Overview
The TS4990IST, produced by STMicroelectronics, is a 1.2 W audio power amplifier designed for demanding audio applications. It is particularly suited for devices such as mobile phones, laptops, and portable audio devices, where minimizing the number of external components is crucial. This amplifier delivers 1.2 W of continuous RMS output power into an 8 Ω load at 5 V, with a total harmonic distortion (THD) of 1% at 1 kHz. It features an externally controlled standby mode that reduces the supply current to less than 10 nA and includes internal thermal shutdown protection.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 2.2 to 5.5 | V |
| Output Power (Pout) at VCC = 5 V, THD = 1%, F = 1 kHz, RL = 8 Ω | 1.2 | W |
| Standby Current (ISTBY) | < 10 | nA |
| Power Supply Rejection Ratio (PSRR) at 217 Hz | 62 | dB |
| Total Harmonic Distortion + Noise (THD + N) at Pout = 1 Wrms, AV = 2, 20 Hz ≤ F ≤ 20 kHz, RL = 8 Ω | 0.1 | % |
| Operating Temperature Range | -40 to +85 | °C |
| Package | MiniSO-8 |
Key Features
- Operating range from VCC = 2.2 V to 5.5 V
- Ultra-low consumption in standby mode (less than 10 nA)
- Near-zero pop and click
- Ultra-low distortion (0.1%)
- Unity gain stable
- Available in various packages including miniSO-8, DFN8, and SO-8
- Internal thermal shutdown protection
- Externally controlled standby mode
- High power supply rejection ratio (PSRR) of 62 dB at 217 Hz
Applications
- Mobile phones (cellular / cordless)
- Laptop / notebook computers
- PDAs
- Portable audio devices
Q & A
- What is the maximum output power of the TS4990IST at 5 V?
The TS4990IST can deliver up to 1.2 W of continuous RMS output power into an 8 Ω load at 5 V.
- What is the standby current of the TS4990IST?
The standby current is less than 10 nA when the device is in standby mode.
- What is the power supply rejection ratio (PSRR) of the TS4990IST?
The PSRR is 62 dB at 217 Hz in grounded mode.
- What are the typical applications of the TS4990IST?
Typical applications include mobile phones, laptops, PDAs, and portable audio devices.
- What is the operating temperature range of the TS4990IST?
The operating temperature range is from -40°C to +85°C.
- What packages is the TS4990IST available in?
The TS4990IST is available in miniSO-8, DFN8, and SO-8 packages.
- Does the TS4990IST have thermal protection?
Yes, it includes internal thermal shutdown protection.
- How is the standby mode controlled in the TS4990IST?
The standby mode is externally controlled.
- What is the total harmonic distortion + noise (THD + N) of the TS4990IST?
The THD + N is 0.1% at Pout = 1 Wrms, AV = 2, 20 Hz ≤ F ≤ 20 kHz, RL = 8 Ω.
- Is the TS4990IST unity gain stable?
Yes, the TS4990IST is unity gain stable and can be configured by external gain setting resistors.
