TDA8946AJ/N2,112

Overview

The TDA8946AJ is a dual-channel audio power amplifier featuring Bridge-Tied Load (BTL) architecture with an all-NPN output stage. It delivers 2 x 15 W into an 8 Ω load at 18 V supply. The device includes DC gain control via a dedicated pin, allowing adjustment from +30 dB down to -50 dB for volume or preset functions. It operates within a supply voltage range of 4.5 V to 18 V and features standby/mute logic. The component is housed in a 17-pin DBS-17P plastic DIL-bent-SIL power package.

Feature Summary

• Integrated DC gain control pin for adjustable volume or preset gain settings
• Built-in protection mechanisms including thermal shutdown and short-circuit detection
• Three-level mode selection supporting standby, mute, and operating states
• High supply voltage ripple rejection capability for improved audio performance

Applications

• Mains-fed applications such as television sound systems
• Personal computer audio subsystems
• Portable audio equipment designs

Procurement Notes

Verify the current manufacturing status as this component may be discontinued. Confirm compatibility with existing PCB layouts due to the specific DBS-17P package dimensions. Ensure design requirements align with the specified operating temperature range and thermal dissipation needs.

Selection Notes

Select this amplifier for stereo BTL configurations requiring integrated gain control. Evaluate thermal management requirements carefully, as power dissipation depends on headroom and load impedance. Verify that the input coupling capacitors meet the cutoff frequency requirements for low-frequency response.

Part Context

This part belongs to the TDA8946 series of audio amplifiers. It is pin-compatible with the TDA8946J variant. The device is designed for use in consumer electronics where efficient power delivery and compact packaging are essential. It supports printed-circuit board compatibility with related models like the TDA8944AJ.

Replacement Considerations

The TDA8946J is confirmed as a pin-compatible alternative. Check datasheet revisions for any functional differences between variants before substitution.

FAQ

How is the gain adjusted on the TDA8946AJ?

The gain is adjusted using a DC control voltage applied to the GC pin. The range extends from +30 dB down to -50 dB.

What protection features are included?

The device includes short-circuit protection to ground, supply, and across the load, as well as thermal shutdown protection.