AmplifierCircuits

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 s...

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

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

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

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

LM2002 8 Watt Audio Power Amplifier

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 

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 

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

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 sho...