NJW1105M

Overview

The NJW1105M is a dual audio power amplifier from Nisshinbo Micro Devices Inc., designed for high-output applications. It delivers 1.2W per channel into 8Ω loads at a 5V supply, utilizing Bi-MOS technology for low consumption. The device operates within a wide voltage range of 4V to 12V and includes thermal protection and mute functions. Key electrical characteristics include a maximum supply current of 35mA in operation and 3.5mA in mute mode. It features a voltage gain of 50dB typical and a power supply rejection ratio of 45dB.

Feature Summary

• Integrates Bi-MOS technology for efficient power delivery with low supply current consumption.
• Includes built-in thermal protection circuitry to safeguard against overheating conditions.
• Features a dedicated mute input terminal for controlling audio output states.

Applications

• Speaker amplifiers for personal computers
• Audio output stages for camcorders

Procurement Notes

Verify the specific package variant required, as the NJW1105 family includes DIP16, SDMP30, and SSOP20-F1 options. Confirm that the 'M' suffix corresponds to the desired physical footprint before ordering. Ensure design compatibility with the specified operating temperature range of -40°C to +85°C. Check for any RoHS compliance documentation if environmental regulations apply to the target assembly.

Selection Notes

Select this component when a dual-channel solution is needed for driving 8Ω speakers directly from a single supply rail between 4V and 12V. It is appropriate for designs requiring integrated thermal shutdown without external discrete protection components. Consider the SSOP20 or DIP16 packages based on available board space and mounting preferences. Evaluate the 50dB voltage gain to determine if additional signal conditioning is necessary for the source interface.

Part Context

This part belongs to the NJW1105 series of dual audio power amplifiers manufactured by Nisshinbo Micro Devices. The series utilizes Bi-MOS technology to balance performance and power efficiency. Other variants in the lineup offer different package outlines such as SDMP30 and DIP16, providing flexibility for various PCB layout requirements while maintaining identical electrical specifications.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.