LX24132ILQ-TR

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The LX24132ILQ-TR integrated circuit, sometimes referred to as an IC, is a precision power management integrated circuit (PMIC). This versatile IC was designed primarily for use with LED drivers, and is available in the following packages: SOT-23-8, SOT-523-5, and TSSOP-8. The LX24132ILQ-TR is particularly useful for a variety of applications requiring dynamic backlighting, including LCD displays and automotive interior lighting.

Features

The LX24132ILQ-TR IC boasts a wide range of features that benefit designers of both power-consumption and performance-focused electronics. First, it comes with a Programmable Peak Inductor Current Trip Point (IPT) that allows both uniformity and efficiency within a design. With an adjustable current range between 2mA and 20mA, this IC can automatically switch between two MOSFETs to help guarantee that a target current limit won’t be exceeded. This eliminates the need for manual adjustments, making it easier to implement into automated systems if necessary.

Additionally, the LX24132ILQ-TR has many built-in safety measures to help protect LED drivers. These safeguards include overvoltage protection, undervoltage protection, programmable peak inductor current trip, and auto PWM/PFM switchable feature. The auto PWM/PFM switchable feature is particularly useful, as it enables the IC to switch between different operating modes depending on the load and input voltage conditions. This reduces power consumption, helping to increase the overall performance of the LED driver.

Working Principle

The LX24132ILQ-TR IC uses a standard buck topology that includes a high-side and low-side MOSFET switch, as well as a current sensing resistor. The IC is controlled by an internal voltage loop, which can be configured by setting the voltage on the control pin. The voltage control loop runs a feedback loop that monitors the voltage on the output and then adjusts the duty cycle for the MOSFET switch accordingly. The current flow through the two switches is monitored by the Current Sensing Resistor (CSR), thus allowing the IC to automatically adjust the duty cycle if necessary. This is a key feature, as it prevents the IC from producing damaging current levels when the load requirements increase.

Additionally, the LX24132ILQ-TR uses a synchronous rectifier to increase efficiency. Synchronous rectification involves the use of external FETs instead of diodes to handle the power conversion. By switching the synchronous rectifier on and off, there is a reduction in power losses, leading to improved efficiency. Plus, external FETs can also handle higher switching frequencies, enabling faster response times when necessary.

Conclusion

The LX24132ILQ-TR integrated circuit is a great choice for designers of both power-consumption and performance-focused electronics. With features such as programmable peak inductor current trip, undervoltage protection, and auto PWM/PFM switchable feature, it’s easy to see why this IC is so useful for LED driver applications. Additionally, its wide range of packages makes it adaptable to a variety of applications, from LCD displays to automotive interior lighting. With its robust features and wide range of applications, it’s clear why the LX24132ILQ-TR is a great choice for LED driver designs.

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