TPA6045A4C Series

2-W, stereo Class-AB speaker & headphone amplifier, 3.3-V LDO & active high enable

Catalog

2-W, stereo Class-AB speaker & headphone amplifier, 3.3-V LDO & active high enable

Part	Output Type	Features	Package / Case	Voltage - Supply [Min]	Voltage - Supply [Max]	Max Output Power x Channels @ Load	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Supplier Device Package	Type
Texas Instruments TPA6045A4CRHBR	2-Channel (Stereo) with Stereo Headphones	Differential Inputs Short-Circuit and Thermal Protection Shutdown	32-VFQFN Exposed Pad	4.5 V	5.5 V	2.6 W 200 mW	85 °C	-40 °C	Surface Mount	32-VQFN (5x5)	Class AB

Catalog

2-W, stereo Class-AB speaker & headphone amplifier, 3.3-V LDO & active high enable

Key Features

• MicrosoftWindows Vista CompliantFully Differential Architecture and High PSRR Provide Excellent RF Rectification Immunity2.1-W, 1% THD+N Into 4-Ω Speakers and 85-mW, 1% THD+N Into 16-Ω Headphones From 5-V SupplyDirectPathHeadphone Amplifier Eliminates Output Capacitors(1)Internal 4-Step Speaker Gain Control: 10, 12, 15.6, 21.6 dB and Fixed -1.5-V/V Headphone3.3-V Low Dropout Regulator for CODECIndependent Shutdown Controls for Speaker, Headphone Amplifier, and Low Dropout Regulator (LDO)Output Short-Circuit and Thermal ProtectionAPPLICATIONSNotebook ComputersPortable DVD(1)US Patent Number 5289137MicrosoftWindows Vista CompliantFully Differential Architecture and High PSRR Provide Excellent RF Rectification Immunity2.1-W, 1% THD+N Into 4-Ω Speakers and 85-mW, 1% THD+N Into 16-Ω Headphones From 5-V SupplyDirectPathHeadphone Amplifier Eliminates Output Capacitors(1)Internal 4-Step Speaker Gain Control: 10, 12, 15.6, 21.6 dB and Fixed -1.5-V/V Headphone3.3-V Low Dropout Regulator for CODECIndependent Shutdown Controls for Speaker, Headphone Amplifier, and Low Dropout Regulator (LDO)Output Short-Circuit and Thermal ProtectionAPPLICATIONSNotebook ComputersPortable DVD(1)US Patent Number 5289137

Description

The TPA6045A4C is a stereo audio power amplifier and DirectPath headphone amplifier in a thermally enhanced, space-saving, 32-pin QFN package. The speaker amplifier is capable of driving 2.1 W per channel continuously into 4-Ω; loads at 5 V. The headphone amplifier achieves a minimum of 85 mW at 1% THD+N from a 5-V supply. A built-in internal 4-step gain control for the speaker amplifier and a fixed - 1.5 V/V gain for the headphone amplifier minimizes external components needed. Independent shutdown control and dedicated inputs for the speaker and headphone allow the TPA6045A4C to simultaneously drive both headphones and internal speakers. Differential inputs to the speaker amplifiers offer superior power-supply and common-mode noise rejection. The TPA6045A4C is a stereo audio power amplifier and DirectPath headphone amplifier in a thermally enhanced, space-saving, 32-pin QFN package. The speaker amplifier is capable of driving 2.1 W per channel continuously into 4-Ω; loads at 5 V. The headphone amplifier achieves a minimum of 85 mW at 1% THD+N from a 5-V supply. A built-in internal 4-step gain control for the speaker amplifier and a fixed - 1.5 V/V gain for the headphone amplifier minimizes external components needed. Independent shutdown control and dedicated inputs for the speaker and headphone allow the TPA6045A4C to simultaneously drive both headphones and internal speakers. Differential inputs to the speaker amplifiers offer superior power-supply and common-mode noise rejection.