#PBF

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LT3797IUKG#PBF is a type of PMIC (Power Management Integrated Circuit) - LED Drivers. Designed with a combination of MOSFET and an Op Amp, it delivers an adjustable current output. Below is a breakdown of its application fields and working principle.

Application Fields

The LT3797IUKG#PBF LED driver is a high efficiency device with a high output current. It is usually used for high-brightness LED lighting applications and other applications such as industrial lighting and automotive lighting. It is designed to operate at a wide range of output power and efficiency levels as it has adjustable current range from 0A to 32A.

The device features a high temperature range of -40°C to 125°C, making it suitable for use in harsh environments. It also has an over-temperature shutdown feature which prevents damage to the LED lights. Additionally, the device includes a high voltage protection feature that prevents LED damage.

LT3797IUKG#PBF is highly configurable and compatible with a variety of input voltages such as 24V/12V/5V, making it ideal for use in a wide range of applications.

Working Principle

The LT3797IUKG#PBF LED driver employs a combination of MOSFET and an Op Amp to deliver a constant and adjustable current output. The MOSFETs are configured in an H-bridge configuration, allowing for bidirectional current flow. The Op Amp integral to the LT3797IUKG#PBF is configured as a current source control circuitry, delivering a constant and adjustable current output.

The external components used with the LT3797IUKG#PBF are external MOSFETs, a shunt resistor, a sense resistor and an output capacitor. The external MOSFETs are configured in an H-bridge configuration to switch the output current flow. The shunt resistor is used to measure the output current, while the sense resistor is used to sense the output current. Lastly, the output capacitor is used to provide additional filtering of the output current.

The LT3797IUKG#PBF is capable of operating in both dimming/non-dimming mode. To operate in dimming mode, an external voltage needs to be applied to the adjustable current setting pin. By changing the voltage applied to the pin, the output current of the LED driver can be varied.

In addition to controlling the LED driver, the LT3797IUKG#PBF also features several other features such as over-current protection, over-temperature protection, over-voltage protection, short-circuit protection, and open circuit protection. These features help to protect the LED from damage due to various external factors.

The LT3797IUKG#PBF LED driver is a highly efficient and reliable device for a variety of applications. It is designed to operate at a wide range of output power and efficiency levels, ensuring reliable operation even in harshest environments. With its combination of a MOSFET and an Op Amp, the LED driver can deliver a constant and adjustable current output, making it ideal for a variety of LED applications.

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