A22H165J STMicroelectronics

A22H165 High-performance class-G stereo headphone amplifier Datasheet - production data Applications A22H165 - Flip-chip Cellular / smart phones Portable media player Wearable Fitness and healthcare Description Pinout (top view) The A22H165 is a class-G stereo headphone TOP VIEW driver dedicated to high-performance audio, high INR- VOUTR GAIN EN D power efficiency and space-constrained applications. It is based on the core technology of INR+ C2 CMS PVSS C a low power dissipation amplifier combined with a high efficiency step-down DC-DC converter for INL+ HPVDD C1 AGND B supplying this amplifier. When powered by a INL- VOUTL AVDD SW battery, the internal step down DC-DC converter A generates the appropriate voltage to the amplifier 432 1 depending on the amplitude of the audio signal to Balls are undemeath supply the headsets. It achieves a total 2.1 mA current consumption at 100 W output power (10 dB crest factor). THD+N is 0.02 % maximum at 1 Features kHz and PSRR is 100 dB at 217 Hz, which Power supply range: 2.3 V to 4.8 V ensures a high audio quality of the device in a wide range of environments. The traditionally 0.6 mA/channel quiescent current bulky output coupling capacitors can be removed. 2.1 mA current consumption with A dedicated common-mode sense pin removes 100 W/channel (10 dB crest factor) parasitic ground noise. The A22H165 is designed 0.006% typical THD+N at 1 kHz to be used with an output serial resistor. It ensures unconditional stability over a wide range 100 dB typical PSRR at 217 Hz of capacitive loads. The A22H165 is packaged in 100 dB of SNR A-weighted at G = 0 dB a tiny 16-bump flip-chip package with a pitch of Zeropop and clic 400 m. Gain settings: 0 dB and 6 dB Integrated high efficiency step-down converter Low standby current: 5 A max Output-coupling capacitors removed Thermal shutdown Flip-chip package: 1.65 mm x 1.65 mm, 400 m pitch, 16 bumps July 2020 DocID026036 Rev 2 1/37 This is information on a product in full production. www.st.comContents A22H165 Contents 1 Absolute maximum ratings and operating conditions . 3 2 Typical application schematic . 5 3 Electrical characteristics . 7 4 Application information . 22 4.1 Gain control . 22 4.2 Overview of the class-G, 2-level headphone amplifier . 22 4.3 External component selection . 24 4.3.1 Step-down inductor selection (L1) . 24 4.3.2 Step-down output capacitor selection (C ) . 24 t 4.3.3 Full capacitive inverter capacitors selection (C12 and C ) . 25 SS 4.3.4 Power supply decoupling capacitor selection (Cs) 25 4.3.5 Input coupling capacitor selection (C ) . 25 in 4.3.6 Low-pass output filter (R and C ) and IEC 61000-4-2 ESD out out protection 26 4.3.7 Integrated input low-pass filter 27 4.4 Single-ended input configuration . 27 4.4.1 Layout recommendations for single-ended operation 28 4.5 Startup phase 31 4.5.1 Auto zero technology . 31 4.5.2 Input impedance 31 4.6 Layout recommendations . 31 4.6.1 Common-mode sense layout . 32 5 Package information 33 6 Ordering information . 35 7 Revision history . 36 2/37 DocID026036 Rev 2