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LQM2MPN2R2G0L Datasheet(PDF) 1 Page - STMicroelectronics |
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LQM2MPN2R2G0L Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 48 page  September 2011 Doc ID 022194 Rev 2 1/48 48 TS4621B High-performance class-G stereo headphone amplifier with I2C volume control 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 ■ I2C interface for volume control ■ Digital volume control range from -60 dB to +4 dB ■ Independent right and left channel shutdown control ■ Integrated high-efficiency step-down converter ■ Low software standby current: 5 µA max ■ Output-coupling capacitors removed ■ Thermal shutdown ■ Flip-chip package: 1.65 mm x 1.65 mm, 400 µm pitch, 16 bumps Applications ■ Cellular phones, smart phones ■ Mobile internet devices ■ PMP/MP3 players Description The TS4621B 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 step-down DC/DC converter for supplying this amplifier. When powered by a battery, the internal step- down DC/DC 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 TS4621B is designed to be used with an output serial resistor. It ensures unconditional stability over a wide range of capacitive loads. The TS4621B is packaged in a tiny 16-bump flip-chip package with a pitch of 400 µm. TS4621BEIJT - flip-chip Balls are underneath Pinout (top view) AVDD SW INL- C1 CMS SDA AGND C2 HPVDD VOUTL VOUTR INL+ INR+ PVSS SCL INR- 43 2 1 A B C D AVDD SW INL- C1 CMS SDA AGND C2 HPVDD VOUTL VOUTR INL+ INR+ PVSS SCL INR- 43 2 1 A B C D www.st.com |
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