LX2203CLD-TR

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Power management integrated circuit (PMIC) devices handle a range of power management functions. Among these functions, adjustable battery chargers are used to charge batteries in a wide range of applications. The LX2203CLD-TR is one such PMIC device that can be used to provide adjustable charging current and charge termination settings. This article will discuss the application field and working principle of the LX2203CLD-TR.

Application Field

The LX2203CLD-TR is a monolithic adjustable battery charger from Semtech Corporation and is designed for use in mobile, handheld and portable devices. It is also ideal for use in battery operated systems such as emergency lighting, mobile tools, scooters and medical/diagnostic applications. The PMIC incorporates internal current limiting, thermal protection and adjustable charge termination features.

The device’s adjustable charge current extends up to 3A and the adjustable charge termination voltage range is 3.3V to 4.3V. It is designed to charge two-cell Li-Ion/Li-Polymer battery packs and has an input capability of up to 6V without the need for an external surge suppression device.

The device features reverse-blocking protection when the charger is disconnected from the input source, thereby preventing any reverse current. Furthermore, its wide operating temperature range of -40°C to +85°C and its low quiescent current makes the LX2203CLD-TR an ideal choice for space-limited applications.

Working Principle

At its most basic, the LX2203CLD-TR utilizes linear constant-current/constant-voltage (CC/CV) charging. The design of the PMIC includes an externally adjustable current limiter, which helps limit the charging current of the battery. The device is able to deliver up to 3A of charge current and its current limiting feature ensures that the battery will not be overcharged.

The device also features a charge termination feature, which can be set by adjusting the internal resistance network. This allows the user to select an appropriate termination voltage level in order to ensure that the battery has been adequately charged. The adjustable charge termination can be adjusted using on-board pins or external resistors.

The device also features a power good indicator, which is an LED indicator. When the LED is lit, it indicates that the device is ready to start charging the battery. The LED will turn off when the charge cycle is complete.

In addition to the charging features, the LX2203CLD-TR also provides reverse-blocking protection, which helps prevent any reverse current from entering the internal circuitry of the device when the charger is disconnected from the power source. This ensures that the device does not cause any unexpected damage or overload when it is disconnected from the power source.

The LX2203CLD-TR is a highly efficient, versatile and reliable adjustable battery charger. Its adjustable charge current, charge termination settings and reverse blocking protection make it suitable for a wide range of applications. Furthermore, its wide operating temperature range and low quiescent current make it ideal for space-limited applications. As such, the device is an ideal choice for a range of applications, from mobile devices to medical/diagnostic equipment.

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