NJU8754V-TE2

Overview

The NJU8754V is a discontinued monaural Class D power amplifier from Nisshinbo Micro Devices. It operates on a supply voltage of 2.7 to 5.25V and delivers up to 1.2W into an 8-ohm load at 5V, or 0.6W at 3.6V. The device features a BTL output configuration that eliminates the need for AC coupling capacitors. Electrical characteristics include a typical voltage gain of 23 dB, an efficiency of 83% at 10% THD, and a standby current of 1 µA. It utilizes CMOS technology and is available in SSOP10 and QFN20-M1 packages.

Feature Summary

• Monaural analog signal input with BTL output architecture
• Integrated short protector and low voltage detector
• Supports standby and mute control functions
• Designed for high power efficiency via Class-D operation

Applications

• Cellular phones
• Personal Digital Assistants (PDA)
• Portable audio devices

Procurement Notes

The NJU8754V is officially designated as a discontinued product by Nisshinbo Micro Devices. Verification of availability should focus on identifying valid replacement components within the same family or equivalent specifications. Sourcing this specific part number may require checking secondary markets or confirming if alternative package variants like the NJU8754KM1 are suitable substitutes for existing designs.

Selection Notes

Select this component only if legacy compatibility is required, as it is no longer recommended for new designs. Ensure the application supports the necessary external LC filtering for the Class-D output stage. Verify that the system power supply can maintain the required VDDO stability for optimal THD performance. Consider thermal dissipation limits when operating near maximum power ratings.

Part Context

This component belongs to the NJU8754 series of analog signal input monaural Class D power amplifiers. It is manufactured using CMOS technology by Nisshinbo Micro Devices. The series includes variations such as the NJU8754KM1, which shares similar functional characteristics but may differ in package type. The NJU8754V specifically refers to the version associated with the discontinued status noted in the datasheet.

Replacement Considerations

The datasheet explicitly lists the NJU3555 as a related part. Designers should evaluate the NJU3555 or other current Nisshinbo audio amplifier offerings as potential replacements for the discontinued NJU8754V.

FAQ

What is the function of the Low Voltage Detector?

When the power supply voltage drops below the minimum threshold, the internal oscillation halts to prevent unwanted frequency generation, and the output terminals enter a high impedance state.

How does the Short Protection Circuit operate?

It protects against instantaneous shorts between outputs or to ground by turning off the output driver. Normal operation typically resumes after approximately 5 seconds.

What is the purpose of the MUTEB terminal?

Setting the MUTEB terminal to a low level enables the mute function, causing the output terminals to output a square wave with a 50% duty cycle.