MAX13301

4-Channel, Automotive Class D Audio Amplifier

Offers Wide Operating Voltage Range (6V to 25.5V) with Full Automotive Diagnostics and Load-Dump Protection


Description

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.
MAX13301: Typical Operating Circuit MAX13301: Typical Operating Circuit Enlarge+

Key Features

  • 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

Applications/Uses

  • Active Loudspeaker Systems
  • Car Stereo
  • Discrete Amplifier Modules
  • Mobile Surround Systems
  • Radio Head Units
  • Rear-Seat Entertainment Units
Part Number Class Spkr. Amp. VCC
(V)
Spkr. Amp. VCC
(V)
Spkr. Amp. ICC
(mA)
POUT into 4Ω @ 1% THD+N
(W)
POUT into 4Ω @ 10% THD+N
(W)
Spkr. Amp. Half Pwr. THD+N
(%)
SNR
(dB)
PSRR
(dB)
min max typ min min A- Weighted min
MAX13301  D 6 25.5 180 66 80 0.05 102 70
See All Speaker Amplifiers (34)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

App Note 4943 Diagnosing Automotive Faults with Class D Audio Amplifiers

Quality and Environmental Data

Product Reliability Reports: MAX13301.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
 

Related Resources