Overview
The TDA7851A is a breakthrough MOSFET technology class AB audio power amplifier designed for high-power car radio applications. It features a fully complementary P-Channel/N-Channel output structure, allowing for a rail-to-rail output voltage swing. This design combines high output current with minimized saturation losses, setting new power references in the car-radio field with unparalleled distortion performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage (VS) | 18 | V |
| DC Supply Voltage (VS DC) | 28 | V |
| Peak Supply Voltage (VS pk) | 50 | V |
| Output Peak Current (Non-repetitive) | 10 | A |
| Output Peak Current (Repetitive) | 9 | A |
| Power Dissipation (Tcase = 70°C) | 85 | W |
| Junction Temperature (Tj) | 150 | °C |
| Storage Temperature (Tstg) | -55 to 150 | °C |
| Output Power (4 x 48 W / 4 Ω Max.) | 48 | W |
| Output Power (4 x 28 W / 4 Ω @ 14.4 V, 1 kHz, 10% THD) | 28 | W |
| Output Power (4 x 72 W / 2 Ω Max.) | 72 | W |
| Distortion (THD) at Po = 4 W | 0.01 to 0.05 | % |
| Output Noise (eNo) A-Weighted | 35 to 50 | 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
- 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 protection
Applications
The TDA7851A is specifically designed for high-power car radio applications, offering superior performance and reliability in automotive infotainment systems.
Q & A
- What is the maximum output power of the TDA7851A at 4 Ω?
The maximum output power is 4 x 48 W at 4 Ω.
- What is the operating supply voltage range for the TDA7851A?
The operating supply voltage range is up to 18 V DC.
- Does the TDA7851A have built-in protection features?
Yes, it includes protections such as output short circuit, overrating chip temperature, and ESD protection.
- What is the distortion performance of the TDA7851A?
The distortion performance is Hi-Fi class, with a THD of 0.01 to 0.05% at Po = 4 W.
- Can the TDA7851A drive 2 Ω loads?
Yes, it has excellent 2 Ω driving capability.
- What is the standby current consumption of the TDA7851A?
The standby current consumption is up to 20 μA.
- Does the TDA7851A have a mute function?
Yes, it includes a mute function and automute at minimum supply voltage detection.
- What is the thermal resistance junction-to-case of the TDA7851A?
The thermal resistance junction-to-case is 1 °C/W.
- Is the TDA7851A RoHS compliant?
Yes, it is RoHS compliant with an Ecopack2 grade.
- What is the storage temperature range for the TDA7851A?
The storage temperature range is -55 to 150 °C.
