Overview
The TS4621EIJT is a high-performance class-G stereo headphone amplifier produced by STMicroelectronics. This component is designed to deliver high audio performance, high power efficiency, and is particularly suited for space-constrained applications. It integrates a low power dissipation amplifier with a high-efficiency buck converter, which adjusts the voltage supply based on the amplitude of the audio signal to optimize power consumption. The TS4621EIJT features an I2C interface for volume control, ensuring precise and flexible volume adjustment. It is ideal for use in cellular phones, smartphones, mobile internet devices, and PMP/MP3 players.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.3 to 4.8 | V |
| Quiescent Current per Channel | 0.6 | mA |
| Current Consumption at 100 µW/channel (10 dB crest factor) | 2.1 | mA |
| THD+N at 1 kHz | 0.006% (typical), 0.02% (maximum) | % |
| PSRR at 217 Hz | 100 | dB |
| SNR A-weighted at G = 0 dB | 100 | dB |
| Load Resistor | ≥ 16 Ω | Ω |
| Load Capacitor | 0.8 to 100 nF | nF |
| Operating Temperature Range | -40 to +85 | °C |
| Package Type | 16-bump flip-chip package, 1.65 mm x 1.65 mm, 400 µm pitch |
Key Features
- I2C interface for volume control with a range from -60 dB to +4 dB
- Independent right and left channel shutdown control
- Integrated high-efficiency buck converter
- Low software standby current: 5 µA max
- No output-coupling capacitors required
- Thermal shutdown and short-circuit protection
- Zero pop and click
- Dedicated common-mode sense pin to remove parasitic ground noise
Applications
- Cellular phones and smartphones
- Mobile internet devices
- PMP/MP3 players
Q & A
- What is the supply voltage range for the TS4621EIJT? The supply voltage range is from 2.3 V to 4.8 V.
- What is the quiescent current per channel for the TS4621EIJT? The quiescent current per channel is 0.6 mA.
- What is the current consumption at 100 µW/channel with a 10 dB crest factor? The current consumption is 2.1 mA.
- What is the typical THD+N at 1 kHz for the TS4621EIJT? The typical THD+N at 1 kHz is 0.006%, with a maximum of 0.02%.
- What is the PSRR at 217 Hz for the TS4621EIJT? The PSRR at 217 Hz is 100 dB.
- Does the TS4621EIJT require output-coupling capacitors? No, the TS4621EIJT does not require output-coupling capacitors.
- What is the operating temperature range for the TS4621EIJT? The operating temperature range is from -40°C to +85°C.
- What type of package does the TS4621EIJT come in? The TS4621EIJT comes in a 16-bump flip-chip package with a size of 1.65 mm x 1.65 mm and a pitch of 400 µm.
- What is the purpose of the integrated buck converter in the TS4621EIJT? The integrated buck converter adjusts the voltage supply based on the amplitude of the audio signal to optimize power consumption.
- Does the TS4621EIJT have thermal and short-circuit protection? Yes, the TS4621EIJT has thermal shutdown and short-circuit protection.
