TAS5634 300-W Stereo / 600-W Mono HD Digital Input, 58V Class-D Amplifier Power Stage | TI.com

TAS5634 (ACTIVE) 300-W Stereo / 600-W Mono HD Digital Input, 58V Class-D Amplifier Power Stage

 

Description

The TAS5634 is a PWM-input, Class-D amplifier power stage that supports 2 x 300 W (6 Ω) or 1 x 600 W (3 Ω) output power with a nominal power supply voltage of 58V. The 58V supply voltage provides support for higher impedance speaker loads including 6 Ω in BTL and 3 Ω in PBTL. Integrated MOSFETs and a new gate drive scheme provide high peak efficiency and low idle losses to reduce thermal solution size.

The TAS5634 uses a closed-loop feedback design with constant voltage gain. The internally matched gain resistors ensure a high power supply rejection ratio (PSRR) and low output noise due to switch mode power supplies (SMPS).

The TAS5634 is a fully integrated power stage compatible with TI’s portfolio of digital-input (I2S) audio processors and modulators, like the TAS5548 and TAS5558, making it a complete digital-input Class-D amplifier. The TAS5634 is available in the surface mount 44-pin HTSSOP package and is part of a pin-compatible family of PWM-input Class-D power stages including the TAS5612LA, TAS5614LA and TAS5624A.

Features

  • PWM-Input, Class-D Amplifier Power Stage compatible with TI Digital-Input (I2S) Audio Processors and Modulators
  • HD Integrated Closed-Loop Feedback provides:
    • 0.025% THD at 1 W into 6 Ω
    • >70 dB PSRR (No Input Signal)
    • >105 dB SNR (A-weighted)
  • Output Power at 10%THD+N
    • 600 W / 3 Ω PBTL Mono Configuration
    • 300 W / 6 Ω BTL Stereo Configuration
    • 230 W / 8 Ω BTL Stereo Configuration
  • Output Power at 1%THD+N
    • 465 W / 3 Ω PBTL Mono Configuration
    • 240 W / 6 Ω BTL Stereo Configuration
    • 180 W / 8 Ω BTL Stereo Configuration
  • Integrated 80 mΩ MOSFETs for Reduced Heatsink Size
    • >91% Efficiency at Full Output Power
    • >75% Efficiency at 1/8 Output Power
  • Click and Pop Free Startup
  • Device Protection: Undervoltage, Over Temperature, Overcurrent, Short Circuit Protection and DC Speaker Protection
  • Pre-Clipping Output Signal for Control of a Class-G Power Supply
  • 44-Pin HTSSOP (DDV) Package with Thermal Pad on the Top

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Parametrics

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Part number Order Audio input type Architecture Speaker channels (Max) Power stage supply (Min) (V) Power stage supply (Max) (V) Output power (W) Load (Min) (ohms) SNR (dB) THD + N @ 1 kHz (%) Iq (Typ) (mA) Control interface Closed/open loop Analog supply (Min) (V) Analog supply (Max) (V) Power to parallel bridge tied load (Max) (W) PSRR (dB) Operating temperature range (C) Rating
TAS5634 Order now PWM     Class-D     4     12     58     300     3     105     0.025     29.5     Hardware     Closed     10.8     13.2     600     70     0 to 70     Catalog    
TAS5612LA Order now PWM     Class-D     4     12     32.5     125     4     105     0.05     22.3     Hardware     Closed     10.8     13.2     250     80     0 to 125     Catalog    
TAS5614LA Order now PWM     Class-D     4     12     36     150     4     105     0.03     22.3     Hardware     Closed     10.8     13.2     300     80     0 to 125     Catalog    
TAS5622A Order now PWM     Class-D     4     12     34     125     1.5     105     0.025     23.4     Hardware     Closed     13.2     10.8     300     65     -40 to 125     Catalog    
TAS5624A Order now PWM     Class-D     4     12     36     150