The MAX13300/MAX13302 combine four high-efficiency Class D amplifiers with integrated diagnostic hardware for reliable automotive audio systems. The MAX13300/ MAX13302 deliver up to 50W at 10% THD+N per channel into 2Ω when operating from a 14.4V 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 devices are programmable to four different I²C addresses.

The audio amplifiers feature single-ended analog inputs with a common negative input. Three gain settings are internally adjustable through the I²C interface to 13dB, 21.6dB, and 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. All the devices provide 50V load-dump protection, and are offered in the thermally enhanced, 48-pin TSSOP-EPR package operating over the -40°C to +125°C temperature range.

Applications

• Active Loudspeaker Systems
• Car Stereo
• Discrete Amplifier Modules
• Mobile Surround Systems
• Radio Head Units
• Rear-Seat Entertainment Units