Click Here to enter Utsource  site

IC Chips

74 series Digital Integrated Circuits

CD40 series Digital Integrated Circuits

Optical Couplers

Clock & Calculator ICs

Operational Amplifiers

Power Switch Ics

Driver Ics

Flash Memory

Memory

Audio Special Purpose

Clock/Timing - Application Specific

Clock/Timing - Clock Buffers, Drivers

Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

Clock/Timing - Delay Lines

Clock/Timing - IC Batteries

Clock/Timing - Programmable Timers and Oscillators

Clock/Timing - Real Time Clocks

Data Acquisition - ADCs/DACs - Special Purpose

Data Acquisition - Analog Front End (AFE)

Data Acquisition - Analog to Digital Converters (ADC)

Data Acquisition - Digital Potentiometers

Data Acquisition - Digital to Analog Converters (DAC)

Data Acquisition - Touch Screen Controllers

Embedded - CPLDs (Complex Programmable Logic Devices)

Embedded - DSP (Digital Signal Processors)

Embedded - FPGAs (Field Programmable Gate Array)

Embedded - FPGAs (Field Programmable Gate Array) with Microcontrollers

Embedded - Microcontroller, Microprocessor, FPGA Modules

Embedded - Microcontrollers

Embedded - Microcontrollers - Application Specific

Embedded - Microprocessors

Embedded - PLDs (Programmable Logic Device)

Embedded - System On Chip (SoC)

Interface - Analog Switches - Special Purpose

Interface - Analog Switches, Multiplexers, Demultiplexers

Interface - CODECs

Interface - Controllers

Interface - Direct Digital Synthesis (DDS)

Interface - Drivers, Receivers, Transceivers

Interface - Encoders, Decoders, Converters

Interface - Filters - Active

Interface - I/O Expanders

Interface - Modems - ICs and Modules

Interface - Modules

Interface - Sensor and Detector Interfaces

Interface - Sensor, Capacitive Touch

Interface - Serializers, Deserializers

Interface - Signal Buffers, Repeaters, Splitters

Interface - Signal Terminators

Interface - Specialized

Interface - Telecom

Interface - UARTs (Universal Asynchronous Receiver Transmitter)

Interface - Voice Record and Playback

Linear - Amplifiers - Audio

Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Linear - Amplifiers - Special Purpose

Linear - Amplifiers - Video Amps and Modules

Linear - Analog Multipliers, Dividers

Linear - Comparators

Linear - Video Processing

Logic - Buffers, Drivers, Receivers, Transceivers

Logic - Comparators

Logic - Counters, Dividers

Logic - FIFOs Memory

Logic - Flip Flops

Logic - Gates and Inverters

Logic - Gates and Inverters - Multi-Function, Configurable

Logic - Latches

Logic - Multivibrators

Logic - Parity Generators and Checkers

Logic - Shift Registers

Logic - Signal Switches, Multiplexers, Decoders

Logic - Specialty Logic

Logic - Translators, Level Shifters

Logic - Universal Bus Functions

Memory - Batteries

Memory - Configuration Proms for FPGAs

Memory - Controllers

PMIC - AC DC Converters, Offline Switchers

PMIC - Battery Chargers

PMIC - Battery Management

PMIC - Current Regulation/Management

PMIC - Display Drivers

PMIC - Energy Metering

PMIC - Full, Half-Bridge Drivers

PMIC - Gate Drivers

PMIC - Hot Swap Controllers

PMIC - Laser Drivers

PMIC - LED Drivers

PMIC - Lighting, Ballast Controllers

PMIC - Motor Drivers, Controllers

PMIC - OR Controllers, Ideal Diodes

PMIC - PFC (Power Factor Correction)

PMIC - Power Distribution Switches, Load Drivers

PMIC - Power Management - Specialized

PMIC - Power Over Ethernet (PoE) Controllers

PMIC - Power Supply Controllers, Monitors

PMIC - RMS to DC Converters

PMIC - Supervisors

PMIC - Thermal Management

PMIC - V/F and F/V Converters

PMIC - Voltage Reference

PMIC - Voltage Regulators - DC DC Switching Controllers

PMIC - Voltage Regulators - DC DC Switching Regulators

PMIC - Voltage Regulators - Linear

PMIC - Voltage Regulators - Linear + Switching

PMIC - Voltage Regulators - Linear Regulator Controllers

PMIC - Voltage Regulators - Special Purpose

Specialized ICs

Modules

IGBT

IPM

Thyristors

Rectifiers

Power Supply

Smart Power Module

SCR,GTO and Diode

FET

Darlington Transistors

RF Modules

CNC PRODUCTS

ENCODER

Motor

Servo drive & amplifier & Servo

Diode Module

Transistor Module

Switch Relay

PLC

Inverter

Contactor & Breaker

Elevator Board

Industry Control

Transistors

Diodes

Bipolar transistors

Resistors

Carbon Film Resistors

Cement Resistors

Chassis Mount Resistors

Chip Resistor - Surface Mount

Current Sense Resistors

Fusible Chip Resistor

High Precision & Low TCR SMD Resistors

High Voltage Resistor

LED Strip Resistors

MELF Resistor

Metal Alloy Resistors

Metal Film Resistor (TH)

Metal Glaze Resistors

Metal Oxide Film Resistors

Metal Oxide Resistors

NTC Thermistors

PTC Thermistors

Photoresistors

Potentiometers & Variable Resistors

Precision Potentiometer

Resistor Networks & Arrays

Resistor Networks & Arrays (TH)

Ultra Low Resistors (SMD)

Variable Resistors

Varistors

Wirewound Resistors

Capacitors

Aluminum Electrolytic Capacitors - SMD

CL21 Capacitor

Ceramic Disc Capacitors

High Voltage Capacitors

Metallized Polyester Film Capacitor

Multilayer Ceramic Capacitors MLCC - Leaded

Multilayer Ceramic Capacitors MLCC - SMD/SMT

Mylar Capacitor

Niobium Oxide Capacitors

Polyester Film Capacitors

Solid Polymer Electrolytic Capacitor

Supercapacitors & Ultracapacitors

Suppression Capacitors

Tantalum Capacitors

Trimmers, Variable Capacitors

Inductors & Ferrite Beads & Transformers

Antennas

Current Transformers

General Inductors (TH)

HF Inductors

Inductors (SMD)

LINE Filter

Power Inductors

Power Transformer

RJ45 Transformer

Radial Inductor (TH)

The circular inductors

Crystals

49S

49SMD

49U

Ceramic Resonators

DIP Oscillators(XO)

Radial Cylinder Crystals

SAW Resonators

SMD Crystals

SMD Oscillators(XO)

Connectors

AV Connectors

Audio & Video Connectors

Banana and Tip Connectors

Card Edge Connectors

Circular Connectors

Connector - Card Sockets

Connectors

Connectors - Accessories

Connectors - Housings

Contacts

D-Sub Connectors

Ethernet Connectors/Modular Connectors

FFC, FPC (Flat Flexible) Connectors

Fiber Optic Connectors

IC & Component Sockets

LED Light Pipes

Mezzanine Connectors (Board to Board)

PCB Connectors - Headers, Male Pins

PCB Connectors - Headers, Receptacles, Female Sockets

PCB Connectors - Housings

Power Connectors

RF Connectors/Coaxial Connectors

Shunts & Jumpers

Terminal Blocks - Accessories

Terminal Blocks - Barrier Blocks

Terminal Blocks - Din Rail, Channel

Terminal Blocks - Headers, Plugs and Sockets

Terminals

Test Clips

Test Points/Test Rings

USB Connectors

Unspecified Connectors

Screw-type wiring

Spring-type wiring

Pluggable Terminal Blocks

Through-wall Terminal Blocks

Automotive Terminals

Terminal Housings, Insulation Sleeves & Blocks

Quick Disconnect Wire Connectors and Terminals

Spare & Wear Tooling

Automotive Connectors

PCB Connectors

PC Laptop Parts

Lenovo Spare Parts

HP Spare Parts

Dell Spare Parts

Samsung Spare Parts

Asus Spare Parts

Microsoft Spare Parts

Huawei Spare Parts

Replacement Keyboards

Others

Laptop Screen

Mac Parts

LCD Screen

LCD Related Parts

Bottom Cover

Keyboard

Screws

Flex Cable

Touchpad

Power Board

Network Adapter

SSD Related Parts

Motherboard

Cooling Fan

Earpiece & Loundspeaker

Rubber Mats

Others

DJI Spare Parts

For DJI Phantom Series

For DJI Mavic Series

For DJI Spark Series

For DJI FPV Series

For DJI Mini Series

Others

iPhone 15 Pro Max Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Others

iPhone 15 Pro Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Others

iPhone 15 Plus Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Others

iPhone 15 Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Others

iPhone 14 Pro Max Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

FPC Connector

Others

iPhone 14 Pro Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

FPC Connector

Others

GoPro Spare Parts

Digital Camera Parts

Outer Screen

LCD Screen

Motherboard

Drive Board

Bayonet Mount Ring

Eyecups

Mode Dial

USB Cover Cap

Battery Cover

Flex Cable

Protective Leather

Card Slot

Button Cap

Shutter Blade Curtain

Others

iPhone 14 Plus Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

FPC Connector

Others

VR Spare Parts

iPhone 14 Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Others

iPhone 13 Pro Max Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Others

iPhone 13 Pro Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Others

iPhone 13 Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Others

iPhone 13 Mini Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Others

iPhone 12 Pro Max Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Side Key & Card Tray

Others

iPhone 12/12 Pro Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Metal Parts

Others

iPhone 12 Mini Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Metal Parts

Others

iPhone 11 Parts

Back Cover

LCD Related Parts

Flex Cable

Camera Series

Metal Parts

Others

iPhone 11 Pro Parts

Back Cover

LCD Related Parts

Flex Cable

Camera Series

Metal Parts

Others

iPhone 11 Pro Max Parts

Back Cover

LCD Related Parts

Flex Cable

Camera Series

Metal Parts

Others

iPhone XS Parts

Back Cover

LCD Related Parts

Flex Cable

Camera Series

Metal Parts

Others

iPhone XS Max Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Metal Parts

Others

iPhone XR Parts

LCD Related Parts

Back Cover

Flex Cable

Camera Series

Metal Parts

Others

iPhone X Parts

Back Cover

LCD Related Parts

Flex Cable

Camera Series

Metal Parts

Others

iPhone 8 Parts

LCD Screen

Glass Lens

Back Cover

Camera Series

Card Tray

Flex Cable

Metal Parts

Others

iPhone 8 Plus Parts

LCD Screen

Glass Lens

Back Cover

Camera Series

Button & Card Slots

Flex Cable

Metal Parts

Others

iPhone 7 Parts

LCD Screen

Glass Lens

Back Cover

Camera

Flex Cable

Metal Parts

Others

iPhone 7 Plus Parts

LCD Screen

Glass Lens

Back Cover

Camera

Flex Cable

Metal Parts

Others

Other iPhone Parts

iPhone 6S/6S Plus Parts

iPhone 6/6 Plus Parts

iPhone 5 Parts

iPhone 4/4S Parts

iPhone SE 2020 / 2022 Parts

SE 3rd Generation Parts

SE 2nd Generation Parts

SE 1st Generation Parts

iPad Pro Series Parts

12.9 inch

10.5 inch

9.7 inch

iPad Air Series Parts

iPad Air 2 Parts

iPad Air Parts

vivo Parts

LCD Screen

Outer Glass Lens

Touch Panel

Frame Bezel Plate

Back Cover

Flex Cable

Camera Parts

Charging Port Board

Single Tail Connector

Speaker Ringer Buzzer

Card Socket

Home key & Side Key

Others

iPad mini Series Parts

iPad mini 4 Parts

iPad mini 3 Parts

iPad mini 2 Parts

iPad mini Parts

OPPO Parts

LCD Screen

Outer Glass Lens

Touch Panel

Frame Bezel Plate

Back Cover

Camera Series

Flex Cable

Single Tail Connector

Speaker Ringer Buzzer

Card Socket

Home key & Side Key

Small Board

Others

Tecno Spare Parts

LCD Screen

Outer Glass Lens

Back Cover

Small Board

Single Tail Connector

Camera Parts

Flex Cable

Card Tray

Infinix Spare Parts

LCD Screen

Outer Glass Lens

Small Board

Single Tail Connector

Camera Parts

Flex Cable

Earpiece & Loundspeaker

Card Tray

itel Spare Parts

Alcatel Spare Parts

LCD Screen

Outer Glass Lens

Touch Panel

Back Cover

Flex Cable

Single Tail Connector

Small Board

Card Tray

OnePlus Parts

LCD Screen

LCD Related Parts

Frame Bezel Plate

Back Cover

Camera Series

Flex Cable

Tail Connector

Speaker Ringer Buzzer

Card Tray

Earpiece

Home key & Side Key

Adhesive Sticker

Others

Game Spare Parts

Switch Lite Spare Parts

Switch Spare Parts

PS5 Spare Parts

PS4 Spare Parts

NDS Spare Parts

3DS Spare Parts

Wii Spare Parts

PSP Spare Parts

PS3 Spare Parts

PS2 Spare Parts

XBOX Spare Parts

Steam Deck Spare Parts

Tools

iPad Series Parts

iPad 4 Parts

iPad 3 Parts

iPad 2 Parts

iPad Parts

Galaxy Spare Parts

LCD Screen

Touch Panel

Outer Glass Lens

Frame Bezel Plate

Back Cover

Camera

Card Socket

FPC Connector

Single Tail Connector

Charging Port Board

Wireless Charging Module

Home key & Side Key

Flex Cable

Earpiece & Loundspeaker

Vibrating Motor

Adhesive Sticker

Polarizing Film

OCA & LCD Backlight

Others

Huawei Spare Parts

LCD Screen

Touch Panel

Outer Glass Lens

Adhesive Sticker

OCA & Polarizing Films

Camera

Card Socket

FPC Connector

Tail Connector

Back Cover

Full Housing Cover

Flex Cable

Home key & Side Key

Fingerprint Ring

Earpiece & Loundspeaker

Earphone Jack

Others

Xiaomi Spare Parts

LCD Screen

Touch Panel

LCD Related Parts

Back Cover

Frame Bezel Plate

Backlight Plate & OCA

Camera

Tail Connector

Card Tray

Flex Cable

Speaker Ringer Buzzer

Earpiece Speaker

Vibrating Motor

Home key & Side Key

Adhesive Sticker

Others

Meizu Spare Parts

LCD Screen

Outer Glass Lens

Touch Panel

Frame Bezel Plate

Camera

Back Cover

Full Housing Cover

Tail Connector

Card Socket

Flex Cable

Home key & Side Key

Earpiece & Loundspeaker

Apple Serie Parts

Airpods Series

Apple Pencil Series

Batteries

For iPhone

For iPad & iPod Series

For Mac

For Samsung

For Xiaomi

For Huawei

For Sony

For LG

For Nokia

For Motorola

For Lenovo

For HTC

For OnePlus

For OPPO

For Watch

Others

Apple Watch Parts

LCD Related Parts

Back Cover

Flex Cable

Vibrating Motor

Middle Frame

Adhesive Sticker

Other Parts

Watch Spare Parts

For Samsung

For Huawei

For Xiaomi

For Fitbit

For Garmin

Other

Sony Spare Parts

LCD Screen

Touch Panel

Back Cover

Frame Bezel Plate

Flex Cable

Camera

LCD Backlight Plate

Tail Connector

Speaker Ringer Buzzer

Earpiece Speaker

Adhesive Sticker

Card Tray

Dust Plug

Others

HTC Spare Parts

LCD Screen

Touch Panel

Back Cover

Full Housing Cover

Camera Series

Tail Connector

Flex Cable

Speaker Ringer Buzzer

Adhesive Sticker

Others

Nokia Spare Parts

LCD Screen

Touch Panel

Outer Glass Lens

Replacement Keypad

Flex Cable

Back Cover

Adhesive Sticker

Full Housing Cover

Earpiece & Loundspeaker

Card Tray

Camera

Charging Port Connector

Charging Port Board

Lenovo Spare Parts

LCD Screen

Touch Panel

Outer Glass Lens

Tail Connector

Back Cover

Camera

Flex Cable

Others

Google Spare Parts

LCD Screen

Outer Glass Lens

Frame Bezel Plate

Back Cover

Flex Cable

Small Board

Camera Parts

Earpiece & Loundspeaker

Vibrating Motor

Card Tray

Adhesive Sticker

Others

ASUS Spare Parts

LCD Screen

Touch Panel

Outer Glass Lens

Camera

Tail Connector

Back Cover

Flex Cable

Speaker Ringer Buzzer

Frame Bezel Plate

Card Tray

Others

Microsoft Spare Parts

LCD Screen

LCD Related Parts

Flex Cable

Back Cover

Full Housing Cover

Camera Series

Others

Motorola Spare Parts

LCD Screen

Touch Panel

Outer Glass Lens

Frame Bezel Plate

Charging Port Board

Card Socket

Back Cover

Camera Accessories

Flex Cable

Earpiece & Loundspeaker

Others

More Brand Parts

For LG

For Amazon

For BlackBerry

For ZTE

For Acer

For BQ Aquaris

For Wiko

For Letv

For Vodafone

For 360

For CAT

For TCL

For T-Mobile

Others

iPod Parts

Touch Series

Other Parts

Shenzhen Brand Phone Parts

AGM

Doogee

LEAGOO

Blackview

Ulefone

UMIDIGI

Cubot

IIIF150

Others

IC Chipset

IC for iPhone

IC for Samsung

IC for Huawei

Power IC

Audio IC

Hard Disk for iPhone

Repair Tools

Screwdriver

Screwdriver Set

Tool Kits

Test Tools

Repair Fixture

Repair Programmer

Power Supply

Repair Glue Series

Adhesive Sticker

Laminator Machine

Separation Equipment

Laser Machines

Polishing Repair

Defoaming Equipment

Laminating Machines

Repair Platform

Crowbar

Brushes

Working Mat

Magnetic Screws Mat

Magnetizer Demagnetizer Tool

Sucker

Tweezers

Glove

Dust Remove Tool

BGA Stencils

Mould

Microscope Magnifier Series

Tool Boxes & Bags

Phone Film Cutter

Others

Sign In

3.Enter "account center"->"My inquiries" and check the status of your inquiries
liveTop

Dear customers, due to the implementation of the GDPR policy in Europe, UTSOURCE has also made adjustment accordingly to meet the policy requirements. Please read the new privacy policy carefully and this window will no longer pop up after you accept it.

I agree all UTSOURCE Terms & Conditions,Privacy Statement
Agree Later Submit

Delivery Address

Alternate Text

+ Add Address

Confirm

The new shipping address

*Country/Region :
*Contact :
*Cell Phone:
+

* Please fill in the cell phone number correctly to make sure that you can receive the tracking info in time.

Country Code
*Address :
*City :
Province/State :
*Province/State :
*Post Code :
Please enter a new 5-digit zip code..
Company :
Cancel
Submit

The difference between tda7293 and tda7294 (pin function and circuit diagram)

PViews:969

2021-11-29 11:27:24 source:Utsource author:Utsource
more information,enter the information center

The difference between tda7293 and tda7294

ST's new high-power DMOS power amplifier IC TDA7294, with its high power, complete protection functions, and a very good dull tone, is loved by the majority of audio enthusiasts and has become an audio power amplifier IC in audio DIYERs at home and abroad. ST's first choice, and then STMicroelectronics has launched TDA7293 with better performance and power. In addition to the increase in power, it can be seen from the official information that the conversion rate of TDA7293 is also 10V/us, but there are more Wide voltage power supply range, up to dual 50V DC power supply, which means that it has a larger dynamic range and higher output power than TDA7294. It can reach 100W average output power when dual 40V DC power supply and 8 ohm load. Of course, if the voltage is increased to double 50V, or a smaller load such as 4 ohms, there will be greater output power. According to the characteristics of TDA7293, when selecting a transformer, double 28V AC voltage can be selected, so that the filtered voltage is rectified It is about double 40V. Of course, the voltage can also be increased. Considering that the grid voltage has a fluctuation, it is better to be a few volts less than the maximum voltage of 50V, which is beneficial to the stable operation of the circuit.

 

TDA7293 performance parameters

Power supply voltage (dual power supply): ±12±50±60V

Output power: Vs=±45VR=8Ω140w

Open loop voltage gain: 80dB

Conversion rate: 15v/μS

Output current: 6.5A

Input impedance: 100120150KΩ

 

Single row dual row (MulTIwatt15) 15-pin package. Operating voltage range: ±12V—±60V; peak output current 10A; output power: 100W at ±40V, 8Ω; 140W at ±45V, 8Ω; 100W at ±29V, 4Ω; total harmonic distortion (Po=5W, f= 1KHz) 0.005%; conversion rate 15V/μs (TDA7294 is 10V/μs, the higher the conversion rate, the richer the sound quality level); input impedance 100KΩ; frequency response 20Hz-20Kz; working in Class A and B status.

 

The internal structure of TDA7293 is divided into three stages: the differential input stage is composed of bipolar transistors, and the driving stage and power output stage use field effect transistors. This structure can integrate the low noise of bipolar transistors and the linearity and temperature coefficient of power field effect transistors. , The advantage in tone. The sound is beautiful, taking into account the advantages of bipolar signal processing circuit and MOS power tube, it has the advantages of low distortion, low noise, high withstand voltage, mute switch, overheat protection, short circuit protection, etc.

SupplierFile/202111/29/f_3c724e6a23d64ce2a270c67dc5de464d.png

 

TDA7293 pins and functions

SupplierFile/202111/29/f_55cef0a6efeb4ac3b565720dbd09cfe4.png

Pin 1 is the standby ground;

Pin 2 is the inverting input terminal;

Pin 3 is the positive phase input terminal;

4 feet are ground;

Pin 5 is the short-circuit current detection terminal, usually as floating;

6 feet is the bootstrap end;

Pin 7 is the positive power input terminal (signal processing part);

Pin 8 is the negative power input terminal (signal processing part);

Pin 9 is the standby end;

Pin 10 is the mute end;

11 is the buffer drive output terminal (used when bridging);

Pin 12 is the feedback input terminal;

Pin 13 is the positive power input terminal (part of the power output stage);

Pin 14 is the power output terminal;

Pin 15 is the negative power input terminal (part of the power output stage)

 

tda7293 circuit diagram

SupplierFile/202111/29/f_7623f30fd0e74ac597da334d8b6c99e8.jpg

Figure 1 is the circuit schematic diagram of the current negative feedback constant current power amplifier using TDA7293 (only one channel is drawn in the picture, and the other channel is the same). The current negative feedback is adopted, which also includes the speaker system in the feedback network. , Plays a positive role in the control of the speaker, effectively offsets the distortion caused by the vibration of the speaker, significantly enhances the bounce of the music, makes the rigid sound in a single plane sound field become lively, and enhances the sense of space. The width and depth of the sound field have been significantly improved.

 

In order to solve the dryness and hairiness of digital music from digital audio sources (such as CD, VCD, DVD, etc.), the circuit in Figure 1 has a softening effect on digital sounds, and can soften the forward "fuzzy" sound of digital audio sources. Turn the hard sound into music. The function is that cf1 and cf2 in the circuit in Figure 1 are high-frequency AC gain compensation networks, which are used to reduce digital sound (compress high-frequency overtones above 60-80KHz) Or weaken). IC2 in the picture is DC servo function.

 

Purpose of component selection: good circuit design plus the selection of high-quality components can exert its effect to the highest limit! ①WIMAMKP polypropylene non-inductive capacitor for signal coupling; ②The resistor adopts imported metal film low-noise precision (±1%) five-color ring resistor, and its noise is very low; ③The non-polar capacitor adopts Japanese Panasonic metallized non-inductive CBB capacitor and MKP Polypropylene non-inductive capacitor; ④The circuit board adopts silver-plated glass fiber epoxy board (the benefits of silver plating: prevent oxidation, reduce solder joint resistance, and help improve the analysis of small signals), printed with high-grade blue oil change;.

 

Application of assembled power amplifier: The circuit in Figure 1 is a dual-channel power-free part (the schematic diagram of the power part is very simple, not drawn here). The advantage of this is that it improves the signal-to-noise ratio of the left and right channels, and the assembly When the power amplifier is combined, the power supply can be far away to reduce the AC interference, so that a good power amplifier can be made. At this time, a suitable solution for AV and Hi-Fi is recommended: virtual Dolby surround sound processing circuit QS7779→BBE circuit (BA3884)→tone circuit (ME-128 or KA-307 Class A pre-stage or SP-27 or LM4610N) → power amplifier board, plus 400W double 26V ring cow. ▲When assembling, pay attention to the grounding method and the input ground and output ground must be separated to the power ground before they can be connected.

 

Main features of TDA7294

■Wide power supply voltage range: ±10V ~ ±40V

■High output power: 70W (up to 100W)

■Standby and mute function

■No noise ON/OFF switch

■Low noise and low distortion

■Short circuit protection and overheat protection

 

DA7294 pin and function

SupplierFile/202111/29/f_98447f2ce1344913943da18b5e9a6b7a.png

Pin 1 is the standby end;

Pin 2 is the inverting input terminal;

Pin 3 is the positive phase input terminal;

4 feet are grounded;

5, 11, and 12 feet are empty;

6 feet is the bootstrap end;

Pin 7 is +Vs (signal processing part);

Pin 8 is -Vs (signal processing part);

9 feet are standby feet;

10 feet are silent feet;

13 feet are +Vs (last stage);

Pin 14 is the output terminal;

15 feet are -Vs (last stage).

 

tda7294 circuit diagram

The OCL circuit diagram is shown in Figure 1. This circuit is a dual-channel 70W power amplifier composed of two TDA7294. There are few external components and simple circuit. When the power supply voltage is ±35V, 70W continuous output power can be obtained on an 8 ohm load. It is very suitable for playback in an environment below 30 square meters. If the speaker impedance is less than 8 ohms, the power supply voltage should be reduced accordingly.

SupplierFile/202111/29/f_7bb0ec30d74a43d580f2f798b508fc4e.jpg

 


Key words: tda7293 tda7294

participate in discussions

New customer

Please login ? to participate in the comments

New customer Start here.

Submit

Comments

Toll-Free Call

(888) 766 5577 USA & Canada

+52 5515436027
+52 5515436028 Mexico

+49 6931090199 Germany

Whatsapp

+1 (657) 605-6198 USA

+49 15217848563 Germany

+52 55 7637 4368 Mexico

Email

sales@utsource.com

GLOBAL PAYMENTS

Global logistics

footShip
Copyright © 2022 Power by UTSOURCE HOLDING COMPANY LIMITED ISO/IEC 20000-1:2011,ISO/IEC 27001:2013 鄂ICP备2021003526号-1