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TWS earbud Charging Case MCU

16/02/2024

New highly integrated TWS earbud charging case Flash MCU, the HT45F2440. With a high input voltage of up to 24V and a charging current of up to 1A, the linear charger management system can be used to prevent the charging case from damage when the USB-C interface is connected to an abnormal voltage and also to shorten the charging time when the voltage is normal. The integrated low-power synchronous boost converter, which has a low 5µA standby current, provides power to the earbuds and extends the TWS earbud usage time.

The device contains a 4K×16 Flash Program Memory, a 256×8 RAM and a 128×8 EEPROM. With regards to peripheral features, the device also includes several multi-function timer modules, a 6-channel 12-bit A/D converter, a reference voltage source with a tolerance of ±1% as well as an IC temperature measurement function.

Main Features

CPU Features:

  • Operating Voltage

- fSYS =8MHz: 1.8V~5.5V
- fSYS =12MHz: 2.7V~5.5V
- fSYS =16MHz: 3.3V~5.5V

  • Up to 0.25μs instruction cycle with 16MHz system clock at VDD =5V
  • Power down and wake-up functions to reduce power consumption
  • Oscillator types

- External High Speed Crystal – HXT
- Internal High Speed 8/12/16MHz RC – HIRC
- External Low Speed 32.768kHz Crystal – LXT

  • Internal Low Speed 32kHz RC – LIRC
  • Multi-mode operation: FAST, SLOW, IDLE and SLEEP

Peripheral Features:

  • Flash Program Memory: 4K×16
  • RAM Data Memory: 256×8
  • True EEPROM Memory: 128×8
  • Watchdog Timer function
  • In Application Programming – IAP
Documents Tech question
Holtek HT45 F2440 earbud charger

TWS earbud Charging Case MCU

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Holtek

Holtek Semiconductor is a leading professional IC design house in Taiwan having its major business activities focused in the area of microcontroller and peripheral component design.

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Documents

  • Holtek HT45 F2440v100 TWS earbud
Pexels thisisengineering 3913017

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