LTC4054XES5-4.2#TRMPBF

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The LTC4054XES5-4.2#TRMPBF is a monolithic linear charger designed for Lithium-ion cells. It is categorized as a PMIC (Power Managements ICs) and is a battery charging IC from the family of battery chargers. The LTC4054XES5-4.2#TRMPBF is comprised of an integrated boost controller, ideal diode, charge current control, a maximum battery current limit, and a thermal shutdown circuitry to provide an enhanced safe, efficient and easy charging for a wide variety of Lithium-ion, Lithium Iron Phosphate, Ni-MH and Ni-Cd batteries.

The application field of the LTC4054XES5-4.2#TRMPBF is designed primarily for Lithium-ion cells. It is suitable for all the industry standard Li-Ion (3.6V) and LiFePO4 (3.2V) battery cells, which are typically found on mobile phones, digital cameras and portable audio players. It is also ideal for Li-Ion and LiFePO4 battery powered products, including wireless sensors, SMS terminals, wearables and GPS navigation systems. The IC is capable of operating with an input of 4.5V to 28V, making it suitable for applications, from USB and wall adapters to backup batteries.

The LTC4054XES5-4.2#TRMPBF comes with advanced features such as thermal regulation, input overvoltage protection, automatic trickle charging, full charging status monitoring and LED status indicator, thus making it a versatile IC adaptable to a wide range of application needs.

The integrating exact diode with a boost controller allows the IC to maximize Li-Ion cell efficiency, while keeping cell stress and ripple low. The embedded full and empty shutdown circuitry prevents overcharging of the battery, protecting the cell from any potential damage. Also, the IC has automatic trickle charging and cell voltage monitoring, enabling it to detect a full charge and end the charge cycle safely.

The working principle of the LTC4054XES5-4.2#TRMPBF is relatively simple. When an input voltage greater than 4.5V is applied to the device, it starts to charge the Li-Ion cell. The charging current is defined by the external resistor connected to the CCI pin. The voltage of the Li-Ion cell is monitored by the VC pin in order to limit the charge current and regulate the output voltage. When the cell voltage reaches the pre-programmed value, the device switches on the integrated ideal diode and disconnects the battery from CCI. Then the cell will be kept topped up while the trickle charging current is flowing.

Additionally, the LTC4054XES5-4.2#TRMPBF supports an external Over-Voltage protection, which is implemented by an NPN transistor connected to the OVP pin. When the cell voltage reaches the programmed value, the OVP pinloads the transistor\'s Base-Emitter junction, turning on the transistor and shutting down the charger. Moreover, when the die temperature rises above the safe operational range, the thermal regulation circuitry trips, shutting down charging until the temperature drops back below the set threshold. Once the temperature is back in the safe range, the device can continue the charging process.

In conclusion, the LTC4054XES5-4.2#TRMPBF is an advanced power management IC specifically designed for Lithium-ion, Lithium Iron Phosphate, Ni-MH and Ni-Cd batteries. It comes with advanced features such as thermal regulation, input overvoltage protection, automatic trickle charging, full charging status monitoring and LED status indicator which makes it a versatile IC adaptable to a wide range of application needs. The IC maximizes Li-Ion cell efficiency, while keeping cell stress and ripple low, and its embedded full and empty shutdown circuitry prevent the overcharging of the battery allowing the cells to be be kept topped up safely.

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