BQ2057TSNG4

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The BQ2057TSNG4 is an industrial battery charger integrated circuit suitable for use in a variety of applications. The device is capable of providing up to 6A of charge current while providing a wide operating temperature range of -40°C to +85°C and low levels of power dissipation. The device implements a three-stage charge algorithm which provides for constant current and constant voltage charging of a variety of battery chemistries. Additionally, there are numerous protection features to ensure safe and reliable operation.

The BQ2057TSNG4 is designed to charge a single Li-Ion or Li-Polymer battery, and can charge multiple batteries in parallel when connected in a “Master-Slave” configuration. The device supports up to 5 terminals and allows for even distribution of charge current among all connected batteries. The device can also enable/disable charging, balance charge and discharge currents, and detect any abnormality in the battery, among other features.

The BQ2057TSNG4 is capable of providing up to 6A of charge current and includes a linear charge regulator and a step-down regulator with a wide input voltage range of 4.5V to 24V. A charge indicator signal output is available to indicate the status of each battery, as well as an undervoltage lockout (UVLO) input to indicate when charging should be disabled. Additionally, there is a pin to enable/disable charging, a pin to control the low temperature cutback and a pin to enable/disable the charge balance function.

The working of the BQ2057TSNG4 relies on the three-stage charge algorithm which consists of pre-charge (trickle charge), constant current and constant voltage stages. In the first pre-charge stage, a very low current is applied to the battery in order to slowly charge the cells. This prevents any thermal runaway due to overcharging and prepares the cells for the subsequent high currents that will be applied during the constant current stage.

In the constant current stage, the device will monitor the battery’s voltage and apply a variable current to charge it. The current will be increased until a preset level is reached, at which point the device will move to the constant voltage stage. The constant voltage stage is used to terminate the battery charging process, and the maximum voltage is adjusted based on the battery chemistry. Once the voltage reaches the predetermined level, the device holds the voltage and reduces the current to a trickle charge ensure that the battery does not become overcharged.

BQ2057TSNG4 is a versatile and reliable IC suitable for a wide range of applications including notebook computers, electric vehicles, solar energy systems and industrial equipment. The device is designed to be robust and offers multiple features that ensure reliable and safe operation. With its wide input voltage range and 6A of charge current, the BQ2057TSNG4 is an ideal solution for high-current battery charging applications.

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