AXP223 PMIC

AXP223 Introduction

The AXP223 is a power management IC (PMIC) that is made to be used in mobile devices like smartphones and tablets. It is made by X-Power, a top semiconductor company focusing on power management solutions.

In this full guide to the AXP223, we’ll look at its features and specifications, how it can be used,, and its benefits.

AXP223 Description

AXP223 is a highly integrated power system management IC for single-cell Li-batteries and DC-DC converters with more than one output. It offers an easy-to-use and flexible, complete solution that can fully meet the increasing complexity of accurate power control needed by modern application processor systems.

AXP223 has a flash charger that works with USB 3.0 and can charge up to 2.1A at up to 94% efficiency; it Supports power output in 21 ways It has five high-current DC-DC converters that work well (up to 95%). Includes multi-channel 12-Bit ADC and monitoring of voltage, current, and temperature; To make sure that the power system is safe and stable, the AXP223 has built-in a number of protection circuits, such as Over voltage protection (OVP)/Under voltage protection (UVP), Over temperature protection (OTP), and current protection (OCP). The Particular E-GaugeTM fuel gauge system speeds up the testing of battery parameters and ensures the measurements are accurate.

The quick interface of the AXP223 lets the system change the output voltage on the fly and talk to the application processor. This lets the system use a variety of conversion modes and get the most out of the battery life. IPS TM circuit can distribute electricity safely and transparently between the USB, external AC adapter, lithium battery, and application system load. It also lets the application system work when only external power comes in, but the battery is dead or damaged. AXP223 comes in a 68-pin QFN package that is 8mm x 8mm x 0.75 mm.

Applications

The AXP223 is mostly made for use in smartphones and tablets. It can manage the power needs of different subsystems, including the processor, display, memory, and peripherals.

One of the most important uses of the AXP223 is to manage batteries. It has a full set of charging and monitoring functions for the battery, making it safe and easy to charge. It also has protections for the battery that stop it from being overcharged, over-discharged, or getting too much current.

The AXP223 also controls the power of the processor and other subsystems. It has multiple DC-DC converters and LDOs that convert power from one voltage level to another in a high-efficiency way. This makes the best use of the power and makes the mobile device’s battery last longer.

Advantages

The AXP223 is better than traditional PMIC solutions in a number of ways. Some of the most important benefits are:

• High efficiency: The AXP223 has multiple DC-DC converters that can be as efficient as 95%. This lets the most powerful be used, and the battery last longer.
• Comprehensive protection: The AXP223 has several safety features that ensure it works safely and reliably. These include protection from overcurrent and overvoltage, battery protection, and heat protection.
• The configuration that can be changed: The AXP223 can be changed in many ways and can be set up in different ways to meet the power needs of different mobile devices.
• Automatic power source selection: The AXP223 has automatic power source selection, which makes it easy to switch between different power sources like USB and battery.

Detailed Description

● Adaptive Flash Charger

AXP223 has an adaptive Flash charger that controls the charge cycle automatically. It also has a built-in safety clock that can stop the charge automatically without the processor doing anything. This charger can automatically adjust the charge current based on how much power the system needs. It can also find the battery, charge it slowly, and turn it on. Also, the built-in temperature detection circuit can automatically lower the charge current when the temperature is too high or too low.

● Adaptive Charge Startup

“Enable” is the charger’s normal state. (Registers let you tell it what to do. When an outside power source is plugged in, AXP223 will check to see if it can be charged. If the charger can handle the power and the charge function works, the AXP223 will start charging automatically and send an IRQ to the host to let it know. At the same time, the GHGLED pin will send out a low level to drive an external LED that shows the state of charging.

● Charge Process

The charger will automatically enter a pre-charge mode with a charge current of 10% of the programmed value if the battery voltage is below 3.0V. After 40 minutes (customizable, see “REG34H”), the charger will switch to battery activation mode if the voltage is below 3.0V. A charge cycle completes when the charge current falls to 10% or 15%. After the AXP223 releases IRQ13, the charging status indicator on the CHGLED pin will go dark. Automatic charging will resume, and IRQ12 will become available once the battery voltage dips below VRCH.

● Battery Activate Mode

When the timer for the pre-charge mode or the constant current mod runs out, the battery activation mode is entered, and AXP223 releases IRQ10 to signal that the battery may be harmed. The charger always supplies a small amount of current when the batteries are activated. Only when the battery voltage reaches VRCH will AXP223 leave activation mode and release IRQ11. If the charger is in battery activation mode, AXP223 will show you.

● Voltage-Limit/Current Mode and Direct mode

By default, VBUS always works in Voltage-Limit mode so that it doesn’t mess up how USB devices talk. In this mode, the AXP223 ensures that the voltage on VBUS stays above a reference voltage VHOLD that can be set up to meet the USB specification. Reg30H[5:3] can change the default value of VHOLD, which is 4.4V. If the system has a limit on how much current it can get from USB VBUS, it has a current-limit mode that lets you choose between 900mA, 500mA, and 100mA (Reg30H [0]).

If the system only uses USB for power and not for communication, or if a USB power adapter is used, the register REG30H[6] can be changed to set AXP223 to “VBUS Direct Mode.” Then, AXP223 will give priority to the application’s power demand. When the USB Host’s ability to drive isn’t enough, or the system uses a lot of power, the VBUS voltage is lower than VHOLD. When this happens, the AXP223 will send out an IRQ to inform the Host software that the Host VBUS has a weak power supply, which could interfere with USB communication.

Conclusion

The AXP223 is a PMIC that can be used in mobile devices like smartphones and tablets. It is very efficient and can be changed to fit different needs. It has multiple DC-DC converters and LDOs, functions for charging and monitoring the battery, and many protection features that ensure it works safely and reliably. The AXP223 is a great way to manage power in modern mobile devices because it is very efficient, can be set up in many different ways, and automatically chooses the best power source.

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