Overview
The TPA4860DR is a 1-W, mono, Class-AB audio power amplifier produced by Texas Instruments. This amplifier is designed in a bridge-tied load (BTL) configuration, enabling it to deliver 1 W of continuous average power into an 8-Ω load at 0.4% THD+N from a 5-V power supply in voiceband frequencies (f < 5 kHz). It is available in a 16-pin SOIC surface-mount package, which reduces board space and facilitates automated assembly. The TPA4860DR is notable for its shutdown control, headphone interface logic, and internal thermal and short-circuit protection, making it suitable for a variety of audio applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 16-pin SOIC (D) | |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage | 2.7 V to 5.5 V | V |
| Output Power (THD = 0.2%, f = 1 kHz, AV = 2) | 1 W | |
| Load Resistance | 4 Ω to 16 Ω | Ω |
| Quiescent Current (Typical) | 3.5 mA | mA |
| Quiescent Current in Shutdown Mode | 0.6 µA | µA |
| Supply Ripple Rejection Ratio (at 1 kHz) | 56 dB | dB |
| Noise Output Voltage (Gain = 2, 20 Hz to 20 kHz) | 20 µV | µV |
Key Features
- 1-W BTL Output (5 V, 0.2 % THD+N)
- 3.3-V and 5-V Operation
- No Output Coupling Capacitors Required
- Shutdown Control (IDD = 0.6 µA)
- Headphone Interface Logic
- Uncompensated Gains of 2 to 20 (BTL Mode)
- Surface-Mount Packaging
- Thermal and Short-Circuit Protection
- High Power Supply Rejection (56-dB at 1 kHz)
- LM4860 Drop-In Compatible
Applications
The TPA4860DR is suitable for various audio applications, including portable audio devices, battery-powered audio equipment, and systems requiring low power consumption and high audio quality. Its headphone interface logic makes it particularly useful in devices that need to switch between speaker and headphone outputs. Additionally, its thermal and short-circuit protection features enhance reliability in demanding environments.
Q & A
- What is the maximum output power of the TPA4860DR?
The TPA4860DR can deliver up to 1 W of continuous average power into an 8-Ω load at 0.4% THD+N from a 5-V power supply. - What is the operating temperature range of the TPA4860DR?
The operating temperature range is -40°C to 85°C. - What is the supply voltage range for the TPA4860DR?
The supply voltage range is 2.7 V to 5.5 V. - Does the TPA4860DR require external coupling capacitors?
No, the BTL configuration eliminates the need for external coupling capacitors on the output in most applications. - What is the quiescent current in shutdown mode?
The quiescent current in shutdown mode is 0.6 µA. - What kind of protection does the TPA4860DR have?
The TPA4860DR has internal thermal and short-circuit protection. - Is the TPA4860DR compatible with other models?
Yes, it is LM4860 drop-in compatible. - What is the package type of the TPA4860DR?
The TPA4860DR is available in a 16-pin SOIC surface-mount package. - What is the noise output voltage of the TPA4860DR?
The noise output voltage is 20 µV (Gain = 2, 20 Hz to 20 kHz). - What are some common applications of the TPA4860DR?
Common applications include portable audio devices, battery-powered audio equipment, and systems requiring low power consumption and high audio quality.
