LM3420M5X-12.6

The LM3420M5X-12.6 is a low-power PMIC (Power Management Integrated Circuit) for battery-powered systems with an integrated battery charger. Developed by Texas Instruments, this single-chip regulated charger has a simple and efficient design that supports lithium-ion and lithium-ion polymer battery chemistries. The LM3420M5X-12.6 provides an integrated solution that simplifies the design of a battery charger system. It is designed to offer a high power density, fast charge time, and a wide input voltage range. The LM3420M5X-12.6 supports multiple charge cycles, advanced features, safety features, and low system cost.

Application Field

The LM3420M5X-12.6 is designed to be used in battery-powered systems requiring a regulated charger, primarily portable consumer electronic devices. It is suitable for applications such as smartphones, tablets, wearables, medical devices, and portable navigation systems. It is also suitable for applications that require a regulated AC or DC power supply, such as automotive, industrial controls, instrumentation, and HVAC systems.

Working Principle

The LM3420M5X-12.6 uses a switch-mode topology to efficiently convert power from an AC or DC source to the battery voltage. The device includes an integrates constant-current/constant-voltage (CC/CV) controller and power FETs, eliminating the need for external components. The LM3420M5X-12.6 is designed to quickly charge lithium-ion and lithium-ion polymer cells, and can handle a wide input voltage range to allow charging from AC wall adapters or automotive DC sources. The device also supports multiple charge cycles, allowing the user to safely charge the battery while it is still in the system.

The LM3420M5X-12.6 can provide up to 2.6A of charging current, making it ideal for faster charging of large batteries. It also features safety features such as over-voltage, over-current, and thermal protection, as well as reverse-polarity protection and short-circuit protection. The device is also able to detect when the battery has reached the full charge, and will automatically turn off the charger.

The LM3420M5X-12.6 is an efficient, simple, and low-cost solution for battery-powered applications. It can be used in a wide range of systems and provides reliable, safe charging for lithium-ion and lithium-ion polymer batteries.