Overview
The FDA803D-EHT, produced by STMicroelectronics, is a single bridge class D amplifier designed using advanced BCD technology. It is specifically intended for various automotive audio applications, including car radios, telematics, e-call systems, noise and tone generators, and more. This amplifier integrates a high-performance D/A converter and powerful MOSFET outputs, ensuring high efficiency (up to 90%) and compact design. It operates over a wide voltage range from 3.3 V to 18 V, making it compatible with standard car battery levels and external step-down generated voltages or emergency batteries.
The FDA803D-EHT features a feedback loop that includes an output L-C low-pass filter, enhancing frequency response linearity and reducing distortion. It is configurable through an I²C bus interface and includes a comprehensive diagnostics array, which is particularly useful for automotive applications.
Key Specifications
| Specification | Value |
|---|---|
| Input Sampling Frequency | 44.1 kHz, 48 kHz, 96 kHz, 192 kHz |
| Digital Input | I²S and TDM (4/8/16CH TDM) |
| D/A Conversion | Integrated 108 dB |
| Output Power | 1 x 25 W / 4 Ω @ 14.4 V, 1 kHz THD = 1% 1 x 30 W / 4 Ω @ 14.4 V, 1 kHz THD = 10% |
| Load Driving Capability | 2 Ω loads |
| Operating Voltage Range | 3.3 V to 18 V |
| I²C Bus | Full I²C bus driving (3.3/1.8 V) |
| Package | PowerSSO-36 exposed pad down |
| Operating Temperature | -40°C to 150°C |
| EMI Compliance | CISPR 25 - Class V (Fourth edition) |
Key Features
- AEC-Q100 qualified for automotive reliability
- Integrated 108 dB D/A conversion for high audio quality
- I²S and TDM digital input (4/8/16CH TDM)
- Full I²C bus driving (3.3/1.8 V) for configuration and diagnostics
- Wide operating supply range from 3.3 to 18 V
- MOSFET power outputs for high output power capability
- Power limiting function configurable through I²C
- Comprehensive diagnostics including short to VCC/GND, short load and open load detection, thermal warnings, DC offset detector, and clipping detector
- Integrated thermal protection and short circuit/ESD protections
- Legacy mode ('no I²C' mode) with 4 configurable settings
- Very low quiescent current and output low-pass filter for superior audio performance
Applications
The FDA803D-EHT is designed for various automotive audio applications, including:
- Car radios
- Telematics and e-call systems
- Noise and tone generators
- Standard single DIN car-radio boxes with tuners
Q & A
- What is the FDA803D-EHT designed for?
The FDA803D-EHT is designed for automotive audio applications, including car radios, telematics, e-call systems, and noise and tone generators.
- What is the operating voltage range of the FDA803D-EHT?
The FDA803D-EHT operates over a wide voltage range from 3.3 V to 18 V.
- What types of digital inputs does the FDA803D-EHT support?
The FDA803D-EHT supports I²S and TDM digital inputs (4/8/16CH TDM).
- What is the output power capability of the FDA803D-EHT?
The FDA803D-EHT can deliver 1 x 25 W / 4 Ω @ 14.4 V, 1 kHz THD = 1%, and 1 x 30 W / 4 Ω @ 14.4 V, 1 kHz THD = 10%.
- Does the FDA803D-EHT have built-in diagnostics?
Yes, the FDA803D-EHT includes a comprehensive diagnostics array, including short to VCC/GND, short load and open load detection, thermal warnings, DC offset detector, and clipping detector.
- Is the FDA803D-EHT EMI compliant?
Yes, the FDA803D-EHT is CISPR 25 - Class V (Fourth edition) compliant.
- What is the package type of the FDA803D-EHT?
The FDA803D-EHT comes in a PowerSSO-36 exposed pad down package.
- Does the FDA803D-EHT support legacy mode operation?
Yes, the FDA803D-EHT can operate in legacy mode ('no I²C' mode) with 4 configurable settings.
- What kind of protections does the FDA803D-EHT have?
The FDA803D-EHT includes integrated thermal protection, short circuit protection, and ESD protection.
- Is the FDA803D-EHT qualified for automotive use?
Yes, the FDA803D-EHT is AEC-Q100 qualified for automotive reliability.
