四通道车载数字放大器 FOUR-CHANNEL AUTOMOTIVE DIGITAL AMPLIFIERS
DESCRIPON
The TAS5414 and TAS5424 are four-channel digital audio amplifiers designed for use in automotive head units and external amplifier modules. The TAS5414 and TAS5424 provide four channels at 23 W continuously into 4 Ω at less than 1% THD+N from a 14.4-V supply. Each channel can also deliver 38 W into 2 Ω at 1% THD+N. The TAS5414 uses single-ended analog inputs, while the TAS5424 employs differential inputs for increased immunity to common-mode system noise. The digital PWM topology of the TAS5414 and TAS5424 provides dramatic improvements in efficiency over traditional linear amplifier solutions. This reduces the power
dissipated by the amplifier by a factor of ten under typical music playback conditions. High efficiency is accomplished without the need for complicated power-supply schemes. Multiple TAS5414s or TAS5424s can be synchronized to meet high-channel-count applications.
FEATURES
• TAS5414 – Single-Ended Input
• TAS5424 – Differential Input
• Four-Channel Digital Power Amplifier
• Four Analog Inputs, Four BTL Power Outputs
• Typical Output Power per Channel at 10% THD+N
– 28 W/Ch Into 4 Ω at 14.4 Vdc
– 45 W/Ch Into 2 Ω at 14.4 Vdc
– 58 W/Ch Into 4 Ω at 21 Vdc
– 116 W/Ch Into 2 Ω at 21 Vdc PBTL
• Channels Can Be Paralleled PBTL for 1-Ω Applications
• THD+N < 0.02%, 1 kHz, 1 W Into 4 Ω
• Patented Pop- and Click-Reduction Technology
– Soft Muting With Gain Ramp Control
– Common-Mode Ramping
• Patented AM Interference Avoidance
• Patented Cycle-by-Cycle Current Limit
• 75-dB PSRR
• Four-Address I2C Serial Interface for Device Configuration and Control
• Configurable Channel Gains: 12-dB, 20-dB, 26-dB, 32-dB
• Load Diagnostic Functions:
– Output Open and Shorted Load
– Output-to-Power and -to-Ground Shorts
– Patented Tweeter Detection
• Protection and Monitoring Functions:
– Short-Circuit Protection
– Load-Dump Protection to 50 V
– Fortuitous Open Ground and Power Tolerant
– Patented Output DC Level Detection While Music Playing
– Overtemperature Protection
– Over- and Undervoltage Conditions
– Clip Detection
• 36-Pin PSOP3 DKD Power SOP Package With Heat Slug Up for the TAS5414
• 44-Pin PSOP3 DKD Power SOP Package With Heat Slug Up for the TAS5424
• Designed for Automotive EMC Requirements
• Pb-Free Soldering Supported
• AECQ100 Compliant
• ISO9000:2002 TS16949 Certified
• –40°C to 105°C Ambient Temperature Range
APPLICATIONS
• High-power OEM/retail head units and amplifier modules where feature densities and
system configurations require reduction in heat from the audio power amplifier