EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX98396 20V Digital Input Class-DG Amplifier with I/V Sense and Brownout Prevention General Description Benefits and Features The MAX98396 is a high-efficiency, mono Class-DG Wide Input Supply Range (3.0V to 20V) speaker amplifier with industry-leading quiescent power Class-DG Operation Enables Industry-Leading featuring I/V sense, brownout-prevention engine (BPE), Quiescent Power and dynamic-headroom tracking (DHT). The IC enables 12.7mW at V = 12V , V = 3.8V PVDD VBAT ultrasound applications by providing support for sample 18mW at V = 19V, V = 5.0V PVDD VBAT rates up to 192kHz, a higher passband (for f > 50kHz), s Ultra-Low Noise Floor and a bypass path for the ultrasound signals through the 15.5V Output Noise RMS amplifier so it is not attenuated by the audio processing. 118dB Dynamic Range Precision output current and voltage monitoring (I/V Low Distortion sense) enables the host device to run speaker protection -82dB THD+N at 1W into 8, f = 1kHz algorithms. Spread-spectrum modulation (SSM) and edge -76dB THD+N at 1W into 8, f = 6kHz rate control minimize EMI and eliminate the need for the output filtering found in traditional Class-D devices. Output Power at 1% THD+N: 20W into 8, V = 19V PVDD To achieve industry-leading quiescent power, the Class- 19W into 4, V = 14V PVDD DG amplifier employs two supply rails VBAT (3V to 5.5V) and PVDD (3V to 20V) to supply the speaker amplifier. 60W Peak Output Power into 4, V = 19V PVDD The Class-DG amplifier switches between the two supply Speaker Amplifier Efficiency: rails depending on the input signal level and/or the supply 87% at 1W into 8, V = 12V, V = 3.8V PVDD VBAT headroom. The brownout-prevention engine in the device 83% at 1W into 4, V = 12V, V = 3.8V PVDD VBAT allows it to reduce its contribution to the overall system 83% at 1W into 8, V = 19V, V = 5.0V PVDD VBAT power consumption by either attenuating or limiting the 91% at 20W into 8, V = 19V, V = 5.0V PVDD VBAT amplifier output when the device supply drops below a set Class-D EMI Reduction Enables Filterless Operation of programmable thresholds. Additionally, as the power Spread-Spectrum Modulation supply voltage varies due to sudden transients and declin- Switching-Edge Rate Control ing battery life, DHT automatically optimizes the headroom Integrated Speaker Current and Voltage Sense do not available to the Class-DG amplifier to maintain consistent Require External Components distortion and listening levels. Flexible Brownout-Prevention Engine 2 2 The device provides a PCM interface for audio data and I S/16-Channel TDM and I C Digital Interfaces 2 a standard I C interface for control data communication. Playback Support for 16-, 24-, and 32-Bit Data Words 2 The PCM interface supports audio playback using I S, Playback and I/V Sense Support Sample Rates up to left-justified, and TDM audio data formats. A unique clock- 192kHz ing structure eliminates the need for an external master Audio Processing Bypass Path clock for PCM communication, which reduces pin count Dynamic-Headroom Tracking Maintains a Consistent and simplifies board layout. Enabling thermal foldback au- Listening Experience tomatically reduces the output power when the tempera- Extensive Click-and-Pop Suppression ture exceeds a user specified threshold. This allows for 35-Bump, WLP (0.4mm Pitch) uninterrupted music playback even at high ambient tem- Ordering Information appears at end of data sheet. peratures. Traditional thermal protection is also available in addition to robust overcurrent protection. The device is available in a 0.4mm pitch, 35-bump wafer- level package (WLP). The device operates over the ex- tended -40C to +85C temperature range. Applications Mobile Speakers Smart Speakers Smart IoT Tablets Notebook Computers Soundbars SMBus is a trademark of Intel Corp. 19-101016 Rev 1 4/21MAX98396 20V Digital Input Class-DG Amplifier with I/V Sense and Brownout Prevention Simplified Block Diagram MAX98396MAX98396 DYNAMIC BROWNOUT THERMAL HEADROOM PREVENTION PROTECTION/ TRACKING ENGINE FOLDBACK CLASS-DG DAC AMP CONTROL PCM AND AUDIO BUS INTERFACES CURRENT SENSE ADC 2 2 I C I C CONTROL VOLTAGE BUS INTERFACE SENSE ADC www.maximintegrated.com Maxim Integrated 2