LP8861Q1EVM Development Boards, Kits, Programmers

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Texas Instruments LP8861Q1EVM is an evaluation module for its LP8861Q1 programmable LED driver. This driver is suitable for LCD backlighting applications especially for those requiring various light levels and multiple zones. It offers two channels, six independent output current sinks that can be programmed up to six separate zones. The driver is built to provide flexibility and convenience, and allows designers to quickly evaluate the performance of LP8861Q1. It also meets space constraints and provides an accurate selection of components to simplify testing of multiple channels and applications. This article provides a thorough understanding of the application areas and working principles of the LP8861Q1EVM.

Application fields of LP8861Q1EVM

The LP8861Q1 programmable LED driver is designed to drive a wide range of LED types with variable current levels and multiple. The LP8861Q1EVM can support a variety of LED configurations with input LED voltage ranging from 2.8V to 5.5 V and input LED current up to 60mA. With a maximum of 6 current channels supported, the LP8861Q1EVM can provide a total of 90mA of total LED current. This is suitable for applications such as LCD backlighting or other applications requiring multiple zones.

The LP8861Q1EVM is also ideal for applications where uniformity of LED light emission is desired, such as LCD backlighting. The LP8861Q1 driver can be programmed to provide a uniform light emission across the entire LED array, ensuring that each LED produces equal light output, eliminating dark spots and areas of uneven lighting. Additionally, the LP8861Q1EVM allows advanced power-saving features to provide optimized LED current while keeping the LED light emission uniform, thus providing improved system power efficiency.

Working Principle of LP8861Q1EVM

The LP8861Q1 is the actual programmable LED driver that is mounted on the LP8861Q1EVM evaluation module. The LP8861Q1 programmable LED driver consists of an array of output stages and each output stage contains a set of configurable current sources. Each output stage is capable of providing up to 6 selectable output current levels from 10uA to 60mA, depending on the external components used in the circuit.

The LP8861Q1 is controlled by the I2C command and can be programmed to adjust the output current for each stage, thus providing flexibility for the output current control. The current level for each stage can be changed in increments of 10uA, providing precise control of the LED current. Furthermore, the LP8861Q1 allows multiple devices to be daisy-chained on the I2C bus, thus eliminating the hassle of multiple wiring connections.

The LP8861Q1EVM is designed to help developers quickly evaluate the performance of LP8861Q1. It comes with all the essential components, such as an inductor, a diode, an input capacitor, and an output capacitor, to make the system run. In addition, the board also comes with a series of headers that allow easy configuration of the output current levels of the LED driver.

Since the LP8861Q1 driver is mainly used in LCD backlighting applications, TI provides the LP8861QEVM board to provide an easy way to evaluate the features and performance of the LP8861Q1. The board also implements safety features such as a power-limit protection circuit that ensures that an invalid output current level is not applied to the LEDs which could potentially damage them. The board includes several diagnostic features, such as undervoltage monitoring, overvoltage monitoring, and open circuit protection, ensuring the safety of the system.

In conclusion, the LP8861Q1EVM is an essential evaluation module for the LP8861Q1 programmable LED driver. It offers a variety of features to aid in the evaluation and testing of the driver while offering a convenient board layout to simplify testing and proper wiring connections. The board also meets space constraints and provides an accurate selection of components to provide precise current levels while keeping the LED light emission uniform. As such, it is an ideal evaluation module for developers who are looking to develop applications using theLP8861Q1 programmable LED driver.

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