Block Diagram for AN5275:
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| 15W x 2Ch Low Frequency Power Amplifier Circuit for TV |
9/02/2014
- Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
- Supply Voltage, V9−2 . . . . . . . . . . . . . . . . . . . . . . . . . 18V
- Supply Current, Itot . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2A
- Power Dissipation, PT . . . .. . . . . . . . . . . . . . . . . . . . . 4.5W
- Operating Ambient Temperature, Topr . . . . . . . . . . . . −20° to +70°C
- Storage Temperature, Tstg . . . . . . . . . . . . . . . . . . . . −55° to +150°C
- Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . 13V
- Output Power (RL = 4Ω), PO . . . . . . . . . . . . . . . . . . 4.4W
- Voltage Gain, GV . . . . . . . . . . . . . . . . . . . . . . . . . . . 45dB
Pin Connection:
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| Circuit Diagram 4.4 Watts Audio Power Amp |
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:
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| Dual BTL class-D power audio amplifier AD199x |
Datasheet for AD199x: Download
General Description:
Amplifier’s efficiency is 70%, distortions at cut frequency were at most 0.2% at 20Hz on 8 Ω and 10W. With a power supply of ± 30V the mosfet audio amplifier can deliver 45W on 8 Ω and 70w on 4 Ω. Remember that this audio amplifier is not protected on shortcircuits so everytime you switch on check to see if the speaker is connected.
Circuit Diagram:
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| 70W mosfet power amp irf9530 irf530 |
General Description:
Circuit Diagram:
- MPSA43 – NPN high voltage transistor with low current and high voltage used for telephony, professional communication equipment, and telephony, and is the complement type of MPSA93
- MJE350 – a plastic medium power PNP silicon transistor designed for use in line-operated applications such as low power, line-operated series pass and switching regulators requiring PNP capability with features of high collector-emitter sustaining voltage, excellent DC current gain, and plastic thermopad package
- IRFP240 – an N-channel enhancement mode silicon gate power field effect transistor with an advanced power MOSFET designed, tested, and guaranteed to withstand a specified level of energy in the breakdown avalanche mode of operation used in applications such as switching regulators, switching converters, motor drivers, relay drivers, and drivers for high power bipolar switching transistors requiring high speed and low gat drive power due to features of high input impedance, linear transfer characteristics, nanosecond switching speeds, limited power dissipation, and single pulse avalanche energy rated
The 60W MOSFET audio amplifier may be used in automotive sound systems, home theater entertainment systems, and audio-video receivers to continually improve the quality of the audio. redcircuits.com/Page100.htm
Circuit Diagram:
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| 60W MOSFET Audio Amplifier |
9/01/2014
General description:
The SA58672 is a mono, filter-free class-D audio amplifier which is available in a 9 bump WLCSP (Wafer Level Chip-Size Package) and 10-terminal HVSON packages. The SA58672 features shutdown control. Improved immunity to noise and RF rectification is increased by high PSRR and differential circuit topology. Fast start-up time and very small WLCSP package makes it an ideal choice for both cellular handsets and PDAs. The SA58672 delivers 1.7 W at 5 V and 800 mW at 3.6 V into 8 Ω. It delivers 3.0 W at 5 V and 1.6 W at 3.6 V into 4 Ω. The maximum power efficiency is excellent at 90 % into 8 Ω and 84 % to 88 % into 4 Ω. The SA58672 provides thermal and short-circuit shutdown protection.
Circuit Diagram:
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| 3.0 W mono class-D audio amplifier |
General description:
The SA58632 is a two-channel audio amplifier in an HVQFN20 package. It provides power output of 2.2 W per channel with an 8 Ω load at 9 V supply. The internal circuit is comprised of two BTL (Bridge-Tied Load) amplifiers with a complementary PNP-NPN output stage and standby/mute logic. The SA58632 is housed in a 20-pin HVQFN package, which has an exposed die attach paddle enabling reduced thermal resistance and increased power dissipation.
Circuit Diagram:
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| Circuit Diagram |
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200W Audio Amplifier Circuit
Circuit description: Connecting two TDA2030 thru cheap power transistors we can create a amplifier wich can deliver a higher power. Wi...
