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

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 Compare all products in PWM Input Class-D

 
Power to Bridge Tied Load (Max) (W)
Power to Parallel Bridge Tied Load (Max) (W)
THD + N @ 1 kHz (%)
SNR (dB)
Speaker Channels (Max)
Power Stage Supply (Max) (V)
Analog Supply (V) (Min)
Analog Supply (V) (Max)
Closed/Open Loop
Control Interface
Supported Bridge Tied Load (Min) (Ohms)
Supported Parallel Bridge Tied Load (Min) (Ohms)
Output Power (W)
Dynamic Range (dB)
Power to Single-Ended Load (Max) (W)
TAS5634 TAS5612LA TAS5614LA TAS5622A TAS5624A TAS5631B
300    125    150    150    200    300   
600    250    300    300    400    400   
0.025    0.05    0.03    0.025    0.025    0.03   
105    105    105    105    105    103   
4    4    4    4    4    4   
58    32.5    36    34    36    52.5   
10.8    10.8    10.8    13.2    13.2    10.8   
13.2    13.2    13.2    10.8    10.8    13.2   
Closed    Closed    Closed    Closed    Closed    Closed   
Hardware    Hardware    Hardware    Hardware    Hardware    Hardware   
6    4    4    3    3    4   
3    2    2    1.5    1.5    2   
300    125    150    125    150    300   
102    103    103    105    105    110   
150    65    75    65    75    145   

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