LM3420M5X-8.4/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC (Power Management IC) integrates numerous components into one integrated circuit to simplify the design of complex systems with multiple voltage requirements, control, and power management functions, and also provides numerous protection functions. Battery chargers often utilize power management ICs to efficiently and safely provide an appropriate charging voltage, current or trickle charge for lithium-ion batteries or other battery types. Here we look at an example of PMIC – the LM3420M5X-8.4/NOPB battery charger and its application and working principles.

The LM3420M5X-8.4 is an integrated buck switching regulator with comprehensive protection and monitoring features. The LM3420 can provide up to 8.4A of output current for charging and support most battery chemistries, including Li-ion, Li-Pol, LiFePO4 and other battery types. The LM3420 also provides various safety protections, such as UVLO (Under Voltage Lock Out), OCP (Over Current Protection), thermal detection, foldback current limiting and over voltage protection.

In terms of its application, LM3420 can be used in any system with a need for an accurate, reliable and safe battery charger. It is suitable for many consumer electronic applications, such as power banks, mobile phones, tablet PCs, media players, game consoles, and laptop or desktop PCs. Battery powered consumer devices often lack advanced battery charging features and safety features because of space and cost constraints, so in this application the LM3420\'s low cost and small form factor makes it a suitable choice.

The LM3420 has an operating voltage range of 3.3V to 6.5V and can provide up to 8.4A of output current for charging Lithium-Ion batteries. It is also capable of charging other battery chemistries such as Nickel Metal Hydride, Lead Acid, etc. It can also accept input voltage from the USB port and deliver 5V, 150mA of output current. The output voltage can be set using a resistor divider.

In terms of its functioning, the LM3420\'s internal circuitry automatically regulates the voltage and current given to the battery, with the current limited by a sense resistor connected between the FB pin (feedback pin) and the CS pin (current sense pin). The FB pin can be used to monitor the voltage output and provides over-voltage and over-current protection. The CS pin is used to measure the output current, which can be used to regulate the charging current and also to accurately determine the battery charging status.

The LM3420 is equipped with various protections to ensure fast, safe, and reliable charging performance. These include UVLO (Under Voltage Lock Out) to prevent over-discharging the battery, OCP (Over Current Protection), thermal detection, foldback current limiting, and over voltage protection. The LM3420 also has an Overtemperature Shutdown feature, which will automatically shut down when the device\'s temperature reaches a certain level.

The LM3420 also supports I2C control to enable various application specific features. The LM3420 can also be used in parallel to increase output current, allowing for higher current chargers that can quickly charge a wide variety of batteries. This flexibility makes the LM3420 application suitable for a wide range of applications.

In summary, the LM3420M5X-8.4/NOPB is an integrated buck switching regulator with comprehensive protection and monitoring features that makes it a suitable choice for many consumer electronic applications where accuracy and safety are needed. The LM3420 has a wide operating voltage range and can provide up to 8.4A of output current for charging, with many safety and protection features for reliable operation.

The specific data is subject to PDF, and the above content is for reference