Overview
The TS4962IQT is a differential class-D BTL power amplifier manufactured by STMicroelectronics. This device is designed to deliver high efficiency and low noise in audio applications. It can drive up to 2.2 W into a 4 Ω load and 1.4 W into an 8 Ω load at a supply voltage of 5 V, achieving an efficiency of 88% typical, which is significantly higher than standard AB-class audio amplifiers.
The amplifier features adjustable gain via external resistors, low current consumption, and a standby mode that reduces current consumption to 10 nA typical when activated. The TS4962IQT also includes pop and click reduction circuitry to minimize on/off switch noise and allows the device to start within 5 ms.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 2.4 to 5.5 | V |
| Common Mode Input Voltage Range (VIC) | 0.5 to VCC-0.8 | V |
| Load Resistor (RL) | ≥ 4 | Ω |
| Output Power at 5 V, THD = 1% max, RL = 4 Ω | 2.2 W | W |
| Output Power at 5 V, THD = 1% max, RL = 8 Ω | 1.4 W | W |
| Supply Current (ICC) at No Load | 2.3 to 3.3 | mA |
| Standby Current (ISTBY) | 10 to 1000 | nA |
| Output Offset Voltage (Voo) | 3 to 25 | mV |
| Signal to Noise Ratio (SNR) | 85 dB typical | dB |
| Power Supply Rejection Ratio (PSRR) | 63 dB typical at 217 Hz | dB |
| PWM Base Frequency | 280 kHz | kHz |
| Thermal Resistance Junction to Ambient (Rthja) | 50 °C/W | °C/W |
Key Features
- Operating voltage range from 2.4 V to 5.5 V
- Standby mode active low, reducing current consumption to 10 nA typical
- Adjustable gain via external resistors
- Low current consumption: 2 mA at 3 V
- High efficiency: 88% typical
- Signal to noise ratio: 85 dB typical
- Power supply rejection ratio: 63 dB typical at 217 Hz
- PWM base frequency: 280 kHz
- Low pop and click noise
- Available in DFN8 3 x 3 mm package
Applications
- Cellular phones
- PDAs
- Notebook PCs
Q & A
- What is the operating voltage range of the TS4962IQT?
The TS4962IQT operates from a supply voltage (VCC) of 2.4 V to 5.5 V.
- What is the maximum output power of the TS4962IQT at 5 V?
The TS4962IQT can deliver up to 2.2 W into a 4 Ω load and 1.4 W into an 8 Ω load at 5 V.
- How is the gain of the TS4962IQT controlled?
The gain of the TS4962IQT can be controlled via two external gain setting resistors.
- What is the standby current consumption of the TS4962IQT?
The standby current consumption is 10 nA typical when the standby mode is active.
- What is the efficiency of the TS4962IQT?
The TS4962IQT achieves an efficiency of 88% typical.
- What is the signal to noise ratio (SNR) of the TS4962IQT?
The signal to noise ratio is 85 dB typical.
- What is the power supply rejection ratio (PSRR) of the TS4962IQT?
The power supply rejection ratio is 63 dB typical at 217 Hz.
- What is the PWM base frequency of the TS4962IQT?
The PWM base frequency is 280 kHz.
- What package type is the TS4962IQT available in?
The TS4962IQT is available in a DFN8 3 x 3 mm package.
- What are some common applications of the TS4962IQT?
The TS4962IQT is commonly used in cellular phones, PDAs, and notebook PCs.
- How does the TS4962IQT reduce pop and click noise?
The TS4962IQT includes pop and click reduction circuitry to minimize on/off switch noise.
