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Showing posts with the label Class B

18W Class-B Audio Amplifier with Tone Controls

18W Class-B Audio Amplifier with Tone ControlsGeneral Description for 18W Class-B Audio Amplifier with Tone Controls The particular circuit configuration, allowed to push the NE5534 exceptional capacity of driving the output transistors near to its limits, enabling the whole amplifier to deliver relatively high power outputs without problems. Despite the complication added by the tone controls, the amplifier has an input sensitivity of 130mV RMS, allowing to connect directly to its input the most disparate audio sources without the need for a separate preamplifier. For this reason, it was possible to obtain 18W into an 8 Ohm load using a power supply voltage of +/- 20V. In order to satisfy repeated requests by correspondents, a medium power audio amplifier incorporating tone controls in the feedback path was finally designed.Total Harmonic Distortion figures are astonishingly low, much lower than comparable audio amplifiers using a single-IC audio amp. To avoid an excessive increase …

45 Watt Class B Amplifier

45 Watt Class B Amplifier Description 45W into 8 Ohm - 69W into 4 Ohm Easy to build - No setup required45 Watt Class B Amplifier Description


The main design targets for this amplifier were as follows:
Output power in the 40 - 70W rangeSimple circuitryEasy to locate, low cost componentsRugged performanceNo setup
These goals were achieved by using a discrete-components op-amp driving a BJT complementary common-emitter output stage into Class B operation. In this way, for small output currents, the output transistors are turned off, and the op-amp provides all of the output current. At higher output currents, the power transistors conduct, and the contribution of the op-amp is limited to approximately 0.7/R11. The quiescent current of the op-amp biases the external transistors, and hence greatly reduces the range of crossover.

The idea sprang up from a letter published on Wireless World, December 1982, page 65 written by N. M. Allinson, then at the University of Keele, Staffordshire.
In this l…

24 W BTL or 2 x 12 W stereo car radio power amplifier

General Description: The TDA1515BQ is a monolithic integrated class-B output amplifier in a 13-lead single in-line (SIL) plastic power package. The device is primarily developed for car radio applications, and also to drive low-impedance loads (down to 1,6 Ω). At a supply voltage VP = 14,4 V, an output power of 24 W can be delivered into a 4 Ω BTL (Bridge Tied Load), or, when used as stereo amplifier, it delivers 2 × 12 W into 2 Ω or 2 × 7 W into 4 Ω. 
Features: flexibility in use − mono BTL as well as stereohigh output powerlow offset voltage at the output (important for BTL)large usable gain variationvery good ripple rejectioninternal limited bandwidth for high frequencieslow stand-by current possibility (typ. 1 µA), to simplify required switches; TTL drive possiblelow number and small sized external componentshigh reliability.he following currently required protections are incorporated in the circuit. These protections also have positive influenceon reliability in the applications.loa…

10 + 10W Stereo Amplifier for car radio

General Description: The TDA2004A is a class B dual audio power amplifier in MULTIWATT package specifically designedforcar radioapplications; stereoamplifiersare easily designed using this device that provides a high current capability (up to 3.5 A) and that can drive very low impedance loads (down to 1.6Ω ).
Circuit diagram: Datasheet for TDA2004A:Download

4x12W car radio power amplifier

FEATURES: Requires very few external components High output power Fixed gain Diagnostic facility (distortion, short-circuit and temperature detection) Good ripple rejection Mode select switch (operating, mute and stand-by) Load dump protection AC and DC short-circuit safe to ground and to VP Low power dissipation in any short-circuit condition Thermally protected Reverse polarity safe Electrostatic discharge protection No switch-on/switch-off plop Flexible leads Low thermal resistance Identical inputs.
GENERAL DESCRIPTION:
The TDA8562Q is an integrated class-B output amplifier in a 17-lead single-in-line (SIL) power package. It contains 4 × 12 W single-ended amplifiers.
Circuit Diagram:

2 × 40 W/2 Ω stereo BTL car radio power amplifier

General description:
The TDA8566 is an integrated class-B output amplifier which is available in several packages. TDA8566TH is contained in a 20-lead small outline plastic package. The TDA8566TH1 is a 24-lead small outline plastic package which is pin compatible with the I2C-bus controlled amplifier TDA1566TH for one board layout. TDA8566Q is a 17-pinDIL-bent-SIL package. The device contains 2 amplifiers in a Bridge-Tied Load (BTL) configuration. The output power is 2 × 25 W in a 4 Ω load or 2 × 40 W in a 2 Ω load. It has a differential input stage and 2 diagnostic outputs. The device is primarily developed for car radio applications.
Features: Differential inputs Very high Common Mode Rejection Ratio (CMRR) High common mode input signal handling Requires very few external components High output power 4 Ω and 2 Ω load driving capability Low offset voltage at output Fixed gain Diagnostic facility (distortion, short-circuit and temperature pre-warning) Good ripple rejection Mode select switch (oper…

4 x 13 W single-ended power amplifiers

FEATURES
Requires very few external components High output power Fixed gain Diagnostic facility (distortion, short-circuit and temperature detection) Good ripple rejection Mode select switch (operating, mute and standby) AC and DC short-circuit safe to ground and to VP Low power dissipation in any short-circuit condition Thermally protected Reverse polarity safe Electrostatic discharge protection No switch-on/switch-off plop Flexible leads Low thermal resistance Identical inputs.
GENERAL DESCRIPTION
The TDA8511J is an integrated class-B output amplifier in a 17-lead DIL-bent-SIL power package. It contains 4 × 13 W single-ended amplifiers.

Circuit Diagram:

TDA1557Q 2 x 22w car radio power amplifier

FEATURES
Requires very few external components High output power Low offset voltage at output Fixed gain Good ripple rejection Mute/stand-by switch Load dump protection AC and DC short-circuit-safe to ground and VP Thermally protected Reverse polarity safe Capability to handle high energy on outputs (VP = 0) Protected against electrostatic discharge No switch-on/switch-off plop Flexible leads Low thermal resistance.
GENERAL DESCRIPTION
The TDA1557Q is a monolithic integrated class-B output amplifier in a 13-lead single-in-line (SIL) plastic power package. The device contains 2 × 22 W amplifiers in BTL configuration and has been primarily developed for car radio applications.
Circuit Diagram