LT3954IUHE#PBF

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The LT3954IUHE#PBF is a monolithic DC-DC converter with an integrated intelligent power-saving feature, it is categorized under PMIC - LED Drivers. It has the ability to drive up to two current limited strings of complementary Parallel LEDs, it is capable of efficiently operating in a wide range of Input voltage sources. The device provides an ultra-low quiescent current when the LEDs are activated and in parallel boost operation mode. It is implemented with a full wave low RDS(ON) Two channel synchronous rectifier step down regulator controller which has high conversion efficiency. The LT3954IUHE#PBF has many features like input voltage range of 4V – 48V, output voltage range 4.5V – 40V, superior dynamic load transient response, overload and output short-circuit protection, pulsed and continuous mode operation and up to 85% efficiency.

The most important factor for the LT3954IUHE#PBF is its integrated intelligent power-saving feature. This feature allows the device to automatically detect the power need of the LEDs and adjust its operating mode accordingly. If the LED current is lower, the device will switch to a low power mode in order to save power and extend the device’s life. The device can also reset in from microseconds, this allows the device to turn on very quickly in comparison to other LED drivers.

The LT3954IUHE#PBF also has a thermal over-temperature protection feature which will protect the device from thermal damage in case the LED load current is too high. The device also provides two programmable pins which can enable or disable the device’s features such as duration of the pulse mode and enable/disable the programming sequence.

The two channels of LT3954IUHE#PBF current limited step down regulator are major components when it comes to the application field and working principle of the device. The device’s converter output voltage is usually programmable for its applications. If the converter output voltage is in the range of 4.5V - 40V than its response is fast enough and is able to maintain the output voltage during sudden changes in load current. The two channels are also able to control the backlight application in TVs, projectors and Monitors that require multiple LED strings due to the device’s ability to control up to two current limited strings of complementary Parallel LEDs.

The working principle of the LT3954IUHE#PBF is rather simple in comparison to other LED drivers. The device is implemented with a full wave low RDS(ON) Two channel synchronous rectifier step down regulator controller. This means that the device is able to regulate the output voltage of the LEDs by converting the input voltage to the desired output voltage. By adjusting the output voltage of the device, the current drawn by the LEDs can be varied accordingly. This allows the device to be able to efficiently drive LEDs with different voltages and current requirements.

This device is mainly used in applications such as TVs, projectors, and monitors as they require multiple LED strings. The LT3954IUHE#PBF is also ideal for LED lighting applications due to its efficiency, and its ability to drive low power load with less quiescent current. The device can also be used in Point of Sales systems and commercial displays that require a high level of brightness and minimal energy usage.

The LT3954IUHE#PBF is a great DC-DC converter for LED applications due to its intelligent power-saving feature, fast transient response, overload and output short-circuit protection, thermal over-temperature protection, and more. The device also has a great efficiency of up to 85%, and can power up LEDs with different voltages and current requirements efficiently. This makes the LT3954IUHE#PBF a great device for powering multiple LED strings in TVs, Projectors, Monitors and other lighting applications.

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