The HFDA80D is a new STMicroelectronics class-D audio amplifier, specifically designed for automotive applications in the latest BCD technology.

The HFDA80D integrates advanced solutions for an excellent GSM noise immunity combined with the advantages of 2 MHz switching PWM class-D output stages. This configuration allows outstanding audio performance while designing a compact and inexpensive application.

The HFDA80D supports wide band applications up to 40 kHz, with extremely low level of noise and low THD.

Moreover, it features a broad diagnostics matrix, to support the most demanding OEM requirements in terms of speaker control and system robustness/reliability. The HFDA80D supports start/stop cranking down to 4.5 V and is housed in a very compact and thin LQFP48L 7x7x1.4 mm package, making it suitable for any level of automotive application.

• AEC-Q100 qualified
• Supply operating range: 4.5 V–18 V
• EMI compliance evaluated according to CISPR25
• Class-D BTL outputs
• Integrated 112 dB D/A conversion
• Battery load dump compatible (40 V)
• Reduced size and cost of output LC thanks to 2 MHz switching PWM
• I²S and TDM digital input (up to 16 channels TDM)
• Selectable input sample rate frequency (44.1/48/96/192 kHz)
• Multiple load configurations:
  • Able to drive 4 Ω and 2 Ω speaker loads
• MOSFET power outputs allowing high output power capability:
  • Typ. 4x29 W on 4 Ω at 14.4 V, 1 kHz, THD = 10%
  • Typ. 4x22.5 W on 4 Ω at 14.4 V, 1 kHz, THD = 1%
  • Typ. 4x47.5 W on 2 Ω at 14.4 V, 1 kHz, THD = 10%
  • Typ. 4x35.5 W on 2 Ω at 14.4 V, 1 kHz, THD = 1%
• Outstanding audio performances
  • THD 0.015% typ. at 1 W 1 kHz on 4 Ω loads
  • Output noise 27 μV typ. A-weighted
  • Crosstalk 100 dB typ. at 1 W 1 kHz on 4 Ω loads
  • PSRR 80 dB typ. at 1 W 1 kHz on 4 Ω loads
• Fast turn-on and very low latency for high-speed audio processing applications
• Very low latency for noise cancelling application
• I²C full configurability with channel independent mute/play/gain selection/diagnostic
• 4 I²C addresses
• Full diagnostic matrix with info available both on I²C and CD/DIAG pin:
  • 4 thermal warnings
  • Independent by-channel DC and AC load detection diagnostic with selectable threshold
  • Startup diagnostic for shorts to VCC/GND
  • OCP protection with configurable OCP limit (2 selectable)
  • Input offset detector
  • Free-running diagnostics Output current offset detector DC/AC diagnostic Including open-load in play detection
    
• Synchronization output pin
• Immune to pop/tick noise at turn on/off, battery variations, during diagnostic
• Legacy (backup mode without I²C control)
• Integrated short circuit protections
• ESD integrated protections (2 kV HBM, 500 V / 750 V corner CDM)
• LQFP48L exposed pad up package