LT3797ELXE#PBF

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LT3797ELXE#PBF is an LED driver IC from Linear Technology, a renowned semiconductor manufacturer. This device is primarily a boost LED driver, but can also be used as a buck LED driver. It is designed to provide efficient and accurate regulation of both ongoing and pulsed LED currents. This device includes a wide range of safety features, including a totally integrated current source, undervoltage lockouts, overcurrent monitoring, and brown-out protection.

The LT3797ELXE#PBF is suitable for driving both Single Color LEDs (White LEDs) and Multi-Color LED arrays. For single color LED applications, the LED current can be easily adjusted via a single external resistor (R2). For multi-color LED applications, independent LED strings can be connected to three channels allowing for same-color or multi-color lighting schemes. As output voltage is adjustable, LT3797ELXE#PBF can also be used as a buck-mode LED driver for driving low-current white LEDs or other low-voltage applications.

The LT3797ELXE#PBF is a high-efficiency boost LED driver with a wide input voltage range of 2.5V to 40V. Its adaptive auto-skip mode allows very low current operation when the output voltage is higher than the set value, reducing power losses and increasing battery life. The device has an internal clock that can support a variety of dimming modes such as PWM, analog dimming input and Direct current dimming input.

In terms of application field, due to the device’s high integration and its wide range of features, the LT3797ELXE#PBF can be used in a variety of LED lighting systems such as automotive lighting, general lighting, home electronics, handheld electronics, etc. The device can be used to drive any type of LED from a wide range of LED drivers, such as LED strips, LED drivers, LED bulbs, etc., in any lighting system, whether it is residential, commercial, industrial or automotive.

The LT3797ELXE#PBF has an efficient working principle. It works by regulating the output voltage and measuring an internal inductor current to generate a duty cycle signal. The signal is then used to control an external MOSFET switch, which acts as a switch to regulate the current through the LED arrays. The duty cycle signal can be varied to adjust the output current and to control the brightness of the LEDs.

The LT3797ELXE#PBF can also protect connected LEDs from overvoltage, overcurrent and undervoltage conditions. An integrated current sense reduces power losses by halting the output current when the maximum allowable limit is exceeded. Additional protection is provided by the undervoltage lockout and frequency jittering, ensuring the device will not lose control due to low voltages or other disturbances.

In conclusion, the LT3797ELXE#PBF is a PMIC – LED Driver applications, with an efficient and accurate regulation of both ongoing and pulsed LED currents. It can be used to drive any type of LED from a wide range of LED drivers such as LED strips, LED drivers, LED bulbs, etc. It is suitable for driving both single color and multi-color LED arrays. It also provides protection from overvoltage, overcurrent and undervoltage conditions.

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