The TPA2054D4A features a stereo Class-D power amplifier along with a stereo DirectPath™ headphone amplifier. The TPA2054D4A has a mono differential input and two stereo single-ended (SE) inputs that can be configured as one stereo differential input. Both input channels have a 32-step volume control and the DirectPath headphone amplifier has a 4-level gain control for coarse volume adjustment. All amplifiers have output short-circuit and thermal- overload protection.

The Class-D amplifiers deliver 1.25 W into 8  at 1% THD from a 5.0 V supply, and 700 mW from 3.6 V. The DirectPath headphone amplifier features an output voltage limiter to reduce the maximum output power to one of seven possible limits. The voltage limiter is programmed through the I²C interface.

DirectPath eliminates the need for external DC- blocking output capacitors to the headphones. The built-in charge pump creates a negative supply voltage for the headphone amplifier, allowing a 0 V DC bias at the output.

The DirectPath headphone amplifier gains are +6 dB (default), 0 dB, –6 dB, and –14 dB, selected through the I2C interface. This allows the headphone volume to be different from the loudspeaker volume if both are used simultaneously.

The TPA2054D4A has a 3:1 input MUX for audio source selection. Mode and gain controls operate from a 1.7 V to 3.6 V compatible I²C interface.

The voltage supply range for both the Class-D amplifiers and the headphone charge pump is 2.5 V to 5.5 V. The Class-D amplifiers use a combined 7 mA and the headphone amplifier uses 10 mA of typical quiescent current.

Total supply current in shutdown reduces to less than 4 µA. Undervoltage lockout keeps supply current to less than 4 µA when the supply voltage is less than 2.1 V.

The TPA2054D4AYZK is available in a 25-ball 2,61 mm × 2,61 mm WCSP package.

• Stereo Class-D Amp:
  • 1.4 W into 8 from 5.0 V (10% THD + N)
  • 1.25 W into 8 from 5.0 V (1% THD + N)
• DirectPath? Stereo Headphone Amplifier
  • No Output Capacitors Required
• Independent Gain Select for Headphone Amplifier
• Eight Programmable Maximum Headphone Voltage Limits
• Two Single-Ended or One Differential Stereo Input
• 3:1 Input MUX with Mode Control
• 32-Step Volume Control for Both Input Channels
• Independent Shutdown for Headphone and Class-D Amplifiers
• Short-Circuit and Thermal-Overload Protection
• ±8 kV HBM ESD Protection on Headphone Outputs
• I2C? Interface
• 25-Ball 2,61 mm × 2,61 mm WCSP
• APPLICATIONS
  • Smart Phones / Cellular Phones
  • Laptop Computers
  • Portable Gaming
  • Portable Media Players

DirectPath is a trademark of Texas Instruments. I2C is a trademark of NXP Semiconductors.

• Audio input type
• Analog Input
• Architecture
• Class-D
• Speaker channels (Max)
• Stereo
• Power stage supply (Max) (V)
• 5.5
• Power stage supply (Min) (V)
• 2.5
• Load (Min) (ohms)
• 8
• Output power (W)
• 2.4
• SNR (dB)
• 90
• THD + N @ 1 kHz (%)
• 0.18
• Iq (Typ) (mA)
• 10
• Control interface
• I2C
• Closed/open loop
• Open
• Analog supply (Min) (V)
• 2.5
• Analog supply (Max) (V)
• 5.5
• PSRR (dB)
• 78.5
• Operating temperature range (C)
• -40 to 85

TPA2054D4A的完整型号有：TPA2054D4AYZKR、TPA2054D4AYZKT，以下是这些产品的关键参数及官网采购报价：

TPA2054D4AYZKR，工作温度：-40 to 85，封装：DSBGA (YZK)-25，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网TPA2054D4AYZKR的批量USD价格：1.278（1000+）

TPA2054D4AYZKT，工作温度：-40 to 85，封装：DSBGA (YZK)-25，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网TPA2054D4AYZKT的批量USD价格：1.534（1000+）

TPA2054D4A PSpice Model (Rev. A)

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

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