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The RTQ9128DL-QA is an ultra-low output noise, high- efficiency, four-channel class-D audio power amplifier. It delivers 4x27W into 4Ω at 10% THD+N from a 14.4V supply in automotive applications.It can achieve over 87% power efficiency with an output switching frequency of up to 2.1MHz for clarity, which enables a cost-optimized solution in a very small PCB size. Additionally, the RTQ9128DL-QA can be set either above the AM band, which eliminates the AM-band interference and reduces output filter size and cost, or below the AM band to optimize efficiency.The RTQ9128DL-QA is fully configurable through the I2C bus interface and features comprehensive diagnostics array specially designed for automotive applications.The built-in anti-pop functions can reduce the speaker’s pop noise under all kinds of scenarios. Its built-in protection circuits provide thermal fold-back, over-temperature, overcurrent, overvoltage, and undervoltage protections and report error status.The RTQ9128DL-QA is a 3-wire device that receives all clocks from external sources with standard I2S and TDM (Time-Division Multiplexing) formats. It supports a wide range of input sampling rates from 32kHz to 96kHz. The device is offered in a 64-pin RLQFP package with the exposed thermal pad facing up.The recommended junction temperature range is -40°C to 150°C, and the ambient temperature range is -40°C to 125°C.
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- AEC-Q100 Grade 1 Qualified
- I2S and TDM Input
- 4x22W, THD + N = 1%, 4Ω, 14.4V
- 4x27W, THD + N = 10%, 4Ω, 14.4V
- 4x45W, THD + N = 10%, 2Ω, 14.4V
- THD + N is 0.03%
- SNR up to 115dB
- Ultra-Low Quiescent Current Mode
- Ultra-Low Noise = 18μV
- Low RDS_ON (80mΩ)
- Switching Frequency up to 2.1MHz
- Sampling Frequency from 32kHz to 96kHz
- I2C Control with 16 Address Options
- Built-In Anti-Pop Function
- Built-In Thermal Fold-Back and Clip Detection
- Load Diagnostics
► Output Open Load and Short Load
► Output Short to Ground or Power
► DC and AC Coupled Load Detection - Protection Features
► Output Short-Circuit
► Overvoltage and Undervoltage
► Overcurrent Warning and Protection
► Over-Temperature
► DC Offset Detection
► 40V Load Dump - Ambient Temperature Range: -40°C to 125°C
- Junction Temperature Range:-40°C to 150°C
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Automotive Head Units<br>In-Vehicle Infotainment<br>Automotive External Amplifier Modules
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