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231,795 pcs
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231795 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The Texas Instruments TPA6138A2PW is a DirectPath Technology based headphone driver IC designed for pop-free stereo audio applications. It offers adjustable gain functionality and features a built-in active-mute control for seamless audio on/off transitions. An under-voltage detector ensures a pop-free output shutdown when the power supply is removed.
This amplifier is designed to eliminate the need for output DC-blocking capacitors, significantly reducing component count and production costs. It can drive a 32-Ohm load from a 3.3V supply voltage, delivering up to 40mW of power with low THD+N of less than 0.01% at 10mW into 32 Ohms. The load impedance can range from a minimum of 16 Ohms to a nominal 32 Ohms.
The TPA6138A2PW integrates a charge pump to generate a negative supply rail, enabling pop-free, ground-biased audio signals without requiring a split-rail power supply. The gain can be individually set using an external resistor. The audio output complies with ±8-kV IEC ESD protection, requiring only a simple resistor-capacitor ESD protection circuit for interfacing with PWM-based audio sources.
This headphone driver operates within a supply voltage range of 3V to 3.6V, with a nominal voltage of 3.3V. Its design considerations include reducing component count and BOM cost, making it suitable for various portable audio devices.
| Qty | Low | High |
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| 1+ | $0.63 | $0.63 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The TPA6138A2PW can deliver up to 40mW into a 32 Ohm load with a 3.3V supply.
The TPA6138A2PW operates with a supply voltage ranging from 3V to 3.6V, with a nominal value of 3.3V.
The TPA6138A2PW supports a minimum load impedance of 16 Ohms.
The THD+N is less than 0.01% at 10mW into a 32 Ohm load.
No, the TPA6138A2PW features ground-referenced outputs that eliminate the need for output DC blocking capacitors.
The TPA6138A2PW audio output complies with ±8-kV IEC ESD protection.