MAX13301 Datasheet, PDF (1/37 Pages) Maxim Integrated Products – 4-Channel, Automotive Class D Audio Amplifier Feedback After the Filter

19-5955; Rev 0; 6/11
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4-Channel, Automotive Class D Audio Amplifier
General Description
The MAX13301 combines four high-efficiency Class D
amplifiers with integrated diagnostic hardware for reli-
able automotive audio systems, and delivers up to 80W
at 10% THD+N per channel into 4I 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 sys-
tem to query critical device parameters such as device
temperature and output clipping. The device is program-
mable 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 -40NC to +125NC temperature range.
Applications
Car Stereo
Rear-Seat Entertainment Units
Discrete Amplifier Modules
Active Loudspeaker Systems
Radio Head Units
Mobile Surround Systems
Typical Operating Circuit appears at end of data sheet.
Features
S High Output Power (10% THD+N)
 2 x 160W into 2I at 24V
 4 x 80W into 4I at 24V
S 2 Channels Can Be Paralleled
S Feedback After the Filter
 Improves THD+N
 Low Output Impedance
 High-Frequency Response
 Improved Damping of Complex Loads
 Enables Low-Cost Inductors
S 102dB SNR
S Low 0.04% THD+N
S 70dB PSRR
S On-Board Diagnostics
 Short-to-Battery/GND
 Open/Shorted Load
 Tweeter Detect
S 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
S Four-Address I²C Control Interface
S Low-Power Shutdown Mode
S Up to 90.5% Efficiency
S -40°C to +125°C Ambient Operating Temperature
S 48-Pin TSSOP-EPR (Top Side Exposed Pad) Package
S AEC-Q100 Qualified
Ordering Information
PART
PIN-PACKAGE
SUPPLY VOLTAGE
RANGE (V)
MAX13301AUM/V+ 48 TSSOP-EPR*
6 to 25.5
Note: The device operates over the -40°C to +125°C operating
temperature range.
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EPR = Top side exposed pad.
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