2x20W Stereo BTL Fix Frequency Class D Audio Amplifier Evaluation Board
The EV7751-F-00A is the evaluation board for the MP7751, a 20W stereo BTL Fix Freuquency Class D Audio Amplifier. It is one of MPS’ products of fully integrated audio amplifiers which dramatically reduce solution size by integrating the following:
- 240mΩ power MOSFETs
- Startup / Shutdown pop elimination
- Short circuit protection circuits
- Advanced EMI performance
The MP7751 utilizes Bridge Tied Load output structure capable of delivering stereo 20W into 8Ω speakers. It features in automatic shutdown function which can save power in battery-used system. The PLIMIT function is useful for limiting total output power by simply adjust a DC reference voltage at PLIMIT pin. MPS Class D Audio Amplifiers exhibit the high fidelity of a Class A/B amplifier at high efficiency.
- 20W Stereo BTL Output at VDD = 18V into 8Ω loads
- 9.5W Stereo BTL Output at VDD = 12V into 8Ω loads
- Better than 90% Efficiency at 9.5W x 2 and VDD=12V with 8Ω load, Stereo
- Low Noise (120μV Typical)
- 5V to 26V Operation from a Single Supply
5V-26VDD, 2x20W Fixed Frequency Stereo BTL Class D Audio Amplifier
MP7751 is an analog input Class D Audio Amplifier which can drive stereo speakers in bridge-tied-load configuration. It is one of MPS’ products of fully integrated audio amplifiers which dramatically reduce solution size by integrating the following:
240mΩ power MOSFETs
Startup / Shutdown pop elimination
Short circuit protection circuits
Advanced EMI performance
The MP7751 utilizes a stereo BTL structure capable of delivering 20W per channel into 8Ω speakers at 18V power supply. MPS Class D Audio Amplifiers exhibit the high fidelity of a Class AB amplifier at high efficiencies.
The MP7751 includes an internal circuit which allows the system automatic shutdown after the absence of the audio signal. This feature is used for energy-using products and for battery operated applications.
It also has an adjustable power limit function. The PLIMIT circuit sets a limit on the output peak-to-peak voltage. The limiting is done by limiting the duty cycle to fixed maximum value. This limit can be thought of as a "virtual" voltage rail which is lower than the supply connected to PVCC.
The MP7751 is available in TSSOP-28 EP package.