Year: 2026

ATS2805A Datasheet PDF – Wireless Digital Audio Chip

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Part Number:  ATS2805A

Function: Highly integated single-chip Buletooth audio device.

Package: QFPN-56 (7x7mm)

Manufacturer: Actions Semiconductor ( http://www.actions-semi.com )

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ATS2805A image

Description

ACTIONS ATS2805A is a new generation single-chip highly-integrated digital audio solution. It is a low-cost, low-power, high-efficiency digital audio chip which is based on MIPS low power processor architecture with hardware accelerator. It is designed for portable audio product applications such as dedicated audio player, Bluetooth&FM player etc.

The ATS2805 includes an audio decoder with embedded RAM and ROM, ADPCM record capabilities and USB interface for downloading music and uploading voice recordings. ATS2805A also provides an interface to SPI Nor flash memory, SD/MMC card, LED/LCD, button and switch inputs, headphones, and microphone, and FM radio input and control, Bluetooth Player. Its embedded audio codec supports almost all digital audio standards, it can act as a USB mass storage slave device to personal computer system.

The ATS-2805A has low power consumption to allow long battery life, Embedded VCC&VDD LDO and supports Li-on battery only. The built-in Sigma-Delta D/A includes a headphone driver to directly drive low impedance headphone. The A/D includes inputs for both Microphone and Analog Audio in to support voice recording, Bluetooth and FM radio integration features. Thus, it provides a true ’ALL-IN-ONE’ solution that is ideally suited for highly optimized digital audio players.

Features

  • Supports MP3, APE, and FLAC audio decoding
  • Bluetooth stereo music playback through A2DP
  • Bluetooth hands-free operation through HFP
  • Bluetooth wireless control through AVRCP
  • Supports additional Bluetooth control protocols
  • High-quality echo cancellation
  • Noise cancellation algorithms
  • Built-in ADPCM encoder for audio recording
  • High-performance USB interface

Applications

  • Bluetooth speakers
  • Stereo Bluetooth headphones
  • Portable audio players
  • Wireless audio systems
  • USB audio devices
  • USB sound cards
  • Digital voice and audio recorders
  • Portable multimedia equipment
  • SD/MMC audio players
  • Hands-free Bluetooth audio systems
  • Compact consumer electronics

ATS2805A Datasheet

BQ29412 Datasheet PDF – Overvoltage Protection IC

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Part Number: BQ29412

Function: VOLTAGE PROTECTION FOR 2-, 3-, OR 4-CELL Li-Ion BATTERIES

Package: TSSOP, SM8 Type

Manufacturer: Texas Instruments

Pinouts:

BQ29412 datasheet

 

Description

BQ29412 is a secondary overvoltage protection IC designed for 2- to 4-cell lithium-ion battery packs, featuring a fixed 4.45V high-accuracy detection threshold in a compact package. It integrates precise voltage monitoring, programmable delay timing, and strong ripple rejection to ensure stable operation even under pulse charging conditions. This device is commonly used in battery protection circuits for portable electronics and energy storage systems.

Features

  • Fixed high-accuracy overvoltage protection threshold (4.45V per cell)
  • Supports 2-, 3-, and 4-cell lithium-ion battery packs
  • Programmable delay time for overvoltage detection
  • High power supply ripple rejection capability
  • Stable operation during pulse charging conditions
  • Low current consumption for battery-powered systems

• Fixed High Accuracy Overvoltage Protection Threshold
– bq29410 = 4.35 V
– bq29411 = 4.40 V
– bq29412 = 4.45 V
– bq29413 = 4.50 V
– bq29414 = 4.55 V
– bq29415 = 4.60 V
– bq29419 = 4.30 V

• Programmable Delay Time of Detection

• High Power Supply Ripple Rejection

• Stable During Pulse Charge Operation

Block Diagram

components

Design Notes

  • Place the IC close to the battery cells to minimize sensing errors due to trace resistance
  • Select appropriate external delay capacitor to set accurate overvoltage detection timing
  • Ensure proper grounding to improve noise immunity and ripple rejection
  • Consider thermal conditions in tightly packed battery modules
  • Use with primary protection IC for redundant safety architecture

How to Choose This Part

  • Select based on required overvoltage threshold (4.45V per cell for BQ29412)
  • Suitable for designs requiring secondary independent protection
  • Choose when high accuracy and stability under ripple conditions are critical
  • Ideal for multi-cell lithium-ion battery safety applications

Applications

  • Notebook computers
  • Portable instrumentation
  • Battery-powered portable equipment
  • Lithium-ion battery packs

Other data sheets are available within the file:

BQ29410, BQ29410DCT3R, BQ29410DCT3RE6, BQ29410DCTR, BQ29410DCTRG4

 

BQ29412 Datasheet PDF Download


BQ29412 pdf