SY2A54522

• Wide Voltage Range 
•   -- 4.5V to 28V with Under and Over Voltage Protection 
•   -- 40V Load-dump Protection per ISO-16750-2
• High Output Power Capability
•   -- 22W/4 Ω, 0.1% THD+N at 14.4V
•   -- 38W/8Ω, <1% THD+N at 28V
• Excellent Audio performance
•   -- 0.03% THD+N at 1W/4 Ω 12V
•   -- 102dB A-weighted SNR
• Comprehensive Protection
•   -- Under Voltage, Over Voltage, Over Temperature, Over Current, DC Detection Protection with Auto Recovery
•   -- Selectable Power Limit Function for Speaker Protection
• Load Diagnostic Functions:
•   -- Open and Shorted Output Load
•   -- Output-to-ground and Output-to-PVDD Shorts and Shorted Output Indicator 
• 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
• Differential/Single-ended Input
• I2C Deglitch
• Spread Spectrum and Programmable Edge Rate to Optimize EMC Performance

The SY2A54522 is a high efficiency mono Class-D audio power amplifier for automotive emergency call (e-Call), telematics, instrument cluster, and acoustic vehicle alerting system (AVAS) applications. It can output 22W into 4Ω load at less than 10% THD+N from a 14.4V supply. The product can operate on a wide voltage range with battery supply. The adjustable power limit function allows user to set a virtual voltage rail lower than supply voltage to limit the amount of current through the speaker. Output DC detection circuit prevents speaker damage from long-time current stress if the input capacitors are damaged or shorts exist on the inputs.

The SY2A54522 can drive a mono speaker as low as 2Ω. The high efficiency of the amplifier allows eliminating an external heat sink when playing music.

Over current protection can protect amplifier from output short to GND, PVDD, and output-to-output. The overcurrent protection, DC protection, and overtemperature protection include an auto-recovery feature. The amplifier also has a built-in load diagnostic function designed for detecting the status of output connections at start. It supports the following diagnostics: speaker wire shorted to GND or PVDD, speaker cross-shorted, and speaker open. The diagnostics result is reported by the I²C registers and the FAULTZ pin.

The SY2A54522 is available in a compact TSSOP16E package.