NJU8759AGM1-TE1

Overview

The NJU8759AGM1-TE1 is a monaural, filterless Class-D power amplifier manufactured by Nisshinbo Micro Devices. It operates on a single supply voltage ranging from 1.8V to 5.5V and delivers up to 1.7W into an 8Ω load or 3.0W into a 4Ω load at 5V with 10% THD+N. The device features analog differential input and PWM output, eliminating the need for external LC filters. Key electrical characteristics include a typical supply current of 2.7mA at 3.6V, a maximum standby current of 1μA, and a switching frequency between 100kHz and 395kHz. It is housed in an HSOP8 package.

Feature Summary

• Filterless architecture utilizing BTL output configuration to reduce external components and PCB size.
• Built-in pop noise reduction circuitry for both turn-on and turn-off sequences.
• Integrated protection mechanisms including overcurrent protection, thermal shutdown, and undervoltage lockout.
• Low standby current consumption of 1μa maximum for extended battery life in portable applications.

Applications

• Security equipment
• Portable electronic devices
• Portable audio systems

Procurement Notes

Verify the specific ordering suffix TE1 corresponds to the HSOP8 tape and reel packaging format containing 3000 units per reel. Confirm RoHS compliance and halogen-free status as specified in the manufacturer's ordering information table. Ensure the component matches the exact part number NJU8759AGM1-TE1 to guarantee correct marking and terminal finish specifications.

Selection Notes

Select this component for designs requiring high efficiency and minimal external passive components. The HSOP8 package provides superior heat dissipation compared to alternative packages like WCSP9, making it suitable for higher power outputs. Consider the operating temperature range of -40°C to 105°C for industrial or automotive environments. Evaluate thermal resistance requirements based on the specific PCB layer count and copper area available for heat spreading.

Part Context

This component belongs to the NJU8759A series of Class-D amplifiers designed for low-voltage, high-output applications. It serves as a solution for space-constrained portable electronics where traditional Class-D amplifiers would require bulky output filters. The HSOP8 variant offers robust thermal performance relative to smaller footprint options within the same product family.

Replacement Considerations

The datasheet identifies NJU8759WLC1 as a variation within the NJU8759/A series. This alternative utilizes a WCSP9 package instead of HSOP8, offering different thermal and spatial characteristics while maintaining similar functional parameters. Verify package compatibility and thermal management requirements when considering substitution.

FAQ

How does the NJU8759AGM1-TE1 handle input signals?

The device accepts analog differential signals at the INP and INN pins. It can also operate with single-ended inputs by applying a signal with twice the amplitude to the INP pin while connecting the INN pin to AC ground.

What is the function of the STBYB pin?

The STBYB pin controls the standby mode. A high voltage activates the amplifier, while a low voltage places it in standby mode with a maximum current consumption of 1μA. It includes a built-in 100kΩ pull-down resistor.

Does the NJU8759AGM1-TE1 require output LC filters?

No, the NJU8759AGM1-TE1 features a filterless output architecture. It generates PWM signals directly to the speaker without the need for external LC filters, reducing component count and PCB area.