[christianw.]

Krankes Teil, guckst du hier:

http://www.maximintegrated.com/datasheet...p/id/7428/

Kann gesampled werden, beim Preis von 20$@1k sollte man aber nicht mehr als 2 "bestellen".

Zitat:The MAX13301 combines four high-efficiency Class D amplifiers with integrated diagnostic hardware for reliable automotive audio systems, and delivers up to 80W at 10% THD+N per channel into 4Ω when operating from a 24V supply.

The internal diagnostics evaluate each channel's output impedance to check for shorts across the outputs, to the battery, or to ground. The I²C interface allows the system to query critical device parameters such as device temperature and output clipping. The device is programmable to four different I²C addresses.

The audio amplifiers feature single-ended analog inputs with a common negative input. The MAX13301 has a fixed gain of 26dB.

The Class D amplifier has 10 programmable switching frequencies between 300kHz and 750kHz.

The BTL outputs are protected against short circuits and thermal overload. The outputs can be configured as a 2-, 3-, or 4-channel amplifier. The device provides 50V load-dump protection, and is offered in the thermally enhanced, 48-pin TSSOP-EPR package operating over the -40°C to +125°C temperature range.

• High Output Power (10% THD+N)
  2 x 160W into 2Ω at 24V
  4 x 80W into 4Ω at 24V
  
• 2 Channels Can Be Paralleled
  
• Feedback After the Filter
  Improves THD+N
  Low Output Impedance
  High-Frequency Response
  Improved Damping of Complex Loads
  Enables Low-Cost Inductors
  
• 102dB SNR
  
• Low 0.04% THD+N
  
• 70dB PSRR
  
• On-Board Diagnostics
  Short-to-Battery/GND
  Open/Shorted Load
  Tweeter Detect
  
• Protection and Monitoring Functions:
  Short-Circuit Protection
  50V Load-Dump Protection
  Programmable Clip Detection
  DC Offset Detection
  Open Battery/GND Tolerant
  Thermal-Overload Protection
  Thermal Warning Indication
  
• Four-Address I²C Control Interface
  
• Low-Power Shutdown Mode
  
• Up to 90.5% Efficiency
  
• -40°C to +125°C Ambient Operating Temperature
  
• 48-Pin TSSOP-EPR (Top Side Exposed Pad) Package
  
• AEC-Q100 Qualified