SY2A54055HFA (SA51054HFA)

• 22W into a 4Ω Load at <10% THD+N from a 14.4V Supply
• Qualified for Automotive Applications
• AEC-Q100 Qualified with the Following Results:
•  --Device Temperature Grade 1: -40°C to 125°C 
•  --Ambient Operating Temperature Range
•  --Device HBM ESD Classification Level H2
•  --Device CDM ESD Classification Level C3
• High Efficient Class-D Operation Eliminating Need for Heat Sink
• Operates from 4.5V to 18V
• Thermal and Over-Current Protection 
• Load Diagnostic Functions:
•  --Open and Shorted Output Load
•  --Output-to-Ground and Output-to-PVDD Shorts
• Comprehensive Click and Pop Suppression
• Space-Saving Surface Mount TSSOP16E Package

The SY2A54055 is a 22W, efficient Class-D audio power amplifier for driving a bridged-tied mono speaker for automotive emergency call (eCall), telematics, instrument cluster and infotainment applications. An adjustable power limiter allows the user to set a virtual voltage rail lower than the chip supply to limit the amount of current through the speaker. The DC detection circuit measures the frequency and amplitude of the PWM signal and shuts off the output stage if the input capacitors are damaged or shorts exist on the inputs.

The SY2A54055 can drive a mono speaker as low as 2Ω. The high efficiency of the device, eliminates the need for an external heat sink when playing music.

Fully short protections include output short to GND, PVDD, and output-to-output. The short-circuit protection and thermal protection includes an auto-recovery feature. The device also incorporates load diagnostic circuitry designed for detecting and determining the status of output connections at start. It supports the following diagnostics: short to GND, short to PVDD, short load, open load. The device reports the presence of any of the short or open conditions to the system via I2C.