9/29/2014

2 x 7 W stereo audio amplifier

General Description:
The TDA8944J is a dual-channel audio power amplifier with an output power of 2 × 7 W at an 8 Ω load and a 12 V supply. The circuit contains two Bridge Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic. The TDA8944J comes in a 17-pin DIL-bent-SIL (DBS) power package. The TDA8944J is printed-circuit board (PCB) compatible with all other types in the TDA894x family. One PCB footprint accommodates both the mono and the stereo products.
Circuit Diagram:
Circuit diagram

Datasheet for TDA8944: Download

2 x 15 W stereo Bridge Tied Load (BTL) audio amplifier

General description:
The TDA8946J is a dual-channel audio power amplifier with an output power of 2 × 15 W at an 8 Ω load and a 18 V supply. The circuit contains two Bridge Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic. The TDA8946J comes in a 17-pin DIL-bent-SIL (DBS) power package. The TDA8946J is printed-circuit board (PCB) compatible with all other types in the TDA894x family. One PCB footprint accommodates both the mono and the stereo products.

Features:

  • Few external components
  • Fixed gain
  • Standby and mute mode
  • No on/off switching plops
  • Low standby current
  • High supply voltage ripple rejection
  • Outputs short-circuit protected to ground, supply and across the load
  • Thermally protected
  • Printed-circuit board compatible
Circuit Diagram:
Circuit Diagram for 2 x 15 W stereo Bridge Tied Load (BTL) audio amplifier
PCB layout:
PCB layout TDA8946

Datasheet for TDA8946J: Download

Audio FM processor for VHS hi-fi audio

General Description:
The TDA9610H is a dual audio FM processing IC for VHS hi-fi audio, digitally controlled via the I2C-bus. The FM (de)modulator and peak noise reduction functions are highly integrated, resulting in few external components and adjustments.  In addition special functions for audio editing, mixing and dubbing have been implemented. 
Circuit Diagram:
Audio FM processor for VHS hi-fi audio
Datasheet for TDA9610H: Download

Dual channel TV FM intercarrier sound demodulator

General Description:
The TDA9821 is a monolithic, integrated, TV FM intercarrier sound demodulator for all FM standards. The circuit contains two separate FM demodulators using Phase Locked Loop (PLL) reference frequency generation. The circuit requires a minimum number of  external components.
Circuit Diagram:
Dual channel TV FM intercarrier sound demodulator
Datasheet for TDA9821: Download

AM-demodulator and audio source switch

General Description:
The TDA9830, a monolithic integrated circuit, is designed for AM-sound demodulation used in L- and L’-standard. The IC provides an audio source selector and also mute switch.
Circuit Diagram:
AM-demodulator and audio source switch
Datasheet for TDA9830: Download

TV and VTR stereo/dual sound processor with digital identification

General Description:
The TDA9847 is a stereo/dual sound processor for TV and VTR sets. Its identification ensures safe operation by using internal digital PLL technique with extremely small bandwidth, synchronous detection and digital integration (switching time maximum 2.0 s; identification concerning the main functions).
Circuit Diagram:
TV and VTR stereo/dual sound processor with digital identification
Datasheet for TDA9847: Download

SAP decoder and audio processor

The TDA9852 is a bipolar-integrated BTSC stereo decoder with hi-fi audio processor (I2C-bus controlled) for application in TV sets, VCRs and multimedia.

Circuit Diagram:
SAP decoder and audio processor

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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...

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