High-performance class G stereo headphone amplifier with I2C volume control

The TS4621E is a class-G stereo headphone driver dedicated to high audio performance, high power efficiency and space-constrained applications.

It is based on the core technology of a low power dissipation amplifier combined with a high-efficiency buck converter for supplying this amplifier.

When powered by a battery, the buck converter generates the appropriate voltage to the amplifier depending on the amplitude of the audio signal to supply the headsets. It achieves a total 2.1 mA current consumption at 100 μW output power (10 dB crest factor).

THD+N is 0.02% maximum at 1 kHz and PSRR is 100 dB at 217 Hz, which ensures a high audio quality of the device in a wide range of environments.

The traditionally bulky output coupling capacitors can be removed.

A dedicated common-mode sense pin removes parasitic ground noise.

The TS4621E is designed to be used with an output serial resistor. It ensures unconditional stability over a wide range of capacitive loads.

The TS4621E is packaged in a tiny 16-bump flip-chip package with a pitch of 400 μm.

Key Features

  • Power supply range: 2.3 V to 4.8 V
  • 0.6 mA/channel quiescent current
  • 2.1 mA current consumption with 100 μW/channel (10 dB crest factor)
  • 0.006% typical THD+N at 1 kHz
  • 100 dB typical PSRR at 217 Hz
  • 100 dB of SNR A-weighted at G = 0 dB
  • Zero pop and click
  • I2 C interface for volume control
  • Digital volume control range from -60 dB to +4 dB
  • Independent right and left channel shutdown control
  • Integrated high-efficiency buck converter
  • Low software standby current: 5 μA max
  • Output-coupling capacitors removed
  • Thermal shutdown and short-circuit protection
  • Flip-chip package: 1.65 mm x 1.65 mm, 400 μm pitch, 16 bumps



Description バージョン サイズ
DS8644 DS8644: High-performance class-G stereo headphone amplifier with I2C volume control 1.1 1 MB

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ST’s solutions for mobile devices 3.2 2 MB

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サンプル & 購入

製品型番 パッケージ Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * 数量 ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
TS4621EIJT Chip Scale Package 0.4mm pitch Tape And Reel -40 85 Active 0.497 1000 NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

品質 & 信頼性

製品型番 Marketing Status パッケージ Grade RoHS Compliance Grade Material Declaration**
TS4621EIJT アクティブChip Scale Package 0.4mm pitch-Ecopack3 0 0

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.