LT1513CR#TRPBF

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The LT1513CR#TRPBF is a linear, constant-current, constant-voltage battery charger controller. It is an integrated, monolithic circuit that provides the accurate control required to quickly and safely charge the battery from any supply, such as from the ac line or from a solar panel. An external PNP transistor provides the current path to the battery. The charger is designed to operate both in float and trickle modes for sealed, maintenance-free lead-acid and lead-calcium batteries.

Applications

The LT1513CR#TRPBF is ideal for use in a variety of applications such as, residential/commercial uninterruptible power supply (UPS) with multiple battery charging sources, remote applications powered off grid, DC power supply with multiple battery charging sources, and industrial control systems.

The LT1513CR#TRPBF has been designed to provide greater control of the charging process which allows it to be used in applications that require a low quiescent current, high efficient charging operation and pin selectable features.

The LT1513CR#TRPBF is suitable for a wide range of single cell lead-acid and lead-calcium batteries including sealed, maintenance free, and flooded sealed batteries.

Function and Operation

The LT1513CR#TRPBF is an integrated linear power controller for battery charging applications. The charger controller integrates both constant voltage and constant current control. It uses an external series PNP transistor to regulate the output voltage and current to the battery. The battery charging process can be controlled to meet the needs of the user. The charger controller operates in both float and trickle charging modes.

Float Mode: In this mode, the battery is held at a constant voltage. The current is regulated by the controller so that the battery is not overcharged. The battery voltage is monitored internally and is regulated by the controller to maintain the float voltage. The charging current is held constant at the preset level, regardless of the battery voltage.

Trickle Mode: In this mode, the battery is charged at a lower current than in float mode. The current is regulated by the controller so that the battery is not overcharged. The battery voltage is monitored internally and is regulated by the controller to maintain a low level of charge. The charging current is held constant at the preset level, regardless of the battery voltage.

The LT1513CR#TRPBF is designed to operate with a wide range of input voltages, from 6.0V to 18V. The output voltage can be adjusted to meet the requirements of the battery. The output current can be adjusted to the maximum level that is safe for the battery.

The LT1513CR#TRPBF includes a Status Signal Output (SSO) pin to indicate the completion of the charging process. The SSO pin is an open-drain output that is used to indicate when the charger has reached the desired float or trickle voltage. The SSO pin also has a delay to prevent false triggering due to line transient or load transients.

Conclusion

The LT1513CR#TRPBF is an integrated linear controller for battery charging applications. The device is designed to provide accurate control to quickly and safely charge the battery from any supply. It is particularly suitable for use in applications such as residential/commercial UPS projects, remote applications powered off-grid, and industrial control systems. The LT1513CR#TRPBF provides both constant voltage and constant current charging control along with high efficiency operation. The device also includes a status signal output to indicate the completion of the charging process.

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