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Bluetooth Wireless Headphones with Extended Battery Life

Overview

The global market for wireless headphones is experiencing significant growth as consumers increasingly prefer them for their convenience, portability, and improved user experience. This trend drives the demand for products with extended battery life to support longer usage periods without frequent recharging.

This design features a wireless headphone and charging cradle incorporating an ultra-low power 48MHz Arm® Cortex®-M23 MCU, alongside a best-in-class, high-efficiency power system that enables extended battery life.

System Benefits:

  • Advanced security, connectivity, and flexible software
  • Integrated analog front-end (AFE) reduces BOM costs and PCB size by eliminating several analog components
  • Compact design for space-limited applications
  • Highly efficient low quiescent current power system with voltage supervisors and buck regulators extends battery life

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4:3 ratioConnector Line.195Connector Line.188Sheet.1Sheet.2Sheet.3Sheet.4JP034JP034JP034 I2CI2CI2C I2CI2CI2CBattery.27Sheet.16Sheet.17Sheet.18MicrophoneSheet.21Sheet.22Speakerspeaker_8_Sheet.28Sheet.29Sheet.30Sheet.31Speaker.32speaker_8_Sheet.34Sheet.35Sheet.36Sheet.37Wireless Power TransmitterWireless Power TransmitterWireless Power TransmitterWireless Power ReceiverWireless Power ReceiverWireless Power ReceiverBattery ChargerBattery ChargerBattery ChargerBuck-Boost RegulatorBuck-Boost RegulatorBuck-Boost RegulatorVoltage SupervisorVoltage SupervisorVoltage SupervisorLEDLEDLEDVoice RecognitionVoice RecognitionVoice RecognitionMCU 2MCUMCUDSP MMCDSP MMCDSP MMCMemory RAMMemory RAMMemory RAMVBATVBATVBATLithium BatteryLithium BatteryLithium BatteryENENEN3.3V3.3V3.3V SPISPISPIBluetooth LogoSheet.100BluetoothSheet.102Sheet.103Sheet.104Sheet.105Sheet.106Sheet.107Sheet.108Sheet.109Sheet.110Sheet.111Bug_1_Sheet.113BugAntennaSheet.135Sheet.136Sheet.137Sheet.138Sheet.139Touch ButtonTouch ButtonTouch ButtonTouch ButtonTouch KeySheet.174Sheet.175Sheet.176Sheet.177Sheet.178Sheet.179Sheet.180Sheet.181Sheet.182Connector ArrowConnector Arrow.190Connector Arrow.191Connector Arrow.192Connector Line.198Connector Arrow.199Connector Arrow.200Connector Arrow.201Connector double arrowConnector Arrow.204Connector Arrow.206Connector double arrow.207Connector double arrow.209Connector Arrow.211Connector Arrow.212Connector Line.213Connector Arrow.214Microphone.215Sheet.216Sheet.217Connector Arrow.218TransmitterTransmitterTransmitterCharging CradleCharging CradleCharging CradleConnector Line.224Wireless HeadphoneWireless HeadphoneWireless HeadphoneConnector Arrow.227Connector Line.228Sheet.229Sheet.230Inductor Coreless (Air conductor)Sheet.60Sheet.61Sheet.62Sheet.63Sheet.64Sheet.65Sheet.66Sheet.67Sheet.68Connector LineConnector Line.185Sheet.231Inductor Coreless (Air conductor).69Sheet.70Sheet.71Sheet.72Sheet.73Sheet.74Sheet.75Sheet.76Sheet.77Sheet.78Connector Line.187Sheet.223MCUMCU 1MCUMCUDACDACDACI2CI2CI2CI2CI2CI2CUSB-FSUSB-FSUSB-FSGPIOGPIOGPIOSPISPISPISPISPISPICTSU (26ch)CTSU (26ch)CTSU(26ch)DACDACDAC

Battery Charger

Voltage Supervisor

Voltage Supervisor & Reset ICs

Buck-Boost Regulator

Buck-boost Regulators (Integrated FETs)

MCU

RA Arm Cortex-M MCUs

MCU

RL78 Low-Power 8 & 16-Bit MCUs

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