LTC4055EUF#PBF

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Applications of LTC4055EUF#PBF include general purpose battery charging, charge management, off-line battery charging, battery backup and solar panel battery charging. It belongs to the category of PMIC - Battery Chargers. It is a linear battery charger with high efficiency and minimal external parts.

The LTC4055EUF#PBF is a high current, non-synchronous linear battery charger. The charger is designed to operate with a wide input range from 5V to 24V and charges to a pre-set voltage as set by external resistors connected to the VREF pins. The battery charger has multiple protection features built-in for safe operation. It is well suited for small form-factor, portable equipment and can be used for both rechargeable and non-rechargeable batteries.

The LTC4055EUF#PBF includes the following features that make it suitable for applications of PMIC - Battery Chargers:

• Wide input range of 5V – 28V.
• Programmable charge current up to 500mA with external current sensing resistor.
• Programmable top voltage set with external voltage divider.
• Charge status output (BATFault) to signal full-charge.
• Logic-controlled input and charge enable pin.
• Reverse blocking input protection.
• Low quiescent current.
• Thermal regulation of the charge current.
• Protection against temperature, voltage, and current overshoots.
• LED indicators.

The working principle of the LTC4055EUF#PBF is based on the concept of charge management. The internal architecture includes a current sensing resistor, a power switch and a voltage divider. The battery charger is connected to an external power supply while the voltage and current across the battery are monitored by the current sensing and voltage divider respectively. Based on the battery voltage, the power switch and current regulation circuit are adjusted to maintain the desired battery voltage.

The LTC4055EUF#PBF monitors the battery charging process and provides over current protection. If the sensed battery voltage exceeds the setpoint, the power switch is turned off and the charging process is terminated. The voltage divider is used to set the desired battery voltage, with a voltage range from 3V to 10V.

The LTC4055EUF#PBF also provides thermal regulation of the charge current, allowing for efficient charging of the battery. At the set charging current, the internal temperature will rise, which is monitored and modulated by the chip according to the preset temperature dependent parameters. This ensures that no over heating or over voltage occurs, providing protection to the battery.

In summary, the LTC4055EUF#PBF is a highly efficient and versatile battery charger, well suited for applications of PMIC - Battery Chargers, such as general purpose battery charging, charge management, off-line battery charging, battery backup, solar panel battery charging, and many more. With its wide input range, programmable charge current, protection features, and low quiescent current, the LTC4055EUF#PBF is the optimal choice for many battery charging applications.

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