NJM2770RB1-TE1#

Overview

The NJM2770RB1-TE1 is a high-power, low-voltage audio power amplifier manufactured by Nisshinbo Micro Devices. It operates within a supply voltage range of +2V to +4.5V and delivers typical output powers of 250mW at 3V into an 8Ω load, or 400mW at 4.5V into a 16Ω load. The device features a differential output architecture that eliminates the need for external coupling capacitors. Key electrical parameters include a typical operating current of 2.0mA and a standby current of 0.1µA. It utilizes MSOP8 (TVSP8) packaging and supports a gain range of 0dB to 43dB.

Feature Summary

• Differential output configuration removes the requirement for external coupling capacitors
• Integrated thermal shutdown function protects against overheating
• Low standby current consumption of 0.1µA in power-down mode
• Adjustable closed-loop gain via two external resistors

Applications

• Cellular phone speaker amplifiers
• Hands-free system speaker amplifiers
• Codeless telephone audio circuits
• PCS audio applications

Procurement Notes

Verify the specific package variant during procurement, as the NJM2770 series includes both standard VSP8 and thin TVSP8 configurations. Confirm that the ordering suffix matches the required JEDEC MO-187-DA compliance. Ensure the component meets RoHS standards if applicable to your manufacturing process. Cross-reference the datasheet revision date with your design requirements to confirm compatibility with existing schematics.

Selection Notes

Select this component when designing low-voltage audio systems requiring high efficiency without bulky output capacitors. The differential output topology simplifies PCB layout compared to single-ended designs. Consider the 0.1µA standby current for battery-operated devices where power conservation is critical. Verify that the load impedance falls within the specified 4Ω to 200Ω range for optimal performance.

Part Context

This part belongs to the NJM2770 family of audio power amplifiers designed for portable electronics. The RB1 suffix typically denotes the TVSP8 package variant, which is a thin-type MSOP8 meeting JEDEC MO-187-DA standards. This distinguishes it from the standard VSP8 package found in other variants like the NJM2770R. The family focuses on balancing high power output with minimal current draw.

Replacement Considerations

Direct substitutes must match the 2V-4.5V supply range, differential output type, and MSOP8/TVSP8 package. Verify pinout compatibility, specifically the Chip Disable (CD) pin location and thermal pad configuration. Ensure replacement parts support the same 400mW output capability at 4.5V into 16Ω loads.