TS4604IPT

Overview

The TS4604IPT is a stereo ground-referenced output analog line driver and stereo headset driver manufactured by STMicroelectronics. It operates from a single supply voltage of 3 V to 4.8 V and features differential inputs with external gain setting resistors. The device integrates internal negative supplies to enable capless outputs, eliminating the need for bulky DC-blocking capacitors. It delivers up to 100 mW per channel into a 16 Ω load for the headset driver and drives 2 Vrms into loads of 5 kΩ or more for the line driver. The component is housed in a 28-TSSOP package.

Feature Summary

• Stereo headset driver delivering up to 100 mW into a 16 Ω load
• Ground-referenced stereo audio line driver driving 2 Vrms into ≥5 kΩ
• Integrated internal negative supply for capless output operation
• Dedicated shutdown control per function with low standby current

Applications

• PDP/LCD TV systems
• Set-top boxes
• Pre-amplifier circuits

Procurement Notes

Verify component status as the TS4604 is listed as an obsolete product. Confirm availability through authorized distributors or secondary markets. Ensure the ordering suffix IPT corresponds to the TSSOP28 package and Tape & Reel packaging format specified in local records.

Selection Notes

Select this component for applications requiring integrated headphone and line drive capabilities in a single package. Verify that the power supply voltage remains within the 3 V to 4.8 V range. Ensure external ceramic capacitors meet X5R dielectric requirements and appropriate voltage ratings (e.g., 10 V for 4.8 V operation) to account for DC bias capacitance loss.

Part Context

The TS4604 belongs to the Audio Special Purpose category within STMicroelectronics' portfolio. It is designed to reduce component count by integrating charge pumps for internal negative rails. The part is available in a 28-pin Thin Shrink Small Outline Package (TSSOP) with a 0.65 mm pitch.

Replacement Considerations

As the TS4604 is marked as obsolete, direct replacement parts are not explicitly documented in the provided source material. Designers should consult STMicroelectronics for current alternative audio driver solutions compatible with similar pinouts and specifications.

FAQ

How does the TS4604 eliminate the need for output DC-blocking capacitors?

The device embeds two internal negative supplies generated by charge pumps. This architecture centers the output voltage on 0 V, allowing the output swing to occur between positive and negative rails without external coupling capacitors.

What is the maximum output power for the headset driver?

The headset driver can deliver up to 100 mW per channel into a 16 Ω load.

What are the recommended capacitor values for the internal charge pumps?

Two flying capacitors (CHP and CLD) of 1 µF each and two tank capacitors (CPvss_HP and CPvss_LD) of 1 µF each are recommended. X5R dielectric capacitors with appropriate voltage ratings (e.g., 10 V for 4.8 V supply) are advised.