Overview
The TDA7851FH-QIX is a high-performance MOSFET technology class AB audio power amplifier designed by STMicroelectronics. It is specifically tailored for high-power car radio applications. The amplifier features a fully complementary P-Channel/N-Channel output structure, enabling a rail-to-rail output voltage swing. This design combines high output current with minimized saturation losses, resulting in unparalleled distortion performance in the car-radio field.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Power (4 Ω max.) | 4 x 48 W | - |
| Output Power (4 Ω @ 14.4 V, 1 kHz, 10%) | 4 x 28 W | - |
| Output Power (2 Ω max.) | 4 x 72 W | - |
| Operating Supply Voltage | 18 V | V |
| Peak Supply Voltage (for t = 50 ms) | 50 V | V |
| Output Peak Current (Non repetitive, t = 100 μs) | 10 A | A |
| Output Peak Current (Repetitive, duty cycle 10% at f = 10 Hz) | 9 A | A |
| Power Dissipation (Tcase = 70 °C) | 85 W | W |
| Junction Temperature | 150 °C | °C |
| Storage Temperature | -55 to 150 °C | °C |
| Distortion (THD) at Po = 4 W | 0.01 to 0.05 % | % |
| Output Noise (A Weighted, Bw = 20 Hz to 20 kHz) | 35 to 50 μV | μV |
Key Features
- Multipower BCD technology
- MOSFET output power stage
- Excellent 2 Ω driving capability
- Hi-Fi class distortion
- Low output noise
- Standby function
- Mute function
- Automute at minimum supply voltage detection
- Low external component count:
- Internally fixed gain (26 dB)
- No external compensation
- No bootstrap capacitors
- Output DC offset detector
- Protections:
- Output short circuit to GND, to Vs, across the load
- Very inductive loads
- Overrating chip temperature with soft thermal limiter
- Load dump voltage
- Fortuitous open GND
- Reversed battery
- ESD
Applications
The TDA7851FH-QIX is primarily designed for high-power car radio applications. Its high output power capability, excellent distortion performance, and robust protection features make it an ideal choice for automotive audio systems.
Q & A
- What is the maximum output power of the TDA7851FH-QIX at 4 Ω?
The maximum output power is 4 x 48 W at 4 Ω.
- What is the operating supply voltage range for the TDA7851FH-QIX?
The operating supply voltage range is up to 18 V, with a peak supply voltage of 50 V for t = 50 ms.
- What type of output stage does the TDA7851FH-QIX use?
The TDA7851FH-QIX uses a MOSFET output power stage.
- Does the TDA7851FH-QIX have built-in protection features?
Yes, it includes protections such as output short circuit, overrating chip temperature, load dump voltage, fortuitous open GND, reversed battery, and ESD.
- What is the distortion performance of the TDA7851FH-QIX?
The distortion (THD) is between 0.01% and 0.05% at Po = 4 W.
- Does the TDA7851FH-QIX have standby and mute functions?
Yes, it includes both standby and mute functions, which are CMOS-compatible.
- What is the recommended value for the SVR capacitor?
The minimum recommended value for the SVR capacitor is 10 μF.
- How does the TDA7851FH-QIX handle high input signals?
The inputs are ground-compatible and can handle high input signals (±8 Vpk) without performance degradation.
- What is the thermal resistance junction-to-case for the TDA7851FH-QIX?
The thermal resistance junction-to-case (Rth j-case) is 1 °C/W.
- What package options are available for the TDA7851FH-QIX?
The TDA7851FH-QIX is available in FLEXIWATT 25 HB package.
