TPA6138A2 - 具有可调节增益的 DIRECTPATH? 耳机驱动器

TPA6138A2是TI德州仪器公司的一款耳机放大器产品，TPA6138A2是具有可调节增益的 DIRECTPATH? 耳机驱动器，本站介绍了TPA6138A2的封装应用图解、特点和优点、功能等，并给出了与TPA6138A2相关的TI元器件型号供参考。

TPA6138A2 - 具有可调节增益的 DIRECTPATH? 耳机驱动器 - 耳机放大器 - 低功耗放大器 - 德州仪器

产品特性

Stereo DirectPath™ Headphone Amplifier
- 40 mW Into 32 Ω With 3.3-V Supply
Low THD+N < 0.01% at 10 mW Into 32 Ω
High SNR, >90 dB
Differential Input and Single-Ended Output
Adjustable Gain by External Gain-Setting Resistors
Configurable as a Second-Order Low-Pass Filter
- Ideal for PWM Audio Sources
Low DC Offset, <1 mV
Ground-Referenced Outputs Eliminate DC-Blocking Capacitors
- Reduce Board Area
- Reduce Component Cost
- Improve THD+N Performance
- No Degradation of Low-Frequency Response Due to Output Capacitors
Short-Circuit Protection
Click- and Pop-Reduction Circuitry
External Undervoltage Mute
Active Mute Control for Pop-Free Audio On/Off Control
Space-Saving TSSOP Package

产品应用

LCD and PDP TV
Blu-ray Disc™, DVD Players
Set-Top Boxes
Mini/Micro Combo Systems
Sound Cards
Laptops

产品说明

The TPA6138A2 is a pop-free stereo headphone amplifier designed to allow the removal of the output dc-blocking capacitors for reduced component count and cost. The device is ideal for single-supply electronics where size and cost are critical design parameters.

Designed using TI’s patented DirectPath™ technology, The TPA6138A2 is capable of driving 25 mW into a 32-Ω load with 3.3-V supply voltage. The device has differential inputs and uses external gain-setting resistors that supports a gain range of ±1 V/V to ±10 V/V. Gain can be configured individually for each channel. The device can also be configured as a second-order low-pass filter and is ideal for interfacing with PWM audio sources. Audio output compiles with ±8-kV IEC ESD protection, requiring just a simple resistor-capacitor ESD protection circuit. The TPA6138A2 has built-in active-mute control for pop-free audio on/off control. The TPA6138A2 has an external undervoltage detector that mutes the output when the power supply is removed, ensuring a pop-free shutdown.

Using the TPA6138A2 in audio products can reduce component count considerably compared to traditional headphone amplifiers. The TPA6138A2 does not require a split-rail power supply or a dc blocking capacitor. The TPA6138A2 integrates its own charge pump to generate a negative supply rail that provides a clean, pop-free ground-biased audio signal.

The TPA6138A2 is available in a 14-pin TSSOP.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPA6138A2	TSSOP (14)	5.00 mm × 4.40 mm

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