The **TDA7052AL-S08-R** is a specialized integrated circuit designed primarily for low-voltage audio amplification. It is an enhanced version of the classic TDA7052, featuring a DC volume control. --- ### ## 1. Key Specifications The following table summarizes the primary electrical characteristics of the TDA7052AL: | Parameter | Specification | | :--- | :--- | | **Supply Voltage (Vcc)** | 3V to 18V | | **Output Power** | 1.1W (at 6V, 8Ω load) | | **Voltage Gain** | 35.5 dB (Maximum) | | **Package Type** | SOP-8 (Surface Mount) | | **Volume Control Range** | 75 dB | | **Quiescent Current** | 4 mA (Typical) | --- ### ## 2. Core Functional Features The TDA7052AL distinguishes itself through several internal mechanisms: * **DC Volume Control:** Unlike standard amplifiers that require a potentiometer in the signal path, this IC uses a DC voltage (at Pin 4) to control gain. This reduces noise and allows for easy integration with microcontrollers. * **Bridge-Tied Load (BTL):** It operates in BTL configuration, meaning the load is connected between two amplifier outputs. This provides higher power output at low supply voltages without needing large output coupling capacitors. * **Short-Circuit Protection:** The device includes internal circuitry to protect against output shorts to ground or supply rails. * **Missing Current Limiter (MCL):** It features a protection circuit that activates when the difference between the current in the output stages becomes too large. --- ### ## 3. Pin Configuration (SOP-8) | Pin Number | Symbol | Function | | :---: | :--- | :--- | | 1 | VP | Positive Supply Voltage | | 2 | IN+ | Audio Signal Input | | 3 | GND | Ground | | 4 | VC | DC Volume Control Input | | 5 | OUT+ | Positive Audio Output | | 6 | GND | Ground (Power) | | 7 | OUT- | Negative Audio Output | | 8 | N.C. | Not Connected | --- ### ## 4. Typical Application Circuit Because it uses BTL and internal gain settings, the external component count is extremely low. ```c // Concept Diagram of Connections Input Signal -> [Pin 2] DC Control Voltage (0-1.4V) -> [Pin 4] VCC (6V) -> [Pin 1] Speaker (+) -> [Pin 5] Speaker (-) -> [Pin 7] Ground -> [Pin 3 & 6] ``` ### ## 5. Ordering Suffix Breakdown (L-S08-R) * **L:** Lead-free / RoHS compliant. * **S08:** Indicates the Small Outline Package (SOP-8). * **R:** Tape & Reel packaging (standard for automated SMT assembly). ---