TS4601BEIJT

Overview

The TS4601BEIJT is a stereo headphone amplifier featuring capacitorless outputs and an I2C bus interface. It operates within a power supply range of 2.9 V to 5.5 V, delivering 0.9 Vrms into 16 Ω and 1.6 Vrms into 10 kΩ loads. The device provides a digital volume control range from -60 dB to +4 dB with 64 steps. Key electrical specifications include a typical PSRR of 107 dB at 217 Hz, an A-weighted SNR of 101 dB, and a quiescent current of 4.8 mA at 3.0 V. Standby current is limited to 2 µA maximum.

Feature Summary

• Capacitorless output design eliminates the need for traditional output-coupling capacitors.
• Integrated I2C interface enables digital volume control and multiple configuration modes.
• Common-mode sense pin removes parasitic noise between the jack ground and device ground.
• Independent right and left channel shutdown control supports low-power standby operation.

Applications

• Cellular phones
• Notebook computers
• CD/MP3 players

Procurement Notes

Verify the specific ordering suffix 'EIJT' corresponds to the 16-bump flip-chip package with a 500 µm pitch as documented in the datasheet. Confirm that the component meets the required operating temperature range of -40°C to +85°C. Ensure the design accommodates the mandatory minimum series output resistor of 12 Ω for unconditional stability with capacitive loads. Check for any end-of-life notifications or alternative sourcing requirements given the component's age.

Selection Notes

Select this component for space-constrained applications requiring high audio performance without external output capacitors. It is suitable for designs needing precise digital volume adjustment via I2C rather than analog potentiometers. Consider the low standby current for battery-powered devices where power efficiency is critical. Ensure the PCB layout allows for close placement of decoupling capacitors to minimize parasitic inductance.

Part Context

The TS4601B is a stereo headphone driver designed for high audio performance in mobile and portable electronics. It replaces the TS4601 model while offering improved ESD ratings and enhanced power supply rejection ratio. The device utilizes low power dissipation amplifier core technology to achieve superior signal-to-noise ratios and minimal distortion across various load conditions.

Replacement Considerations

The TS4601B is explicitly stated to replace the TS4601. Verify compatibility regarding the improved ESD ratings and identical functional pinout if substituting directly. No other substitute part numbers are confirmed in the provided documentation.

FAQ

How does the TS4601B eliminate parasitic noise from the headphone jack?

It uses a dedicated common-mode sense (CMS) pin connected to the headphone jack ground. This pin senses potential differences between the jack ground and the device ground, allowing the circuit to remove this noise from the outputs.

What is the purpose of the output serial resistor?

The TS4601B is designed to be used with an output serial resistor (minimum 12 Ω). This ensures unconditional stability over a wide range of capacitive loads.

Can the channels be controlled independently?

Yes, the device features independent right and left channel shutdown control, allowing individual channels to be disabled to save power.