Overview
The TPA6205A1 is a 1.25-W mono fully differential audio power amplifier designed by Texas Instruments. This device is optimized to drive speakers with at least 8-Ω impedance, making it suitable for various portable and battery-powered applications. It operates within a supply voltage range of 2.5 V to 5.5 V and consumes a low quiescent supply current of 1.7 mA. The amplifier is available in several compact packages, including the 2-mm × 2-mm MicroStar Junior BGA, 3-mm × 3-mm QFN, and 8-Pin PowerPAD MSOP, making it ideal for space-constrained designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Power | 1.25 W | @ 8 Ω, THD = 1%, VDD = 5 V |
| Supply Voltage | 2.5 V to 5.5 V | |
| Quiescent Supply Current | 1.7 mA | Typical |
| Shutdown Current | < 10 µA | |
| Operating Temperature Range | -40°C to 85°C | |
| Package Type | 8-TSSOP, 8-MSOP, MicroStar Junior BGA | |
| Number of Pins | 8 | |
| PSRR | 90 dB | From 90 Hz to 5 kHz |
| CMRR | -74 dB | 0.1% Resistor Tolerance, Gain = 4V/V, f = 20 Hz to 20 kHz |
Key Features
- 1.25 W output power into 8-Ω load from a 5-V supply at THD = 1% (Typical)
- Shutdown pin with 1.8-V compatible thresholds
- Low supply current: 1.7 mA Typical
- Shutdown current < 10 µA
- Only five external components required
- Improved PSRR (90 dB) and wide supply voltage range for direct battery operation
- Fully differential design reduces RF rectification and improves CMRR, eliminating the need for two input coupling capacitors
- Optional bypass capacitor due to fully differential design and high PSRR
- Fast start-up time of 4s with minimal pop
Applications
The TPA6205A1 is ideal for various applications, including:
- Wireless handsets due to its high PSRR, improved RF-rectification immunity, and small PCB area.
- PDA applications due to its fast start-up time and minimal pop.
- Portable and battery-powered devices where low power consumption and compact design are crucial.
Q & A
- What is the maximum output power of the TPA6205A1?
The TPA6205A1 can deliver up to 1.25 W of output power into an 8-Ω load from a 5-V supply at THD = 1% (Typical).
- What is the supply voltage range for the TPA6205A1?
The TPA6205A1 operates within a supply voltage range of 2.5 V to 5.5 V.
- What is the quiescent supply current of the TPA6205A1?
The quiescent supply current is 1.7 mA (Typical).
- What is the shutdown current of the TPA6205A1?
The shutdown current is less than 10 µA.
- What packages are available for the TPA6205A1?
The TPA6205A1 is available in 8-TSSOP, 8-MSOP, and MicroStar Junior BGA packages.
- What is the PSRR of the TPA6205A1?
The PSRR is 90 dB from 90 Hz to 5 kHz.
- Does the TPA6205A1 require input coupling capacitors?
No, the fully differential design and high CMRR eliminate the need for two input coupling capacitors.
- What is the operating temperature range of the TPA6205A1?
The operating temperature range is -40°C to 85°C.
- Is the bypass capacitor optional for the TPA6205A1?
Yes, the bypass capacitor is optional due to the fully differential design and high PSRR.
- What is the typical start-up time of the TPA6205A1?
The typical start-up time is 4s with minimal pop.
