TS4621: Power-Saving Stereo Headphone Amplifier IC
TS4621: the best audio-performance/efficiency trade-off
Description:
The TS4621 is a class G headset amplifier dedicated to high audio performances, high power efficiency and space-constrained applications.
It is based on a low-power amplifier combined with a high-efficiency buck converter to supply this amplifier. When powered by a battery, the buck converter generates the appropriate amplifier voltage depending on the amplitude of the audio signal to the headset. Thus only 2.1 mA current is required at 100 µW output power on each channel.
The THD+N at 1 kHz is typically 0.006 % and the PSRR is 100 dB at 217 Hz. It is packaged in a 16-bump 400 µm pitch flip-chip package.
Features:
- Power supply range: 2.3 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 typical SNR A-weighted at G = 0 dB
- True zero pop and click
- I²C interface for volume control
- Flip-chip package, 16 bumps, 400 µm pitch, 1.65 x 1.65 mm
Applications:
- Cellular phones, smartphones
- Mobile Internet devices
- PMP/MP3 players
Diagram:
Source: STMicroelectronics
April 13th, 2010 11:34
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