NCP4894DMR2

Overview

The NCP4894DMR2 is a differential audio power amplifier designed for portable communication devices. It delivers 1.0 W to an 8-ohm load from a 5.0 V supply with less than 0.01% distortion, and up to 1.8 W at 5.5 V with 10% THD+N. Operating voltage ranges from 2.2 V to 5.5 V. The device features selectable shutdown logic, pop-and-click noise protection, and thermal overload protection. It utilizes a Micro-10 package.

Feature Summary

• Differential amplification architecture eliminates the need for output coupling capacitors
• Selectable shutdown mode allows configuration via high or low logic signals
• Integrated circuitry prevents audible pop and click noises during power transitions
• High power supply rejection ratio enables direct connection to battery sources

Applications

• Portable electronic devices
• Personal digital assistants (PDAs)
• Mobile phones

Procurement Notes

Verify the specific suffix 'DMR2' corresponds to the Micro-10 package variant. Confirm lead-free status if required by checking for the 'G' suffix designation in ordering information. Ensure compatibility with surface mount assembly processes specified for this package type. Validate that the application circuit supports the required gain setting resistors and bypass capacitor values for optimal performance.

Selection Notes

Select this component when a compact differential audio solution is required for battery-powered systems. The Micro-10 package offers space efficiency compared to larger alternatives. Consider the external gain configuration capability for system flexibility. Verify that the operating voltage range of 2.2 V to 5.5 V aligns with the target power supply rails. Evaluate thermal requirements based on the expected output power and PCB heatsink area.

Part Context

This part belongs to the NCP4894 family of 1.8 Watt differential audio power amplifiers. Other variants include the 9-Pin Flip-Chip (FC) and DFN10 (MN) packages. The family shares core functionality but differs in physical footprint and thermal characteristics. The DM suffix specifically denotes the Micro-10 package configuration.

Replacement Considerations

NCP4894DMR2G is the lead-free version of this component. Direct substitutes from other manufacturers are not explicitly confirmed in the provided documentation.