LTC4066EUF-1

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The LTC4066EUF-1 device is a high performance battery charger IC, which falls in the category of PMIC – Battery Management. LTC4066EUF-1 has a wide application field due to its over-discharge protection and an integrated safety timer. This device is suitable for single-cell Li-Ion or Li-Polymer battery packs in applications such as digital cameras, phones and other portable equipment. The device is designed to provide high current charging and total protection of the battery from over-charge, over-discharge and over-temperature.

Application Field for LTC4066EUF-1

The LTC4066EUF-1 device has a wide application field due to its many features like over-discharge protection, precision charge current and voltage feedback loop. It can be used for single-cell Li-Ion or Li-Polymer applications that require total battery protection from over-charge, over-discharge and over-temperature conditions. The device is also suitable for application that require high current charging, such as digital cameras and cell phones.

The device has an adjustable charge current that can be programmed using the integrated resistor. The charge current is adjustable from 100mA to 1000mA in 150mA increments. It also has an adjustable charge voltage of 3.6V to 4.2V, which can be programmed using the integrated resistor. The device also features an integrated safety timer to end the charge cycle after a predetermined time. This ensures that the battery is protected from overcharging.

Working Principle of LTC4066EUF-1

The LTC4066EUF-1 device operates in one of three modes: pre-charge, constant-current(CC) and constant-voltage (CV). In pre-charge mode, the device limits the input current to the battery and pre-conditions the battery prior to entering the CC mode. This helps to improve battery life by reducing charging stress on the battery.

In constant-current (CC) mode, the device maintains a constant current flow into the battery, as long as the voltage across the battery is below the pre-programmed charge voltage. The programming resistor allows the user to select a charge current value of up to 1A in 150mA increments. Once the preprogrammed voltage is reached, the device enters into constant-voltage (CV) mode, where the device maintains a constant output voltage across the battery.

The device also features an integrated over-discharge protection circuit which prevents the battery from being over discharged. The circuit monitors the voltage across the battery and if the pre-programmed discharge voltage is reached, it shuts off the battery output, protecting the battery and the device from over-discharge.

The integrated safety timer provides total protection from overcharging, by shutting off the charger after a pre-programmed time. The duration of the timer can be set by the user and can be set up to 16 hours, ensuring that the battery is fully charged and protected from overcharging.

Conclusion

The LTC4066EUF-1 device is a high performance battery charger IC, which falls in the category of PMIC – Battery Management. The device has a wide application field due to its over-discharge protection and an integrated safety timer. It is suitable for single-cell Li-Ion or Li-Polymer battery packs in applications such as digital cameras, phones and other portable equipment. The device features adjustable charge current and voltage, and an integrated safety timer to end the charge cycle after a predetermined time.

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