MC9S08QB8
Freescale Semiconductor
Freescale very low-power MC9S08QB8 microcontroller. This device provides the full set of the peripherals required for the control of this application.
Application NoteNxp
Low-Power Wireless Charging Receiver using the Freescale MC9S08QB8 MCU
Design guide for building a low-power wireless charging receiver and battery charger using Freescale MC9S08QB8 or KL05 MCUs with Qi specification support.
Overview
This application note describes how to implement a wireless power receiver and battery charger using the MC9S08QB8 microcontroller. The design focuses on high efficiency and low internal power loss, supporting the Qi wireless charging specification. Key hardware components include an input power coil, bridge rectifier, DC-DC buck converter for battery management, and an analog modulator for communication with the transmitter. The MCU utilizes its ADC for monitoring rectified voltage and current, PWM for buck converter control, and GPIOs for status signaling. The document also highlights foreign object detection (FOD) capabilities and notes that Kinetis KL05 sub-family devices are suitable alternatives.
Use Cases
- Mobile phone wireless charging
- Tablet battery charging
- Battery-powered hand tools
- Consumer electronics power management
- Qi-compliant wireless power receivers
Topics
wireless charging
Qi specification
MC9S08QB8
KL05
battery charger
DC-DC buck converter
foreign object detection
amplitude modulation
receiver design
low-power MCU
Referenced Parts
KL05
Freescale Semiconductor
The Kinetis, KL05 sub-family of devices can also be used in this application with comparable power consumption parameters.
| MC9S08QB8 | Freescale Semiconductor | Freescale very low-power MC9S08QB8 microcontroller. This device provides the full set of the peripherals required for the control of this application. |
| KL05 | Freescale Semiconductor | The Kinetis, KL05 sub-family of devices can also be used in this application with comparable power consumption parameters. |