Overview
The TS4871IDT is an audio power amplifier produced by STMicroelectronics, designed to deliver high-quality audio performance in a variety of portable and mobile applications. This amplifier 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% at 1 kHz. It operates over a supply voltage range of 2.5 V to 5.5 V, making it versatile for different power sources.
The TS4871IDT features ultra-low consumption in standby mode, reducing the supply current to less than 10 nA, and includes internal thermal shutdown protection for reliability. The amplifier is unity-gain stable and can be configured using external gain-setting resistors, minimizing the need for additional external components.
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 mW, 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 |
| GBP (Gain Bandwidth Product) @ RL = 8 Ω | - | - | 2 | MHz |
Key Features
- Operating from VCC = 2.5 V to 5.5 V
- 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 (less than 10 nA)
- 75 dB PSRR @ 217 Hz from 5 V to 2.6 V
- Ultra-low pop and click
- Ultra-low distortion (0.1%)
- Unity gain stable
- Available in SO8 and MiniSO8 packages
- Internal thermal shutdown protection
- External standby mode control
Applications
- Mobile phones (cellular / cordless)
- Laptop / notebook computers
- PDAs
- Portable audio devices
Q & A
- What is the maximum output power of the TS4871IDT?
The TS4871IDT 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 typical supply current of the TS4871IDT?
The typical supply current is 8 mA when there is no input signal and no load at VCC = 5 V.
- How low is the standby current of the TS4871IDT?
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 TS4871IDT?
The PSRR is 75 dB at 217 Hz with a supply voltage range from 5 V to 2.6 V.
- What are the package options for the TS4871IDT?
The TS4871IDT is available in SO8 and MiniSO8 packages.
- Does the TS4871IDT have thermal protection?
Yes, the TS4871IDT includes internal thermal shutdown protection.
- What is the gain bandwidth product (GBP) of the TS4871IDT?
The GBP is 2 MHz at RL = 8 Ω.
- Is the TS4871IDT unity-gain stable?
Yes, the TS4871IDT is unity-gain stable.
- What are the typical applications of the TS4871IDT?
The TS4871IDT is typically used in mobile phones, laptop/notebook computers, PDAs, and portable audio devices.
- How does the TS4871IDT minimize external components?
The TS4871IDT is designed to minimize the number of external components by allowing configuration using external gain-setting resistors.
