LTC4056ETS8-4.2#TRPBF

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The LTC4056ETS8-4.2#TRPBF is a battery charger charging IC from the PMIC - Battery Chargers series. This device is a current and voltage programmable charger IC specifically designed for Lithium-Ion battery charging. It is an easy-to-use IC that incorporates current and voltage regulation circuitry, a power path management switch, and thermal regulation circuitry.

The typical application field of LTC4056ETS8-4.2#TRPBF is in hand-held portable devices, such as digital cameras, MP3 players, cell phones and other mobile devices, that are powered by a single Li-Ion battery. The chip is not only used in such devices, but also in medical equipment, military devices, robotic systems and any other application that requires either USB or AC wall adapter inputs and Li-Ion battery charging.

The working principle of LTC4056ETS8-4.2#TRPBF revolves around charging a single-cell lithium-ion battery with a flat-top voltage of 4.2V from a USB or AC wall adapter. The device includes a synchronous boost converter, an adjustable positive current-limit regulator, and a precise adjustable negative current-limit regulator. The device features a wide input voltage range (2.6V to 14V) and a powerful output current regulator which ensure a fast charge time with greater efficiency. The IC is available in an 8-pin thermally enhanced, low profile (1mm) ThinSOTT package.

The charger IC boosts the input voltage to a constant level and sets the current to the selected value. The device regulates the charge current to maintain an accurate constant current, along with a temperature sense signal. The controlled output current can be programmed either externally with a resistive divider (default) or with an internal, digitally controlled, PWM signal. The device also includes a backup timer, which can be adjusted to support trickle charging and safety timer features.

The IC also includes a power-path management switch, which enables the device to draw power from an external power supply, such as a USB or AC wall adapter, while simultaneously delivering power to the system. It also provides a means of controlling the charge current, over charge, and battery protection. In addition, the integrated features include low battery detection, charging status flags and cell protection.

The LTC4056ETS8-4.2#TRPBF is designed to safely and effectively charge a single-cell lithium-ion battery under a wide range of operating conditions. The device features current and voltage regulation circuitry, a power-path management switch, and thermal regulation circuitry, which provide an easy and reliable means of charging Li-Ion batteries from a USB or AC wall adapter. It is not only used in hand-held electronic devices but also has multiple other applications ranging from medical equipment to military devices and robotic systems.

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