Boosted Class-D Amplifier with Integrated Dynamic Speaker Management
EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX98390 Boosted Class-D Amplifier with Integrated
Dynamic Speaker Management General Description Benefits and Features The MAX98390 is a high-efficiency mono Class-D DSM
smart amplifier that features an integrated boost converter, integrated Dynamic Speaker ManagementTM, and
FET scaling for higher-efficiency at low output power. ● Integrated Speaker Current and Voltage Sense
Requires no External Components
● Integrated Programmable 10V Boost Converter
• Bypass Mode
• Envelope Tracking The maximum boost converter output voltage is programmable from 6.5V to 10V in 0.125V increments from a battery voltage as low as 2.65V. The boost converter supports bypass mode for lower quiescent current and improved mid-power efficiency as well as envelope tracking
which automatically adjusts the output voltage for maximum efficiency. The boosted supply efficiently delivers up
to 6.2W at 10% THD+N into a 4Ω load.
Integrated IV sense and Dynamic Speaker Management
allows louder, fuller audio while protecting the speaker
against damage and improving sound quality.
The PCM interface supports I2S, left-justified, and
16-channel TDM formats as a slave or master device with
I2C control. Either BCLK or MCLK can be used as the internal clock source providing system level flexibility.
Thermal and other status data can also be read from the
Patented active emissions limiting edge rate and overshoot control circuitry minimizes EMI and eliminates the
need for output filtering found in traditional Class-D devices.
A flexible brownout-detection engine (BDE) can be programmed to initiate various current limiting, signal limiting,
and clip functions to prevent dips in battery voltage.
Threshold, hysteresis, and attack-and-release rates are …