TS4621EIJT STMicroelectronics

TS4621E High-performance class-G stereo headphone amplifier 2 with I C volume control Features TS4621EIJT - flip-chip Power supply range: 2.3 V to 4.8 V 0.6 mA/channel quiescent current 2.1 mA current consumption with 100 W/channel (10 dB crest factor) 0.006% typical THD+N at 1 kHz Pinout (top view) 100 dB typical PSRR at 217 Hz INRINR-- VOVOUTUTRR SCSCLL SDASDA DD 100 dB of SNR A-weighted at G = 0 dB Zero pop and click ININR+R+ C2C2 CMCMSS PVSSPVSS CC 2 I C interface for volume control ININL+L+ HPHPVDVDDD C1C1 AGAGNNDD BB Digital volume control range from -60 dB to +4 dB ININL-L- VOVOUTUTLL AVAVDDDD SWSW AA Independent right and left channel shutdown 4343 22 11 control Integrated high-efficiency buck converter Balls are underneath Low software standby current: 5 A max When powered by a battery, the buck converter Output-coupling capacitors removed generates the appropriate voltage to the amplifier Thermal shutdown and short-circuit protection depending on the amplitude of the audio signal to Flip-chip package: 1.65 mm x 1.65 mm, supply the headsets. It achieves a total 2.1 mA 400 m pitch, 16 bumps current consumption at 100 W output power (10 dB crest factor). Applications THD+N is 0.02% maximum at 1 kHz and PSRR is 100 dB at 217 Hz, which ensures a high audio Cellular phones, smart phones quality of the device in a wide range of Mobile internet devices environments. PMP/MP3 players The traditionally bulky output coupling capacitors can be removed. Description A dedicated common-mode sense pin removes parasitic ground noise. The TS4621E is a class-G stereo headphone driver dedicated to high audio performance, high The TS4621E is designed to be used with an power efficiency and space-constrained output serial resistor. It ensures unconditional applications. stability over a wide range of capacitive loads. It is based on the core technology of a low power The TS4621E is packaged in a tiny 16-bump dissipation amplifier combined with a high- flip-chip package with a pitch of 400 m. efficiency buck converter for supplying this amplifier. September 2011 Doc ID 022201 Rev 1 1/32 www.st.com 32Contents TS4621E Contents 1 Absolute maximum ratings and operating conditions . 3 2 Typical application schematics 5 3 Electrical characteristics . 7 4 Application information . 22 2 4.1 I C bus interface 22 4.1.1 IC bus operation 22 4.1.2 Control register CR2 - address 2 24 4.1.3 Control register CR1 - address 1 25 4.2 Wake-up and standby time definition 26 4.3 Common mode sense . 27 5 Package information 28 6 Ordering information . 30 7 Revision history . 31 2/32 Doc ID 022201 Rev 1