The PCA9420 are highly integrated power management IC, targeted to provide power management solution for low-power microcontroller applications or other similar applications powered by Li-ion battery and/or 5 V adapter non-portable applications.
These devices integrate 2x buck converters, 2x LDOs with programmable output voltage range. PCA9420 also integrates a linear battery charger capable of charging up to 315 mA current with I²C programmable constant current (CC) and constant voltage (CV) values.
This demo application provides a command line interface which allows the user to easily explore the different functions of the driver to configure different device configurations of PCA9420UK-EVM.
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Linear battery charger for charging single cell li-ion battery:
- 20 V tolerance on VIN pin
- Programmable input OVP (5.5 V or 6 V)
- Programmable constant current (up to 315 mA) and pre-charge low voltage current threshold
- Programmable constant voltage regulation
- Programmable automatic recharge voltage and termination current threshold
- Built-in protection features such as input OVP, battery SCP, thermal protection
- Over-temperature protection
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Two step-down DC-DC converters
- Programmable output voltage
- SW1: core buck converter, 0.5 V to 1.5 V output, 25 mV/step, and a fixed 1.8 V, up to 250 mA
- SW2: system buck converter, 1.5 V to 2.1 V/2.7 V to 3.3 V output, 25 mV/step, up to 500 mA
- Low-power mode for extra power saving
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Two LDOs
- Programmable output voltage regulation
- LDO1: always-on LDO, 1.70 V to 1.90 V output, 25 mV/step, up to 1 mA
- LDO2: system LDO, 1.5 V to 2.1 V/2.7 V to 3.3 V output, 25 mV/step, up to 250 mA
- IoT Sensing SDK (ISSDK) v1.8 offered as middleware in MCUXpresso SDK for supported platforms
- MCUXpresso IDE v11.9.0
- FRDM-MCXN947 and FRDM-MCXA153 MCU board
- PCA9420UK-EVM
- 1-cell rechargeable lithium ion battery
- Personal Computer
- Mini/micro C USB cable
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Hardware rework: PCA9420UK-EVM has disabled all connecting lines to Arduino (all header lines are the DNP lines). In order to enable the function, Jumpers of interest must be populated.
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Jumpers populated and connection details to run this application.
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PCA9420UK-EVM PMIC board default jumper setting to test the application.
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User needs to make the connection between shield board (PCA9420UK-EVM) and Base boards (MCXA153 & MCXN947) using jumper wires.
- Install MCUXpresso IDE 11.9.0
- Download and Install MCUXpresso SDK v2.14.0 for FRDM-MCXN947. Make sure to select ISSDK middleware while building SDK.
- Download and Install MCUXpresso SDK v2.14.2 for FRDM-MCXA153. Make sure to select ISSDK middleware while building SDK.
- Install Git v2.39.0 (for cloning and running west commands).
- Install Putty/Teraterm for UART.
- Clone this repository to get the example projects:
- Change directory to cloned project folder:
cd dm-pca9420uk-evm-pmic-for-low-power-application
Note: If you are using Windows to clone the project, then please configure filename length limit using below command
git config --system core.longpaths true
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Open MCUXpresso IDE and select a directory to create your workspace.
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Install MCXUpresso SDK 2.14.x for FRDM-MCX947, FRDM-MCXA153 (drag and drop SDK zip into "Installed SDK" view) into MCUXpresso IDE.
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Go to "Quickstart Panel" and click on "Import Project(s) from file system",
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Select "Project directory (unpacked)" and browse to the cloned project folder.
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To build demo application for PCA9421UK-EVM, Enable PCA9421UK_EVM_EN flag in frdm_pca9420uk_shield.h file under board directory.
PCA9421UK_EVM_EN = 1, for PCA9421UK-EVM shield board PCA9421UK_EVM_EN = 0, for PCA9420UK-EVM shield board
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Right click on project and select build to start building the project.
Note: By default I2C Controller operates in interrupt mode, to switch into EDMA mode Change:
- Change RTE_I2C2_DMA_EN to 1 under board/RTE_Device.h for I2C
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User need to check COM port after connecting USB cable between Host PC and Target Board via device manager.
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Open PUTTY/Teraterm application installed on your Windows PC with Baudrate 115200 and assigned COM port as mentioned in above step.
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After right click on project and select "Debug As", Demo application will run in interactive mode. When the demo runs successfully, you can see the logs printed on the terminal.
Main Menu will look like this
Choose options #1 to Get the Device Information
Choose option #2 to check "PMIC Status"
PMIC status will contain the mode information in which the device is currently operating and its corresponding voltage regulators output voltage configurations.
Choose option #3 to check "Regulator Status"
Regulator status will display the power-good status of voltage regulators.
Choose option #4 to check "Interrupt Status"
To check the status of different types of interrrupt like:
1) System level interrupt
2) Linear battery charger block interrupt
3) Voltage regulator interrupt
As shown above, currently there is no interrupt occurred.
Choose option #5 to configure "Device Specific Settings"
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Some key configurations examples are given below:
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Press #1 to configure VIN input current limit.
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Press #9 to change the mode for device to operate in.
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Press #12 to reset the PMIC device.
NOTE: Refer above logs to configure other device settings.
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Choose option #6 to configure "Battery Charging Settings"
It provides two sub-options:
1) Charge control: To configure settings required for battery charging.
2) Charge status: To check battery, battery charging and the charger status.
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Press #1 to configure charging parameters.
User can configure the charging current and charging timer for different charging profiles listed below: 1) Dead battery mode 2) Low-Voltage mode 3) Fast Charge mode 4) Top-OFF mode 5) Charging Done mode 6) Recharge mode-
Press #3 to configure pre-charge/low battery charge current.
NOTE: Refer above logs to configure other charging parameters.
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Press #2 to check the charging status.
PCA9420UK-EVM can be a linear battery charger for charging of 1-cell rechargeable lithium ion battery. Battery can be connected on TP5 (VBAT point).
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Charge detail status when 1-cell lithium ion battery is not connected.
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Charge detail status on connecting 1-cell rechargeable lithium ion battery on VBAT point.
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Choose option #7 to configure "Voltage Regulator Group Settings"
PCA9420UK-EVM board has 4 voltage regulators:
1) SW1 Buck regulator
2) SW2 Buck regulator
3) LDO1
4) LDO2
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Press #1 to #4 to select specific mode
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After entering specific mode, PCA9420 provides various voltage regulator configurations.
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Press #5 to configure the SW1 buck regulator output voltage.
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Similarly other voltage regulators output can be configured. Shipmode enable/disable, watchdog timer enable/disable and ON pin configurations can also be done.
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NOTE: For mode selection via MODESEL0 and MODESEL1 external line, configure jumper J7 and J9 on the board.
Choose option #8 to "Enable/Disbale Interrupts"
PCA9420UK-EVM has 3 type of interrupt:
1) System level interrupt
2) Linear Battery charger block interrupt
3) Voltage regulator interrupt
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Press #1 for System level interrupt configurations
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By default all the interrupts are disabled, so enabled die-temperature pre-warning interrupt.
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Similarly any other interrupt can be enabled or disabled.
No FAQs have been identified for this project.
Questions regarding the content/correctness of this example can be entered as Issues within this GitHub repository.
Warning: For more general technical questions regarding NXP Microcontrollers and the difference in expected functionality, enter your questions on the NXP Community Forum
| Version | Description / Update | Date |
|---|---|---|
| 1.0 | Initial release on Application Code Hub | December 17th 2024 |