TDA8932 Audio Amplifier 2x15 W

 TDA8932 general description:

The TDA8932 is a high efficiency class-D amplifier with low power dissipation. The typical output power is 2 × 15 W in stereo half-bridge application (RL = 4 Ω) or 1 × 30 W typical in full-bridge application (RL = 8 Ω). Due to the low power dissipation the device can be used without any external heat sink when playing music. If proper cooling via the printed-circuit board is implemented, a continuous output power of 2 × 15 W is feasible. Due to the implementation of thermal foldback, even for high supply voltages and/or lower load impedances, the device remains operating with considerable music output power without the need for an external heat sink. The device has two full-differential inputs driving two independent outputs. It can be used as mono full-bridge configuration (BTL) or as stereo half-bridge configuration (SE).

TDA8932 features:

• Operating voltage from 10 V to 36 V asymmetrical or ±5 V to ±18 V symmetrical
• Mono-bridged tied load (full-bridge) or stereo single-ended (half-bridge) application
• Application without heatsink using thermally enhanced small outline package
• High efficiency and low-power dissipation
• Thermally protected and thermal foldback
• Current limiting to avoid audio holes
• Full short-circuit proof across load and to supply lines (using advanced current protection)
• Switchable internal or external oscillator (master-slave setting)
• No pop noise
• Full-differential inputs

TDA8932 applications:

• Flat panel television sets
• Flat panel monitor sets
• Multimedia systems
• Wireless speakers
• Mini and micro systems
• Home sound sets

TDA8932 amplifier circuit, diagram:

LA4440 Audio Amplifier 2x6w / 1x19W

LA4440 general description:

So it's a very simple audio amplifier based on the LA4440 Integrated Circuits and this will take your computer’s headphone level output and amplify it to drive a pair of external speakers. This project is destinated for all that are listening to music or movies on laptops and computers or car. This circuit uses an LA4440 and some supporting components to give you much more power, while retaining a small package that you can use. The IC is a dual channel audio power amplifier, with low distortion, and a good frequency range.

Using 2 channels, the LA4440 will output 6 watts per channel, that can drive much larger speakers than a laptop can hold. When you set up a small enclosure(s), a 12V power supply, and an audio jack connection to the laptop you’ll have a nice enhancement to your laptop audio enjoyment.

LA4440 features:

• Built-in 2 channels (dual) enabling use in stereo and bridge
• amplifier applications.
• Dual : 6W×2 (typ.)
• Bridge : 19W (typ.)
• Minimun number of external parts required.
• Small pop noise at the time of power supply ON/OFF and good starting balance.
• Good ripple rejection : 46dB (typ.)
• Good channel separation.
• Small residual noise (Rg=0).
• Low distortion over a wide range from low frequencies to high frequencies.
• Easy to design radiator fin.
• Built-in audio muting function.
• Built-in protectors.
• Thermal protector
• Overvoltage, surge voltage protector
• Pin-to-pin short protector

LA4440 specification:

LA4440 circuit diagram sterio:

Stereo Circuit diagram for LA4440 Audio Amplifier 2x6w / 1x19W

LA4440 circuit diagram bridge:

Bridge Circuit diagram for LA4440 Audio Amplifier 2x6w / 1x19W

LA4440 layout:

PCB Layout Circuit diagram for LA4440 Audio Amplifier 2x6w / 1x19W

TDA8551 Audio Ampllifier 1 x 1 W

TDA8551 general description:

The TDA8551; TDA8551T is a one channel 1 W  Bridge-Tied Load (BTL) audio power amplifier capable of  delivering 1 W output power to an 8 Ω load at THD = 10%  using a 5 V power supply. The circuit contains a BTL  power amplifier, a digital volume control and standby/mute  logic. The TDA8551T comes in an 8 pin SO package and the TDA8551 in a 8 pin DIP package.

TDA8551 features:

• One pin digital volume control
• Volume setting with UP/DOWN pulses
• Flexibility in use
• Few external components
• Low saturation voltage of output stage
• Standby mode controlled by CMOS compatible levels
• Low standby current
• No switch-on/switch-off plops
• High supply voltage ripple rejection
• Protected against electrostatic discharge
• Outputs short circuit safe to ground, VP and across the load
• Thermally protected.

TDA8551 aplications:

• Portable consumer products
• Personal computers
• Telephony

TDA8551 circuit diagram:

Circuit diagram TDA8551 Audio Ampllifier 1 x 1 W

TDA8551 pcb layout:

PCB layout Circuit diagram TDA8551 Audio Ampllifier 1 x 1 W