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Product Detailed Parameters
- Description：IC AMP AB QUAD 75W 25FLEXIWATT
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Type：Class AB
- Output Type：4-Channel (Quad)
- Max Output Power x Channels @ Load：75W x 4 @ 2Ohm
- Voltage - Supply：8V ~ 18V
- Features：Mute, Short-Circuit and Thermal Protection, Standby
- Mounting Type：Through Hole
- Supplier Device Package：25-Flexiwatt (Horizontal)
- Package / Case：25-Flexiwatt, Formed Leads
- Operating Temperature：150°C (TJ)
- Grade：-
- Qualification：-
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Overview
The TDA7851FH-QIX is a Class AB audio power amplifier utilizing Multipower BCD technology, designed for high-power car radio applications. It features a fully complementary P-Channel/N-Channel MOSFET output structure enabling rail-to-rail voltage swing. The device delivers up to 4 x 48 W into 4 Ω loads and 4 x 72 W into 2 Ω loads. Key electrical characteristics include an internally fixed gain of 26 dB, operation within a supply voltage range of 8.0 V to 18.0 V, and an operating temperature range from -40°C to 105°C.
Feature Summary
- MOSFET output power stage with excellent low impedance driving capability
- Low external component count due to internally fixed gain and no need for bootstrap capacitors
- Comprehensive protection suite including soft thermal limiter, load dump, and reversed battery protection
Applications
- High-power automotive radio systems
- Car audio amplification
- Vehicle infotainment sound processing
Procurement Notes
Verify the specific suffix FH-QIX against official STMicroelectronics documentation to confirm exact packaging and automotive qualification status. Ensure compatibility with Flexiwatt 25 mounting requirements. Cross-reference datasheet revisions to validate current production status and pinout configurations before integration.
Selection Notes
Select this component for designs requiring high efficiency and minimal external passive components in automotive environments. The integrated protections simplify thermal management and fault handling. Verify that the system's power supply can sustain the required voltage levels for the desired output power classes.
Part Context
This part belongs to the TDA785x family of quad bridge power amplifiers. It shares architectural similarities with the TDA7850 and TDA7851L but may differ in specific package variants or automotive grade certifications. The family is characterized by its ability to drive low-impedance loads efficiently using advanced BCD technology.
Replacement Considerations
The TDA7851L is a documented variant within the same product line. Verify if the QIX suffix denotes a specific automotive qualification or packaging difference compared to standard versions. Check pinout compatibility before substitution.
