Showing posts with label Audio Power Amplifier. Show all posts
Showing posts with label Audio Power Amplifier. Show all posts

11/28/2017

Audio Power Amplifier IC LM Series

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Audio Power Amplifier 170W LM4651

The combination of the LM4651 driver IC and the LM4652 power MOSFET Class D power amplifier IC provides a high efficiency amplifier solution, suitable for self-powered speakers, subwoofers and quality car boosters.

The LM 4651 is a fully integrated conventional pulse width modulator (PWM) driver, containing undervoltage, short circuit, overmodulation, and thermal shutdown protection circuitry. The IC features a standby function which shuts down the pulse width modulation, minimizing supply current.

The LM 4652 is a fully integrated H-bridge Power Mosfet IC in a TO220 power package. The IC has a built in temperature sensor to alert the LM4651 when the die temperature exceeds the threshold limit.

Used together, the LM4651 and LM4652 form a simple, compact, efficient, high quality power audio amplifier solution complete with protection, normally seen only in Class AB amplifiers.



The maximum efficiency of this circuit is 85% at 125W with a standby attenuation greater than 100dB. The THD at 10W, 4 ohms, 10 - 500Hz is max. 0.3%. The supply voltage can not exceed ± 22V.



For the best performance a suitable preamplifier is required. With the addition of a preamplifier the gain of the power stage can be greatly reduced to improve performance. The gain should be set to 10 V/V allowing for low gain on the Class D stage with a total system gain high enough to be a complete solution for line level sources.

The input filter used here does not noticeably increase THD performance but will help to maintain a flat frequency response as the Q of the output filter changes with load impedance.



Do not attempt to build this amplifier as your first project! Class D high power amplifiers are expensive, difficult to build and a very small error during assembly can lead to total devastation of the power IC or other costly components.

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2/05/2015

60W+60W Audio Power Amplifier

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Features:

  • Pin compatible IC series that covers power ratings from 50 W × 2 channels to 180 W × 2 channels at 0.7 or 0.8% THD, 20 Hz to 20 kHz. This allows the use of a common PCB for all output classes. 
  • The pin arrangement is also unified with that of the three-channel STK413-000 series. This means that PCBs designed for three-channel models can also be used for two-channel models. 
  • Miniature package — 50 W/ch to 120 W/ch (THD = 0.8%, f = 20 Hz to 20 kHz): 64 × 36.5× 8.5 mm* — 150 W/ch to 180 W/ch (THD = 0.7%, f = 20 Hz to 20 kHz): 78 × 44× 9 mm* * Not including the IC pins. 
  • Allowable load shorted time: 0.3 s
Circuit Diagram:
60W+60W  Audio Power Amplifier
60W+60W  Audio Power Amplifier

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2/04/2015

150W+150W+150W audio power amplifier

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This IC is a hybrid designed to be used  in 150 W 3ch class AB  audio power amplifier.

150W+150W+150W audio power amplifier
150W+150W+150W audio power amplifier

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11/14/2014

30 Watt x 2 CH AUDIO POWER AMPLIFER

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TA8233H Circuit Diagram
30 Watt x 2 CH AUDIO POWER AMPLIFER
Circuit diagram for 30 Watt x 2 CH AUDIO POWER AMPLIFER

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9/10/2014

100W Audio Power Amplifier with Mute

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General Description:
The LM4732 is a stereo audio amplifier capable of typically delivering 50W per channel of continuous average output power into a 4Ω or 8Ω load with less than 10% THD+N from 20Hz - 20kHz. The LM4732 has short circuit protection and a thermal shut down feature that is activated when the die temperature exceeds 150˚C. The LM4732 also has an under voltage lock out feature for click and pop free power on and off. Each amplifier of the LM4732 has an independent smooth transition fade-in/out mute. The LM4732 has a wide operating supply range from +/-10V - +/-40V allowing for lower cost unregulated power supplies to be used. The LM4732 amplifiers can easily be configured for bridge or parallel operation for 100W mono solutions.
Circuit Diagram:
100W Audio Power Amplifier with Mute




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LM2002 8 Watt Audio Power Amplifier

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LM2002 8 Watt Audio Power Amplifier

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9/09/2014

Audio Power Amplifier with Built-in AGC AN12972A

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Overview:
Audio Power Amplifier with Built-in AGC AN12972A  Increasing volume settings when using small speakers  results in distortion as the output signal distorts at high  gain settings. The AN12972A audio power amplifier  features built-in automatic gain control (AGC) circuitry to minimize distortion by decreasing too high an input gain level. Using a low-noise amp minimizes noise even  when the speaker is placed close to an ear.

Features:

  • Built-in AGC circuitry if an input level is too high, the AGC is activated to minimize distortion, raising the  overall volume level and reducing noise.
  • Low noise amplifier.
  • Input circuit format accommodates different input signals (mixing possible)
  • Standby and speaker mute functions.
  • Small package.
  • Cellular phones, PDAs and other mobile equipment


Circuit Diagram:
Audio Power Amplifier with Built-in AGC AN12972A 

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9/03/2014

Audio Power Amplifier with Built-in AGC AN12972A

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Overview:

Audio Power Amplifier with Built-in AGC AN12972A  Increasing volume settings when using small speakers  results in distortion as the output signal distorts at high  gain settings. The AN12972A audio power amplifier  features built-in automatic gain control (AGC) circuitry  to minimize distortion by decreasing too high an input  gain level. Using a low-noise amp minimizes noise even  when the speaker is placed close to an ear.

Features:
  • Built-in AGC circuitry if an input level is too high, the  AGC is activated to minimize distortion, raising the  overall volume level and reducing noise.
  • Low noise amplifier.
  • Input circuit format accommodates different input signals (mixing possible)
  • Standby and speaker mute functions.
  • Small package.
  • Cellular phones, PDAs and other mobile equipment
Circuit Diagram:
Audio Power Amplifier with Built-in AGC AN12972A 


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9/02/2014

18W Audio Power Amplifier Circuit

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General Description:
The AN7170 is an integrated circuit manufactured by high voltage process designed for power amplifier of bus, track amplifier. Wide operating supply voltage range with output of 18W at 26.4V. It can be widely used for bus, truck amp., car stereo, home entertainment stereo set and TV sound multiplex output.

Circuit Diagram:
18W Audio Power Amplifier Circuit circuit diagram

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9/01/2014

4 x 45W Audio Power Amplifier

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General description:

The TDA8595 is a complementary quad Bridge Tied Load (BTL) audio power amplifier made in BCDMOS technology. It contains four independent amplifiers in BTL configuration. Through the I2C-bus, diagnosis of temperature warning and clipping level is fully programmable and the information available via two diagnostic pins is selectable. The status of each amplifier (output offset, load or no load, short-circuit or speaker incorrectly connected) can be read separately.

Features and benefits:

  • Operates in legacy mode (non I2C-bus) and I2C-bus mode (3.3 V and 5 V compliant)
  • Three hardware-programmable I2C-bus addresses
  • Drive 4  or 2  loads
  • Speaker fault detection
  • Independent short-circuit protection per channel
  • Loss of ground and open VP safe (with 150 m series impedance and a supply  decoupling capacitor of 2200 F maximum)
  • All outputs short-circuit proof to ground, supply voltage and across the load
  • All pins short-circuit proof to ground
  • Temperature-controlled gain reduction to prevent audio holes at high junction temperatures
  • Low battery voltage detection
  • Offset detection
  • This part has been qualified in accordance with AEC-Q100
Circuit Diagram:
Circuit Diagram for 4 x 45W Audio Power Amplifier
Datasheet for TDA8595: Download
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