UC2909DWTRG4

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UC2909DWTRG4 is a power management integrated circuit (PMIC) - battery charger specifically designed for Lithium-Ion (Li-Ion) and Lithium-Polymer (Li-Poly) battery packs. The device is suitable for a variety of battery charging and maintenance applications, such as portable and renewable power systems, consumer electronic products, automotive, medical and industrial applications. The UC2909DWTRG4 offers a robust charge control solution with advanced safety features, accurate charge status information, and flexible I/O.

Features

The UC2909DWTRG4 features an internal 5.5V to 45V buck converter, a 3-bit analog multiplier, an adjustable top-off timer, and a 3-state charging current regulation. It also includes an under-voltage lockout (UVLO) for charging batteries safely. The UC2909DWTRG4 also offers over-voltage protection (OVP) and short-circuit protection (SCP) for enhanced safety. The device includes a temperature monitoring feature to ensure temperature safe charging. The UC2909DWTRG4 is RoHS compliant.

Function

The UC2909DWTRG4 is a power management IC specifically designed to charge Li-Ion and Li-Polymer battery packs. The device offers a robust charge control solution with advanced safety features, accurate charge status information, and flexible I/O connections. The integrated 5.5V-45V buck converter, analog multiplier, adjustable top-off timer, and current control are all designed to ensure total battery charging and maintenance is managed effectively and safely. The UVLO and OVP features protect against over- and under-volting, while the SCP feature helps to detect and respond to short-circuit conditions.

The UC2909DWTRG4 also includes a temperature monitor feature to validate the battery temperature before and during charging to ensure safe operations. The adjustable top-off timer ensures that a safety cut-off time is established and the battery fully charged. In addition, the 3-bit analog multiplier allows for adjustable voltage and current regulation for application tuning.

Applications

The UC2909DWTRG4 is suitable for LI-Ion and Li-Polymer battery charging and maintenance applications, such as portable and renewable power systems, consumer electronic products, automotive, medical and industrial applications, and battery-powered equipment. The device is particularly well-suited for charging multiple battery packs in parallel, and can be used to balance the charges across multiple packs simultaneously. The UC2909DWTRG4 is also an ideal choice for battery powered devices, ensuring the safe and efficient charging of lithium-based battery packs.

Working Principle

The UC2909DWTRG4 works by first determining the voltage and current draw of the connected battery pack and then supplying the appropriate charging current. The UVLO feature protects the battery pack from over- and under-voltage, while the SCP feature detects and responds to short-circuit conditions. The internal 5.5V-45V buck converter and analog multiplier are used to adjust the voltage and current regulation for application tuning. The temperature monitor feature ensures the battery temperature is monitored before, during and after charging. The adjustable top-off timer ensures the battery is fully charged in a predetermined time and then ceases charging. This ensures that the battery is charged safely and efficiently.

Conclusion

The UC2909DWTRG4 is a PMIC - Battery Chargers specifically designed for Li-Ion and Li-Polymer battery packs. The integrated 5.5V to 45V buck converter and 3-bit analog multiplier allow for adjustable voltage and current regulation for application tuning. The temperature monitor feature ensures the battery temperature is safe during charging, and the adjustable top-off timer ensures the battery is fully charged in a predetermined time and then ceases charging. The device offers a robust charge control solution with advanced safety features, accurate charge status information, and flexible I/O connections. It is suitable for a variety of battery charging and maintenance applications, such as portable and renewable power systems, consumer electronic products, automotive, medical and industrial applications.

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