LX2202CLQ

PMIC (Power Management Integrated Circuit) comprise a group of devices that are employed to control the voltage, current and other power parameters of electronic components and systems. Therefore, PMIC-Item Chargers play an integral role in different electronic systems. One of them is the LX2202CLQ, which is integrated in a variety of applications, namely consumer electronics, computing, and automotive. In some applications, the LX2202CLQ functions as either a battery charger or a step-down DC-DC converter. This article seeks to provide a thorough exploration of LX2202CLQ, by investigating its working principle and possible application fields.

Overview of LX2202CLQ

LX2202CLQ is a step-down DC-DC converter and single-cell Li-Ion battery charger integrated circuit, which is suitable for portable devices. It targets a wide variety of application levels and could drive an output current of 1 Amp. The most prominent feature that differentiates this IC from its peers is its high efficiency and its low standby current consumption, which is only 40μA.

LX2202CLQ integrates two main modes, which are the Battery Charging Mode (BCM) and the Direct Mode (DM). BCM is employed when the Li-Ion battery needs to be charged, using an external charger IC or directly from the power adapter. The DM is employed when the Li-Ion battery is not present and the IC provides an output from the input.

Working Principle

LX2202CLQ works by relying on four key blocks, which are the input power selector, boost block (step-down DC-DC converter), battery charger regulator, and LX2262-Q adjustable linear regulator.

The input power selector works by establishing the operating mode of the IC. This module automatically detects whether the external charger IC is used or the power adapter is connected when the selected voltage level is output. The selected voltage level is output based on the voltage of the PVUSB pin and then the working mode is determined.

The boost block (step-down DC-DC converter) is used to regulate the input voltage to an output voltage that is compatible with the battery voltage. This block works by using an external boost device to increase the voltage of the input voltage to achieve the desired output. Furthermore, this block provides an efficiency of 96.5%, which is exceptionally high compared to other ICs.

The battery charger regulator block is divided into two parts, the USB charger and the adapter charger. The USB charger is used to charge the battery from a USB power source, while the adapter charger is used to charge the battery from an adapter. This block works by detecting the voltage level of the PVUSB pin to determine the type of power source. When the voltage level is lower than 4.3V, the USB charger is used to charge the battery, while when the voltage level is higher than 4.3V, the adapter charger is employed to charge the battery.

The LX2262-Q adjustable linear regulator is used to provide the output voltage for the IC. This block works by supplying an adjustable voltage from 0V up to 5V from an input voltage source. It also has an excellent load regulation and a high-precision voltage accuracy. This block works by using the output voltage of the boost block and adjusting it to the required output voltage.

Application Fields

LX2202CLQ can be used in a wide range of applications, including consumer electronics, computing, and automotive. In the consumer electronics sector, it can be employed to provide an output voltage compatible with Li-Ion batteries. It can also be used in the computing sector to provide regulated power to the CPU, HDD, and other components. Furthermore, it can be employed in automotive applications to regulate the voltage and current in different car systems.

LX2202CLQ is an amazing power management IC and its application fields are quite vast. It is an efficient and reliable solution for many different sectors, as it is able to regulate the voltage and current while providing a low standby current consumption. All of these features make the LX2202CLQ the perfect IC to meet the power requirements of various electronic components and systems.