Electronics Projects, TAS5611A Class D Amplifier Circuit Project article
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The block diagram of the integrated circuit TAS5611A As mentioned above, the circuit contains 4 identical channels. The input signal is fed to pin INPUT_X. Signal continues into the feedback filter ANALOG LOOP FILTER and further to the input multiplexer the ANALOG INPUT MUX. In the block ANALOG COMPARATOR MUX occurs to compare the input signal with a reference voltage. The resulting PWM signal processing PWM RECEIVER. Followed by the procedure signal in the block CONTROL and timing of the signal in the block THE TIMING CONTROL. The last block is the exciter power transistors GATE-DRIVE, which is connected with the pin BST_X. This TAS5611A pin is used to connect a “bootstrap” capacitor. An auxiliary diode for the management of the way the “bootstrap” is integrated into the chip circuit. Power the voltage of half-bridges is connected between pins PVDD_X and GND_X. Supply voltage logic and control blocks in the circuit is supplied to pins VDD and GVDD_X. Power PWM the signal is led out pin OUT_X.
Class D Amplifier TAS5611A Circuit
In the circuit is incorporated some protections. They are primarily protection against undervoltage in power, thermal overload, limitation and short circuit on the output. When the danger of destruction of the chip it comes to the automatic shutdown circuit, which is indicated by a change in logical value on the pin /SD. The high temperature of the chip is indicated by a change in logical value on pins /OTW1 and /OTW2. Critical the temperature at which there is the automatic TAS5611A shutdown circuit is 155°C. To the operating mode the circuit returns by changing the logic value at pin /RESET. The error table given below.
The circuit can be configured to different modes. Using pins M1, M2, M3 can be to set individual modes. An example can be (HANDCUFFS is when ZL = 4 , 1 % THD+N): · differential wiring inputs, the wiring load of the full bridge (2×100 W) · 4 separate channels (4×50 W)
Scheme of the power stage shown in Fig. 8. Circuit TAS5611A it is taken from the manufacturer. The input stereo signal inputted to the connectors X10, X11 continues through the coupling members to the operational amplifier OPA1632. There is a transfer of unsymmetrical signal on the differential. The signal further via coupling members enters in the integrated circuit TAS5611A. Power PWM signal, protruding from the chip is conducted to the output of the filter formed by the elements of the L1X, C5X. Filter cut-off frequency has a value of 73kHz. The outputs of the amplifiers are provided with Boucherotovými members, consisting of a serial combination of the elements of the R7X and C7X.
tas5611a class-d amplifier pcb schematic all files alternative links: tas5611a-class-d-amplifier-circuit-project.rar alternative link2