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The TDA7850A is a breakthrough MOSFET technology class AB audio power amplifier in Flexiwatt27 package designed for high power car radio. The fully complementary P-Channel/N-Channel output structure allows a rail to rail output voltage swing which, combined with high output current and minimized saturation losses sets new power references in the car-radio field, with unparalleled distortion performances.
The TDA7850A integrates a DC offset detector.
Key Features
- High output power capability:
- 4 x 50 W/4 Ω max.
- 4 x 30 W/4 Ω @ 14.4 V, 1 kHz, 10 %
- 4 x 80 W/2 Ω max.
- 4 x 55 W/2 Ω @ 14.4 V, 1 kHz, 10 %
- MOSFET output power stage
- Excellent 2 Ω driving capability
- Hi-fi class distortion
- Low output noise
- Standby function
- Mute function
- Automute at min. supply voltage detection
- Low external component count:
- Internally fixed gain (26 dB)
- No external compensation
- No bootstrap capacitors
- On board 0.35 A high side driver
- Protections:
- Output short circuit to GND, to Vs, across the load
- Very inductive loads
- Overrating chip temperature with soft thermal limiter
- Output DC offset detection
- Load dump voltage
- Fortuitous open gnd
- Reversed battery
- ESD
- High output power capability:
Featured Videos
Power amplifier system for automotive applications
Evaluation Tools
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Picture Part number Manufacturer Description 
EVAL-TDA785X ST EVAL-TDA785x evaluation board for STPA001, STPA003, STPA008, TDA7851A, TDA7850A, and TDA7388A Part NumberEVAL-TDA785x evaluation board for STPA001, STPA003, STPA008, TDA7851A, TDA7850A, and TDA7388A
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| TDA7850A | Active | FLEXIWATT FM2 27 | Automotive | Ecopack2 | |
| TDA7850AH | Active | FLEXIWATT 27 HB | Automotive | Ecopack2 | |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Marketing Status | Package | Packing Type | ECCN (US) | Country of Origin | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|
| TDA7850A | 3 distributors | Buy now | Active | FLEXIWATT FM2 27 | Tube | EAR99 | CHINA | 4.9 / 1k | |
| TDA7850AH | No availability of distributors reported, please contact our sales office | Buy now | Active | FLEXIWATT 27 HB | Tube | EAR99 | CHINA | 4.9 / 1k |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
