- 79 -
61 PWM_HPMR DO PWM right channel headphone (differential -)
62 PWM_HPPR DO PWM right channel headphone (differential +)
63 MCLK DI MCLK is a 3.3-V clock master clock input
64
RESERVED
Connect to digital ground
3.5.12 function introduction to TAS5112DFD
1. DESCRIPTION
The TAS5112 is a high-performance, integrated stereo Digital Amplifier Power Stage designed to drive
6_ speakers at up to 50W per channel. The device incorporates TI’s equibit™ technology and is used in
conjunction with a Digital Audio PWM processor (TAS50XX) and a simple passive demodulation filter to
deliver high-quality, high efficiency True Digital Audio Amplification.
The efficiency of this digital amplifier is typically 88%, reducing the size of both the power supplies and heat
sinks needed. Heat sink should have thermal resistance of at least 3.5 C/W and mass of 140 grams. When running
both channels full power continuously, adequate thermal design is required. Over-Current Protection,
Over-Temperature Protection and Under-Voltage Protection are built into the TAS5112, safeguarding the
device and speakers against fault conditions that could damage the system.
2. FEATURES
◆ 2x50W (BTL) into 6O
◆ 95 dB SNR (TDAA system with TAS5026)
◆ < 0.06% THD+N (TDAA system - 1W RMS into 6O)
◆ < 0.2% THD+N (TDAA system - 50W RMS into 6O)
◆ Power efficiency typical 88% @ 6Oload
◆ Self-protection design (including under voltage, over temperature and short condition) with error
reports
◆ 56-pin DFD PowerPad
TM
package
◆ 3.3 V Digital Interface
◆ Internal Gate Drive Supply voltage Regulator
◆ EMI compliant when used with recommended system design
◆ Four matched DMOS power transistors
3. PIN DESCRIPTION
PIN Symbol I/O Description
28 GND
Power ground
27 GND P Power ground
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