NJW1105D

Overview

The NJW1105D is a dual audio power amplifier from Nisshinbo Micro Devices Inc., housed in a DIP-16 package. It delivers 1.2W per channel into an 8Ω load at 5V supply, with a total output of 2.4W. The device operates within a wide voltage range of 4V to 12V and utilizes Bi-MOS technology for low consumption. Key electrical parameters include a maximum supply current of 35mA when active and 3.5mA in mute mode. It features thermal protection, a mute function, and a voltage gain of 50dB typical.

Feature Summary

• Integrates Bi-MOS technology for efficient power delivery and low quiescent current consumption.
• Includes built-in thermal shutdown protection and a dedicated mute terminal for noise control.
• Supports flexible BTL (Bridge-Tied Load) configurations for higher power applications.

Applications

• Speaker amplifiers for personal computers
• Audio systems in camcorders
• Consumer electronics requiring high output power

Procurement Notes

Verify the specific package suffix matches the required footprint, as the NJW1105 series includes SSOP and SDMP variants alongside the DIP-16 configuration. Confirm that the design accounts for the thermal dissipation requirements associated with the DIP-16 package during operation. Ensure the mute pin biasing aligns with the specified voltage thresholds for proper activation and deactivation states.

Selection Notes

Select this component for designs requiring a dual-channel solution with moderate power output and integrated protection features. The wide operating voltage range allows compatibility with various single-supply systems. Consider the DIP-16 package for through-hole mounting needs or easier prototyping compared to surface-mount alternatives in the same family.

Part Context

This part belongs to the NJW1105 series of dual audio power amplifiers manufactured by Nisshinbo Micro Devices. The series offers multiple package options including SSOP-20 and SDMP-30 to suit different board space constraints while maintaining identical electrical performance characteristics across all form factors.

Replacement Considerations

Direct substitutes are not explicitly listed in the provided documentation. Designers should evaluate other dual audio amplifiers from the manufacturer's portfolio that offer similar power ratings and package dimensions if the NJW1105D is unavailable.

FAQ

What is the purpose of the MUTE pin?

The MUTE pin controls the amplifier's output state. Pulling it low mutes the outputs to reduce noise, while pulling it high activates the amplifier.

How does the device handle overheating?

The NJW1105D includes a built-in thermal protection circuit that shuts down the amplifier if the junction temperature exceeds safe limits.