electronics-amplifier tutorial

Schematic diagram of the class-H BTL amplifier TDA1562Q is shown below, in this circuit. Has an internal booster circuit elements That allow to develop at 4 Ohm load with 14.2 volts power supply, the power to 70 Watts

Rangkaian TDA1562Q - 70 Watts BTL Amplifier

The TDA1562Q contains a mono BTL class-H power amplifier output. At low output power, up to 18 W, the device operates as a normal BTL amplifier. When a larger output voltage swing is required, the internal supply voltage is lifted by means of the external electrolytic capacitors. Due to this momentarily higher supply voltage of the obtainable output power is 70 W.

Besides shortcircuit protection and thermal protection (Almost 145 degree), this output impedance amplifiers offer a protection, if the impedance it is low Than 0.5 ohms the circuit is deactivated.

Feature of TDA1562Q BTL Amplifier

• Output power:----------------------36W RMS into 4R
• Music power:-----------------------70W into 4R
• Frequency response:---------------1dB down at 28Hz and 55kHz
• Input sensitivity:-------------------130mV RMS (for 36W into 4?)
• Harmonic distortion:----------------typically 0.2% (see graphs)
• Signal-to-noise ratio:----------------95dB unweighted (22Hz to 22kHz)