Overview
The TS4871IST, produced by STMicroelectronics, is a high-performance audio power amplifier designed for a wide range of portable and mobile applications. This device is capable of delivering 1 W of continuous RMS output power into an 8 Ω load at a supply voltage of 5 V, with a total harmonic distortion (THD) of 0.1%. The TS4871IST operates from a supply voltage range of 2.5 V to 5.5 V, making it versatile for various power sources. It features ultra-low consumption in standby mode, with a current as low as 10 nA, and includes internal thermal shutdown protection for reliability.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage) | 2.5 | - | 5.5 | V |
| PO (Output Power) @ THD = 1%, f = 1 kHz, RL = 8 Ω | - | - | 1 | W |
| THD + N (Total Harmonic Distortion + Noise) @ PO = 250 mWrms, Gv = 2, 20 Hz < f < 20 kHz, RL = 8 Ω | - | - | 0.15% | % |
| PSRR (Power Supply Rejection Ratio) @ f = 217 Hz, RL = 8 Ω, RFeed = 22 kΩ, Vripple = 200 mVrms | - | - | 75 | dB |
| ICC (Supply Current) No input signal, no load @ VCC = 5 V | 6 | 8 | - | mA |
| ISTANDBY (Standby Current) No input signal, VSTDBY = VCC, RL = 8 Ω | 10 | - | 1000 | nA |
| ϕM (Phase Margin) at unity gain, RL = 8 Ω, CL = 500 pF | 70 | - | - | Degrees |
| GM (Gain Margin) RL = 8 Ω, CL = 500 pF | 20 | - | - | dB |
| GBP (Gain Bandwidth Product) RL = 8 Ω | - | - | 2 | MHz |
Key Features
- Operating from VCC = 2.5 V to 5.5 V, making it suitable for various power sources.
- 1 W rail-to-rail output power @ VCC = 5 V, THD = 1%, f = 1 kHz, with 8 Ω load.
- Ultra-low consumption in standby mode (10 nA), reducing power consumption when not in use.
- High power supply rejection ratio (PSRR) of 75 dB @ 217 Hz, ensuring minimal noise from the power supply.
- Ultra-low pop and click noise, enhancing audio quality.
- Ultra-low distortion (0.1%) for high-quality audio output.
- Unity gain stable, allowing for simple configuration with external gain setting resistors.
- Internal thermal shutdown protection for reliability and safety.
- Available in SO8 and MiniSO8 packages, offering flexibility in design.
Applications
- Mobile phones (cellular / cordless)
- Laptop / notebook computers
- PDAs (Personal Digital Assistants)
- Portable audio devices
Q & A
- What is the maximum output power of the TS4871IST?
The TS4871IST can deliver up to 1 W of continuous RMS output power into an 8 Ω load at a supply voltage of 5 V.
- What is the operating voltage range of the TS4871IST?
The TS4871IST operates from a supply voltage range of 2.5 V to 5.5 V.
- What is the standby current of the TS4871IST?
The standby current of the TS4871IST is as low as 10 nA when in standby mode.
- What is the power supply rejection ratio (PSRR) of the TS4871IST?
The PSRR of the TS4871IST is 75 dB at 217 Hz.
- What is the total harmonic distortion (THD) of the TS4871IST?
The THD of the TS4871IST is 0.1% at PO = 250 mWrms, Gv = 2, 20 Hz < f < 20 kHz, RL = 8 Ω.
- Is the TS4871IST unity gain stable?
Yes, the TS4871IST is unity gain stable and can be configured with external gain setting resistors.
- What are the available packages for the TS4871IST?
The TS4871IST is available in SO8 and MiniSO8 packages.
- What are some common applications of the TS4871IST?
The TS4871IST is commonly used in mobile phones, laptop/notebook computers, PDAs, and portable audio devices.
- Does the TS4871IST have internal thermal shutdown protection?
Yes, the TS4871IST includes internal thermal shutdown protection for reliability and safety.
- How does the TS4871IST minimize external components?
The TS4871IST is designed to minimize the number of external components required, making it suitable for high-quality audio applications with simplified designs.
