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Product Detailed Parameters
- Description：IC AMP D MONO/STEREO 420W 24HSOP
- Series：-
- Mfr：NXP USA Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Class D
- Output Type：1-Channel (Mono) or 2-Channel (Stereo)
- Max Output Power x Channels @ Load：420W x 1 @ 8Ohm, 210W x 2 @ 4Ohm
- Voltage - Supply：±12.5V ~ 42.5V
- Features：Depop, Differential Inputs, Mute, Short-Circuit Protection
- Mounting Type：Surface Mount
- Supplier Device Package：24-HSOP
- Package / Case：24-BSOP (0.433", 11.00mm Width) Exposed Pad
- Operating Temperature：-40°C ~ 85°C (TA)
- Grade：-
- Qualification：-
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Overview
The TDA8953TH/N1,118 is a stereo or mono high-efficiency Class D audio power amplifier by NXP Semiconductors. It delivers up to 2 × 210 W into a 4 Ω load in stereo single-ended mode, or 1 × 420 W into an 8 Ω load in mono bridge-tied load configuration. Operating over a wide supply voltage range from ±12.5 V to ±42.5 V, it features low quiescent current consumption and approximately 93% efficiency. The device includes advanced protection strategies such as thermal foldback, overcurrent limiting, and short-circuit proof outputs.
Feature Summary
- High output power capability with approximately 93% efficiency
- Stereo full differential inputs supporting SE or BTL configurations
- Advanced protection strategy including thermal foldback and overcurrent limiting
- Smooth pop noise-free start-up and switch-off functionality
Applications
- DVD systems
- Home Theater In A Box (HTIAB) systems
- Mini and micro receivers
- High-power speaker systems
- Public Address (PA) systems
Procurement Notes
Verify the specific ordering suffix for packaging details. Confirm availability status as manufacturing changes occur. Ensure compatibility with existing system voltage rails and thermal management requirements before integration.
Selection Notes
Select this component for applications requiring high power density and audiophile sound quality comparable to Class AB amplifiers. Consider the HSOP24 package for heatsink mounting. Evaluate external clock synchronization needs if multiple units are used in one system to avoid beat tones.
Part Context
This part belongs to the TDA895x series of Class D power amplifiers. It shares architectural similarities with the TDA8950 and TDA8954 but offers distinct power ratings and pin configurations tailored for high-performance audio applications.
Replacement Considerations
Official substitute part numbers are not explicitly confirmed in the provided datasheet text. Consult NXP documentation for qualified replacements.
FAQ
How is the carrier frequency determined?
The carrier frequency is set by an external resistor connected between pins OSC and OSCREF. A 30 kΩ resistor typically sets the frequency to 335 kHz.
What happens during Thermal FoldBack activation?
If the junction temperature exceeds approximately 145 °C, the gain is gradually reduced to lower output signal amplitude and power dissipation, stabilizing the temperature.
