Overview
The TDA2003H, produced by STMicroelectronics, is a 10W car radio audio amplifier designed to provide high-quality audio output with minimal external components. It is an improved version of the TDA2002, offering enhanced performance and ease of assembly. This amplifier is capable of delivering a high output current of up to 3.5 A and features very low harmonic and crossover distortion. The TDA2003H includes built-in protection systems such as DC and AC short-circuit protection, thermal limiting circuit, and load dump voltage surge protection, ensuring safe and reliable operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak supply voltage (50 ms) | 40 | V |
| DC supply voltage | 28 | V |
| Operating supply voltage | 18 | V |
| Output peak current (non-repetitive) | 4.5 | A |
| Output peak current (repetitive) | 3.5 | A |
| Power dissipation at Tcase = 90 °C | 20 | W |
| Storage and junction temperature | -40 to 150 | °C |
| Thermal resistance junction-to-case | 3 | °C/W |
| Output power (RL = 4 Ω, d = 10%, f = 1 kHz) | 9 | W |
| Output power (RL = 2 Ω, d = 10%, f = 1 kHz) | 10 | W |
| Frequency response (-3 dB) | 40 to 15,000 | Hz |
| Distortion (f = 1 kHz, RL = 4 Ω, Po = 0.05 to 4.5 W) | 0.15 | % |
| Input resistance (f = 1 kHz) | 70 to 150 | kΩ |
| Voltage gain (open loop, f = 1 kHz) | 80 | dB |
| Voltage gain (closed loop, f = 1 kHz, RL = 4 Ω) | 39.3 to 40.3 | dB |
| Efficiency (f = 1 kHz, RL = 4 Ω, Po = 6 W) | 69 | % |
| Supply voltage rejection (f = 100 Hz, Vripple = 0.5 V, Rg = 10 kΩ, RL = 4 Ω) | 30 to 36 | dB |
Key Features
- Improved performance over the TDA2002 with pin-to-pin compatibility.
- Very low number of external components required.
- Ease of assembly and cost and space savings.
- High output current up to 3.5 A with very low harmonic and crossover distortion.
- Built-in protection systems including DC and AC short-circuit protection, thermal limiting circuit, load dump voltage surge protection up to 40 V, and protection diodes for open ground conditions.
- Ability to handle high current (up to 5 A) without damage in case of polarity inversion.
- Protection against inductive loads and accidental open ground.
- Thermal shutdown to prevent damage from excessive junction temperature.
Applications
The TDA2003H is primarily designed for use in car radio audio systems, offering high-quality audio amplification with robust protection features. It is suitable for various automotive audio applications where reliability and performance are critical.
- Car radio audio amplifiers
- Automotive audio systems
- Audio amplification in vehicles
Q & A
- What is the maximum output current of the TDA2003H?
The TDA2003H can deliver a maximum output current of up to 3.5 A (repetitive) and 4.5 A (non-repetitive).
- What is the operating supply voltage range for the TDA2003H?
The operating supply voltage range is from 8 V to 18 V.
- What are the built-in protection features of the TDA2003H?
The TDA2003H includes DC and AC short-circuit protection, thermal limiting circuit, load dump voltage surge protection up to 40 V, and protection diodes for open ground conditions.
- What is the frequency response of the TDA2003H?
The frequency response is from 40 Hz to 15,000 Hz (-3 dB).
- What is the efficiency of the TDA2003H at full power?
The efficiency is approximately 69% at f = 1 kHz, RL = 4 Ω, and Po = 6 W.
- Can the TDA2003H handle inductive loads?
Yes, the TDA2003H includes a protection diode to allow use with inductive loads.
- What is the thermal resistance junction-to-case of the TDA2003H?
The thermal resistance junction-to-case is 3 °C/W.
- How does the TDA2003H protect against polarity inversion?
The TDA2003H can handle high current (up to 5 A) without damage in case of polarity inversion, preventing destruction during fitting mistakes.
- What is the maximum power dissipation of the TDA2003H at Tcase = 90 °C?
The maximum power dissipation is 20 W at Tcase = 90 °C.
- What are the recommended component values for the application circuit?
The recommended component values are detailed in the datasheet, including input DC decoupling, ripple rejection, supply bypassing, and frequency stability components.
