Power Amp TDA 7293-dmos

PCB. Layout

PCB Layout (Component Side)

Schematic Diagram

Functions of the incorporated routine TDA7293

•     Very higher managing current range(±50v)
•     Dmos strength stage
•     High result strength (100w @ thd =10%, rl = 8Ω, vs = ±40v)
•     Muting/stand-by functions
•     No move on/off noise
•     Very low distortion
•     Very low noise
•     Shorter routine secured (with no in-put indication applied)
•     Heat shutdown
•     Video detector
•     Modularity (more gadgets can be quickly linked in just like generate very low impedances)

The system is offered with both stand-by and silence features, separately pushed by two CMOS sense appropriate feedback hooks.
The tour devoted to the transferring on and off of the firm have been properly enhanced to prevent any type of out of hand sensible temporary at the result.
The series that we suggest during the ON/OFF transients.
The program of determine 5 reveals the opportunity of using only one control for both st-by and silence features. On both the hooks, the highest possible appropriate variety goes along to the managing provide current.
A little strike routine sound firm IC TDA7293

The construction is just like TDA7294, but this IC allows use resources with greater principles ​​and thus has an increased result strength can arrive at to 100 H.

To install the routine we have the recommendation of the pcb with PDF information, and information. SCh and. BRD if you need to modify this structure in Cadsoft Eagle. The red range proven in the pulling of the structure is to make the relationship using a item of cable (jumper).

Component List :

Resistors 1/8 Watt 5%
R1, R2     22K – Red, Red, Orange, Gold
R3     680 – Blue, Gray, Brown, Gold
R4     27K – Red, Violet, Orange, Gold
R5     100K – Brown, Black, Yellow, Gold
R6     33K – Orange, Orange, Orange, Gold
Capacitors
C1, C8     1000µF/63 Volts – Polarized electrolytic capacitor
C2,C9     100nF/250 Volts – Metalized polyester film capacitor
C3     1µF/250Volts – Metalized polyester film capacitor
C4, C7     22µF / 63 Volts – Polarized electrolytic capacitor
C5, C6     10µF/35 Volts – Polarized electrolytic capacitor
Semiconductors
IC1     TDA7293 – Dmos Integrated circuit audio amplifier
D1     1N4148 – Silicon diode
Miscellanea
IN     Audio input connector
OUT     Audio output connector
M/ST     Connector for connecting a mute/standby key
PW     Power supply connector
Solder, wire, printed circuit board, box, connectors, etc..

Low Voltage Mini Stereo Amplifier

The circuit is easy to build, it can be done easily on the edge strip, although I never tried to be honest. As always make sure that you insert TDA2822M chip on the board the right way and you get electrolytic capacitors in the right direction, I recently blew one of the greatest speakers I mentioned above. Nothing else is particularly critical, as the amplifier to operate with the lowest resistance and capacitors, you can buy. A log-log pot is recommended because it allows easy adjustment of volume. Everything else can be added as you need to know the tone controls, etc., but it is unlikely that you'll need something else for simple systems.

Voltage range betwen 1.8 V - 18 V

Noise reduction class-D headphone driver amplifier

The NE58633 is a noise reduction stereo Class D Bridge-Tied Load (BTL) helmet driver amplifier. Each channel has a Class D driver's helmet BTL amplifier, a electret microphone preamplifier for low noise, noise reduction circuit and returned to the music amplifier input.

NE58633 is the battery voltage from 0.9 V to 1.7 V, the chip employs on-chip DC-DC boost converter and the internal reference voltage Vref which is filtered and country of origin of noise removal. It is a mute control, and plop, and then click a reduction circuit. The amplifier gain of the microphone and amplifier of the filter is fixed with external resistors. Differential architecture provides better noise immunity.

The NE58633 is able to drive through a 800 mVrms 16 Ω or 32 Ω load and offers Electrostatic discharge (ESD) protection and short circuit. Available in 32-pin HVQFN32 (5 mm x 5 mm x 0.85 mm) package for high density of small and layout is ideal for noise-reduction headsets and audio teaching aids.

Caracteristic of NE58633

- Low current consumption of 4.4 mA

- 0.9 V to 1.7 V battery operating voltage range

- 1 % THD+N at VO = 1 VM driving 16 Ω with a battery voltage of 1.5 V

- 10 % THD+N at 800 mVrms output voltage driving 16 Ω and 32 Ω loads with a battery voltage of 1.5 V

- Output noise voltage with noise reduction circuit typically 31 mVrms for Gv(cl) = 25 dB

- On-chip mute function

- Plop and click reduction circuitry

- Class-D BTL differential output configuration

- Electret microphone noise reduction polarization amplifier with external gain adjustment using resistors

- Music and filter amplifier with external gain adjustment using resistors

- DC-to-DC converter circuitry (3 V output) with 2.5 mA (typical) load current

- Internal voltage reference pinned out for noise decoupling

- Available in HVQFN32 package

Block Diagram

 

Pin Out

Schematic Aplication

Indor Intercom

In this circuit, intercom, an 8-ohm is used for both the microphone and output device. Phase BC109C extends a common base mode, in which case a good voltage gain, while providing a low input impedance of the speaker. Self-DC bias is used allowing increases of transistors in progress. LM386 is used in inverting mode amplifier power to increase the voltage gain and drives 8 ohm. 10k potentiometer volume control works, and the overall benefit can be adjusted using the 5k in advance. Double-pole switch, turn the position of the speakers, so you tend to speak and another to hear. Manually operate the switch (from inside the house) allows two-way communication.

HiFi Pre-amp

This is a HiFi low noise pre amplifier schematic. Wide frequency range around 10 Hz to 100 kHz will be won by the amplifier for maximum sound quality.

Portable Guitar Amplifier

Component Part

R1_____________22K 1/4W Resistor
C1_____________10µF 25V Electrolytic Capacitor
C2_____________100nF 63V Polyester or Ceramic Capacitor
C3_____________220µF 25V Electrolytic Capacitor
IC1____________TDA7052
J1,J2___________6.3mm Stereo Jack sockets (switched)
SPKR__________8 Ohm Loudspeaker (See Notes)
B1_____________9V PP3 Battery or 3V Battery (2 x 1.5V AA, AAA Cells in series etc.)

Notes:

For reasons of simplicity and robustness, the unit features a double bridge amplifier IC and a few others. For the same reason you can not control the volume or tone are provided as it is assumed that the existing controls on the electric guitar used successfully with the target.

No switch is used: the battery voltage is applied to the circuit when the jack is inserted into the input jack J1. To do this, make sure the input jack is a standard 1 / 4 inch mono guitar jack and J1 is a 1 / 4 inch stereo jack.

J2 output connector plug must be turned on the stereo type. The switch is arranged so that when a single stereo headphone jack is plugged in, the speaker will be disabled and the output disc at a time mono headsets in the series, giving full reproduction of the helmet. When used as an output Fuzz-box, a mono jack is connected to J2.

If the amplifier is to be enclosed in a pack of cigarettes, the speakers of standard diameter must be 57 or 50 mm.

Technical Data:

Max power: 1.5 W @ 9V - 8 ohms, 60mW @ 3V supply - 8 ohms

Flat frequency response from 20 Hz to 20 kHz

THD @ 100 mW: 0.2%

Max input voltage of 3V @: 8mV RMS

Minimum input voltage for the operation Fuzz-box: 18mV RMS @ 3V supply

Current consumption @ 9V 400 mW and power: 200mA

Current consumption @ 9V 250 mW and power: 150mA

Consumption 60mW @ 3V supply: 80mA

Standby current: 6mA @ 9V, 4mA @ 3V supply

Fuzz Box consumption: 3 mA @ 3V supply

Cracker Box IPod Amplifier

1. Toggle switch, single pole single throw
2. 9V battery
3. 9V Battery connector
4. 0.047µF capacitor
5. 220µF capacitor (biggest)
6. 0.01µf capacitor
7. 100µf capacitor
8. Hookup wire, 2 0 or 22 gauge AWG solid core is best.
9. 5KO potentiometer (audio or log taper)
10. 25-ohm (25O) rheostat
11. LM386N audio amplifier
12. 8-pin DIP IC socket
13. Chicken head knobs (2)
14. Prototyping PC board
15. Speaker, 8 ohm impedance
16. 10O resistor
17. 1/4 mono phone jack