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Product Detailed Parameters
- Description：IC AMP AB DUAL/QUAD 25FLEXIWATT
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Type：Class AB
- Output Type：2-Channel (Stereo) or 4-Channel (Quad)
- Max Output Power x Channels @ Load：32W x 2 @ 4Ohm; 9.5W x 4 @ 4Ohm
- Voltage - Supply：-
- Features：Depop, Mute, Short-Circuit and Thermal Protection, Standby
- Mounting Type：Through Hole
- Supplier Device Package：25-Flexiwatt (Vertical)
- Package / Case：25-Flexiwatt, Formed Leads
- Operating Temperature：-40°C ~ 150°C (TJ)
- Grade：-
- Qualification：-
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Overview
The TDA7451 is a quad bridge car radio power amplifier featuring triple integrated power supply regulators. It delivers up to 4x9.5W or 2x32W at 4Ω with THD=10%. Operating voltage ranges from 8V to 18V, with peak supply tolerance of 40V. The device includes built-in 5V (150mA/500mA) and 8.5V (200mA) regulators with diagnostic features. Key electrical parameters include 20dB fixed gain, 100kHz bandwidth, and 150mA quiescent current. Thermal resistance junction-to-case is 1.2°C/W.
Feature Summary
- Integrated triple power supply providing regulated 5V and 8.5V outputs for system control
- Minimized external component count by eliminating decoupling, bootstrap, and compensation capacitors
- Comprehensive protection suite including load dump, thermal warning, clipping detection, and short circuit monitoring
- Diagnostic output indicating under-voltage, drop sense, short circuit, and over-temperature conditions
Applications
- Car radio power amplification systems
- Automotive audio setups requiring integrated voltage regulation
- Single-supply BTL or SE audio configurations
Procurement Notes
Verify component status as the TDA7451 is listed as obsolete. Confirm availability through authorized distributors or secondary markets. Ensure compatibility with existing Flexiwatt25 mounting infrastructure. Review preliminary data specifications for any potential parameter variations compared to final production units.
Selection Notes
Select this component for designs requiring integrated power regulation alongside audio amplification. The internally fixed 20dB gain simplifies circuit design by removing external resistor networks. Suitable for applications needing robust automotive protections like load dump handling. Verify that the single-ended or bridge-tied load configuration matches the speaker impedance requirements.
Part Context
This part belongs to STMicroelectronics' automotive Class-AB audio amplifier portfolio. It utilizes BCD technology for high power density. The Flexiwatt25 package facilitates efficient heat dissipation in confined automotive environments. It serves as a solution for reducing bill-of-materials complexity in car radio designs.
Replacement Considerations
Check for pin-compatible alternatives within the TDA74xx series. Verify if newer models offer updated regulatory compliance or improved efficiency metrics.
