LM3420M5X-4.2

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The LM3420M5X-4.2 PMIC is a high-performance, battery-charging integrated circuit. It is designed to provide a simple, reliable, and accurate battery-charging power supply for a wide variety of applications. The LM3420M5X-4.2 is capable of charging multiple batteries in parallel, allowing for more efficient and reliable charging.

Application field: This PMIC can be used in a variety of applications, including laptop computers, cell phones, tablets, and other portable electronic devices. It can also be used in automotive, industrial, and medical applications. The LM3420M5X-4.2 PMIC is an ideal solution for batteries ranging from 3.0V to 4.2V.

Working Principle: The LM3420M5X-4.2 PMIC is based on a proprietary switch-mode charging algorithm. This algorithm is designed to increase efficiency and reduce thermal dissipation for improved battery life. The circuit is composed of a battery charger, power source, input sources, and control circuitry. The main components of the charging circuit include a step-up conversion converter, a switching regulator, a low-dropout linear regulator, and a voltage-controlled switch.

The step-up conversion converter provides a high-efficiency charging path by efficiently boosting the voltage from a low-voltage battery to a higher voltage. The switching regulator and low-dropout linear regulator provide power-conversion stability. The voltage-controlled switch adjusts the output voltage based on the battery’s voltage and temperature conditions. This is the core of the charging algorithm used by the LM3420M5X-4.2 PMIC.

To ensure accurate and efficient charging, the LM3420M5X-4.2 PMIC supports input current-limit protection, input under-voltage protection, input waveform shaping, and ADC-controlled output voltage-limit voltage detection. An additional charge-termination circuit is also included for a more controlled charging process.

The LM3420M5X-4.2 PMIC is designed to rapidly charge and condition a single cell Li-Ion or Li-Polymer battery. The PMIC provides a wide operating voltage range from 3.0V to 4.2V and is capable of delivering up to 1A of current. The PMIC also supports a variety of charging modes including constant current, constant voltage, and trickle charging.

In conclusion, the LM3420M5X-4.2 PMIC is a high-performance battery-charging integrated circuit. It is designed to provide a simple, reliable, and accurate battery-charging power supply for a wide variety of applications. Its advanced switch-mode charging algorithm ensures efficient and accurate charging while its wide operating voltage range eliminates the need for multiple charging solutions. Furthermore, the circuit is composed of an efficient power-conversion system, a voltage-controlled switch, and a ADC-controlled charge-termination circuit. As a result, the LM3420M5X-4.2 PMIC is an ideal solution for a variety of battery-charging applications.

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