TDA7490 Audio Amplifier 2x25W

TDA7490 general description:

The TDA7490 is a dual audio class D amplifier assembled in Flexiwatt 25 package; it is specially designed for high efficiency application mainly for TV and Home Stereo sets.

TDA7490 features: 

• 25W + 25W OUTPUT POWER:
• RL = 8Ω/4Ω; THD = 10%
• HIGH EFFICIENCY
• WIDE SUPPLY VOLTAGE RANGE (FROM
• ±10 TO ±25V)
• SPLIT SUPPLY
• TURN OFF/ON POP FREE
• ST-BY AND MUTE FEATURES
• SHORT CIRCUIT PROTECTION ACROSS
• THE LOAD
• THERMAL OVERLOAD PROTECTION
• EXTERNALLY SINCHRONIZABLE
• BRIDGE CONFIGURATION

TDA7490 amplifier diagram, circuits:

TDA7490 Audio Amplifier 2x25W

TDA7490 layout, pcb:

TDA7490 layout, pcb

TDA7490 layout, pcb

TDA7490 Audio Amplifier 2 x 25W / 1 x 50W

TDA7490 general description:

The TDA7490 is a dual audio class D amplifier assembled in Flexiwatt 25 package; it is specially designed for high efficiency application mainly for TV and Home Stereo sets.  TDA7490 Audio Amplifier 2 x 25W / 1 x 50W

TDA7490 features:

• 25W + 25W OUTPUT POWER:
• RL = 8Ω/4Ω; THD = 10%
• HIGH EFFICIENCY
• WIDE SUPPLY VOLTAGE RANGE (FROM
• ±10 TO ±25V)
• SPLIT SUPPLY
• TURN OFF/ON POP FREE
• ST-BY AND MUTE FEATURES
• SHORT CIRCUIT PROTECTION ACROSS
• THE LOAD
• THERMAL OVERLOAD PROTECTION
• EXTERNALLY SINCHRONIZABLE
• BRIDGE CONFIGURATION

TDA7490 sterio circuit diagram:

TDA7490 Audio Amplifier 2 x 25W / 1 x 50W circuit diagram

TDA7490 mono circuit diagram:

TDA7490 Audio Amplifier 2 x 25W / 1 x 50W mono circuit diagram

TDA7490 sterio circuit pcb:

TDA 7490 pcb layout 

25 W + 25 W stereo amplifier with mute and standby

Features:

• „ Wide supply voltage range (up to ±22.5 V)
• „ Split supply
• „ High output power 25 W + 25 W into 8 Ω with VS = ±20 V and THD = 10%
• „ No “pop” at turn on/off 
• „ Mute (“pop”-free) 
• „ Standby feature (low Iq) 
• „ Few external components
• „ Short-circuit protection 
• „ Thermal overload protection

Description:

The TDA7264 is class-AB dual audio power  amplifier assembled in a Multiwatt package.

It is specially designed for high-quality sound applications such as hi-fi music centers and 

stereo TV sets.

Circuit Diagram:

Circuit diagram for 25 W + 25 W stereo amplifier with mute and standby

Datasheet for TDA7264: Download

5Wx2 10Wx2 25Wx2 40Wx2 Dual BTL class-D power audio amplifier AD199x

GENERAL DESCRIPTION:

The AD199x is a two channel Bridge Tied Load (BTL)  switching audio power amplifier with integrated ∑∆ modulator.  The modulator accepts a 1Vrms input signal (maximum power)  and generates a switching waveform to drive speakers directly.  One of the two modulators can control both output stages  providing twice the current for single-channel applications. A digital, microcontroller-compatible interface provides control of reset, mute and PGA gain as well as output signals for thermal and over-current error conditions. The output stage can operate  from supply voltages ranging from 8V to 20V. The analog  modulator and digital logic operate from a 5V supply. 

• AD1990: 5Wx2 (10Wx1) 
• AD1992: 10Wx2 (20Wx1) 
• AD1994: 25Wx2 (50Wx1) 
• AD1996: 40Wx2 (80Wx1) 

FEATURES:

• Integrated Stereo Modulator & Power Stage 
• 0.005% THD+N 
• 101.5dB Dynamic Range 
• PSRR > 65 dB 
• RDS-ON < 0.3 Ω (per transistor) 
• Efficiency > 80% @ 5W/6 Ω 
• EMI Optimized Modulator 
• On-Off-Mute Pop Noise Suppression 
• Short Circuit Protection 
• Over-Temperature Protection 
• Low Cost DMOS Process 

APPLICATIONS:

• Flat Panel Televisions
• Automotive Amplifiers 
• PC Audio Systems 
• Mini Components 

Circuit Diagram:

Dual BTL class-D power audio amplifier  AD199x

Datasheet for AD199x: Download

Power stage 2 x 15 to 25 W class-D

FEATURES:

High efficiency (> 94 %)

Operating voltage from ±7.5 V to ±30 V

Very low quiescent current

High output power

Diagnostic output

Usable as a stereo Single-Ended (SE) amplifier

Electrostatic discharge protection (pin to pin)

No heatsink required.

APPLICATIONS:

Television sets

Home-sound sets

Multimedia systems

All mains fed audio systems.

GENERAL DESCRIPTION:

The TDA8925 is a switching power stage for a high efficiency class-D audio power amplifier system. With this power stage a compact 2 × 15 W self oscillating digital amplifier system can be built, operating with high efficiency and very low dissipation. No heatsink is required. The system operates over a wide supply voltage range from ±7.5 V up to ±30 V and consumes a very low quiescent current.

Circuit Diagram:

Circuit diagram for Power stage 2 x 15 to 25 W class-D

2 x 25 W Power amplifier for car radio TDA7376B

Features

High output power capability:
2 x 40 W max./ 4 
2 x 35 W/4  EIAJ
2 x 25 W/4  (14.4 V, 1 kHz, 10 %)
2 x 25 W/ 2 (14.4 V, 1 kHz, 10 %)
Differential inputs
Minimum external components count
Internally fixed gain (26 db)
Mute function (cmos compatible)
Automute at minimum supply voltage detection
Standby function
No audible pop during mute and standby operations
Clipping detector with programmable distortion threshold
short circuit (out to ground, out to supply voltage, across the load)
overrating chip temperature with soft thermal limiter
load dump voltage
fortuitous open ground 
loudspeaker dc current
ESD

Description

The TDA7376B is a new technology dual bridge audio amplifier in Multiwatt 15 package designed for car radio applications. Thanks to the fully complementary PNP/NPN output stage configuration the TDA7376B delivers a rail-to-rail voltage swing with no need of bootstrap capacitors. Differential input pairs, that will accept either single ended or differential input signals, guarantee high noise immunity making the device suitable for both car radio and car boosters applications.The audio mute control, that attenuates the output  signal of the audio amplifiers, suppresses pop On - Off transients and cuts any noises coming  from previous stages. The standby control, that de-biases the amplifiers, reduces the cost of the power switch. The on-board programmable distortion detector allows compression facility whenever the amplifier is over driven, so limiting the distortion at any levels inside the presettable range.

Circuit diagram:

2 x 35 W Power amplifier for car radio

PCB layout

pcb layout for TDA7376B Power amplifier for car radio

25 + 25W STEREO AMPLIFIER WITH MUTE/ST-BY

Features

• WIDE SUPPLY VOLTAGE RANGE (UP TO 50V ABS MAX.)
• SPLIT SUPPLY
• HIGH OUTPUT POWER: 25 + 25W @ THD =10%, RL = 8Ω, VS = +20V
• NO POP AT TURN-ON/OFF
• MUTE (POP FREE)
• STAND-BY FEATURE (LOW IQ)
• FEW EXTERNAL COMPONENTS
• SHORT CIRCUIT PROTECTION
• THERMAL OVERLOAD PROTECTION

Circuit Diagram

25 + 25W STEREO AMPLIFIER WITH MUTE/ST-BY

Layout:

PCB layout

High efficiency 2 × 25 W/4 Ω stereo car radio power amplifier

FEATURES

Low dissipation due to switching from Single-Ended (SE) to Bridge-Tied Load (BTL) mode

Differential inputs with high Common Mode Rejection Ratio (CMRR)

Mute/standby/operating (mode select pin)

Load dump protection circuit

Short-circuit safe to ground, to supply voltage and across load

Loudspeaker protection circuit

Offset detection for each channel

Device switches to single-ended operation at excessive junction temperatures

Thermal protection at high junction temperature (170°C)

Clip detection at THD = 2.5 %

Diagnostic information (clip/protection/prewarning/offset).

GENERAL DESCRIPTION

The TDA1564 is a monolithic power amplifier in a 17-lead single-in-line (SIL) plastic power package. It contains two identical 25 W amplifiers. The dissipation is minimized by switching from SE to BTL mode, only when a higher output voltage swing is needed. The device is primarily developed for car radio applications.

Circuit diagram:

Circuit diagram  stereo car radio power amplifier

PCB Layout:

pcb layout for High efficiency 2 × 25 W/4 Ω stereo car radio power amplifier

2 x 25 W audio amplifier circuit TDA1563Q

FEATURES

Low dissipation due to switching from Single-Ended (SE) to Bridge-Tied Load (BTL) mode

Differential inputs with high Common Mode Rejection Ratio (CMRR)

Mute/standby/operating (mode select pin)

Zero crossing mute circuit

Load dump protection circuit

Short-circuit safe to ground, to supply voltage and across load

Loudspeaker protection circuit

Device switches to SE operation at excessive junction temperatures

Thermal protection at high junction temperature (170°C)

Diagnostic information (clip detection and protection/temperature)

Clipping information can be selected between

THD = 2.5% or 10%

GENERAL DESCRIPTION

The TDA1563Q is a monolithic power amplifier in a 17-lead DIL-bent-SIL plastic power package. It contains two identical 25 W amplifiers. The dissipation is minimized by switching from SE to BTL mode when a higher output voltage swing is needed. The device is primarily developed for car radio applications.

Circuit Diagram:

Circuit diagram 2 x 25 W audio amplifier circuit TDA1563Q

Datasheet for TDA1563Q: Download: