HFDA801AVYT | ST | Automotive Grade 4-Channel Class D Digital Audio Power Amplifier, AEC-Q100 Certified, for Vehicle Infotainment and AVAS Low-Speed Annunciation System

HFDA801A‑VYT

I. Appearance and packaging

Package: 64-LQFP-EP (with exposed heat sink pads), size 10 × 20 × 1.5 mm, surface mount, reel-to-reel TR packaging

Appearance description: square plastic-sealed body, 64 exposed pins on all sides; A large area of exposed metal pad at the bottom of the chip, used for PCB heat dissipation, must be fully soldered and grounded; The top surface is printed with the ST logo and the model number silk-screened; The exposed pad is the key to heat dissipation, and false soldering of the pad will severely reduce power and trigger overheat protection.

Model suffix: ‑VYT for roll band;‑VYY is in bulk; Moisture sensitivity level MSL3, reflow soldering needs to control the opening and storage time STMicroele...。

2. Core electrical performance

form

parameter

Specifications

passageway

4-channel D-class amplifier (four-bridge BTL output)

Maximum output power

4×80W@4Ω/25V;4×50W@2Ω/14.4V STMicroele...

Power supply voltage

4.5V-25V, supports car start-stop drop, can withstand 40V throw load impact STMicroele...

Audio input

I²S/TDM digital input, sampling rate 44.1 / 48 / 96 / 192 kHz, up to 80 kHz bandwidth

Built-in DAC

24-bit, dynamic range 120dB, signal-to-noise ratio 121dB, output noise 10μV

PWM switching frequency

2MHz, reduce EMI interference

THD Total Harmonic Distortion

Typical 0.02% (1W, 1kHz, 4Ω) STMicroele...

Communication configuration

I²C interface, 4 groups of I²C addresses, channel independent configuration, mute, gain adjustmentSTMicroele...

Protection and diagnosis

Overcurrent OCP, overheat, output open / short circuit, DC offset detection; Digital impedance meter DIM, real-time monitoring of speaker current;But I²C can read junction temperature and fault status

Operating temperature

-40℃ ~ + 105℃ (automotive environment temperature)

Authentication

AEC‑ Q100 automotive grade, suitable for ASIL‑ B related audio functions (AVAS)

III. Working principle

Using ST BCD process, full digital input architecture, on-chip integrated 24-bit DAC, I2S/TDM digital audio is converted into analog signal; Internal 2MHz PWM modulation of four power bridge outputs; The special feedback architecture integrates LC demodulation filter into the feedback loop, reduces the dependence on external inductance and capacitance parameters, and the sound quality is less affected by external devices. Built-in complete diagnostic engine, real-time monitoring of speaker load, short circuit, open circuit, chip junction temperature during playback, fault information reported to the master through I2C, meeting the diagnosis requirements of car manufacturers STMicroele...。

IV. Core Function Highlights

Car-grade all-digital power amplifier, directly receives I²S/T DM, no need for external DAC, simplifies the car power amplifier hardware scheme.

Strong diagnostic capability, real-time detection of speaker status during playback, supports AVAS electric vehicle low-speed warning sound safety-related applications, meets ASIL-B system requirements.

Wide power tolerance, compatible with car start-stop and dumping load, suitable for 12V car battery system.

Low distortion, low base noise, high fidelity car sound quality; There is no POP explosion noise when switching on and off.

Supports parallel channels, can drive 2Ω low impedance speakers, and increase output power.

The I²C can flexibly configure gain, mute, and protection thresholds, and also supports running STMicroele without the traditional I²C mode....。

V. Typical application scenarios

Car information entertainment main unit, car power amplifier; Four-door car speaker driver

New energy vehicle AVAS acoustic vehicle alarm system (low-speed pedestrian warning sound), safety-related audio output STMicroele...

Vehicle domain controller audio subsystem

High-power audio equipment for commercial vehicles and special vehicles

Note: It is a car audio device, not a safety power chip; When used for ASIL-B systems, it needs to be combined with the overall security decomposition of the MCU.

For technical and business consulting, please contact: 182778968089