TS4621MEIJT STMicroelectronics

TS4621ML High-performance class-G stereo headphone amplifier Datasheet production data Features TS4621MLEIJT - 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 100 dB typical PSRR at 217 Hz 100 dB of SNR A-weighted at G = 0 dB Pinout (top view) Zeropop and clic Gain settings : 0 dB and 6 dB TOP VIEW Integrated high efficiency step-down converter GAIN EN D INR- VOUTR Low standby current: 5 A max INR+ CMS PVSS C2 C Output-coupling capacitors removed INL+ HPVDD C1 AGND B Thermal shutdown Flip-chip package: 1.65 mm x 1.65 mm, INL- VOUTL AVDD SW A 400 m pitch, 16 bumps 432 1 Balls are underneath Applications amplitude of the audio signal to supply the Cellular phones, smartphones headsets. It achieves a total 2.1 mA current Mobile internet devices consumption at 100 W output power (10 dB PMP/MP3 players crest factor). Portable CD/DVD players THD+N is 0.02 % maximum at 1 kHz and PSRR is 100 dB at 217 Hz, which ensures a high audio Description quality of the device in a wide range of environments. The TS4621ML is a class-G stereo headphone The traditionally bulky output coupling capacitors driver dedicated to high-performance audio, high- can be removed. power efficiency and space-constrained applications. A dedicated common-mode sense pin removes parasitic ground noise. It is based on the core technology of a low power dissipation amplifier combined with a high- The TS4621ML is designed to be used with an efficiency step-down DC/DC converter for output serial resistor. It ensures unconditional supplying this amplifier. stability over a wide range of capacitive loads. When powered by a battery, the internal step- The TS4621ML is packaged in a tiny 16-bump down DC/DC converter generates the appropriate flip-chip package with a pitch of 400 m. voltage to the amplifier depending on the May 2012 Doc ID 023181 Rev 1 1/40 This is information on a product in full production. www.st.com 40Contents TS4621ML Contents 1 Absolute maximum ratings and operating conditions . 5 2 Typical application schematic . 7 3 Electrical characteristics . 9 4 Application information . 25 4.1 Gain control . 25 4.2 Overview of the class-G, 2-level headphone amplifier . 25 4.3 External component selection . 27 4.3.1 Step-down inductor selection (L1) . 27 4.3.2 Step-down output capacitor selection (C ) . 27 t 4.3.3 Full capacitive inverter capacitors selection (C12 and C ) . 28 SS 4.3.4 Power supply decoupling capacitor selection (Cs) . 28 4.3.5 Input coupling capacitor selection (C ) . 28 in 4.3.6 Low-pass output filter (R and C ) and out out IEC 61000-4-2 ESD protection . 29 4.3.7 Integrated input low-pass filter 30 4.4 Single-ended input configuration . 30 4.4.1 Layout recommendations for single-ended operation 32 4.5 Startup phase 34 4.5.1 Auto zero technology . 34 4.5.2 Input impedance 34 4.6 Layout recommendations . 34 4.6.1 Common-mode sense layout . 35 5 Package information 36 6 Ordering information . 38 7 Revision history . 39 2/40 Doc ID 023181 Rev 1