Showing posts with label PCB. Show all posts
Showing posts with label PCB. Show all posts

10/10/2017

TDA8922 Audio Amplifier 2x25W

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TDA8922 general description:


The TDA8922 is a high efficiency class-D audio power amplifier with very low dissipation. The typical output power is 2 × 25 W. The device is available in the HSOP24 power package with a small internal heatsink and in the DBS23P through-hole power package. Depending on the supply voltage and load conditions, a very small or even no external heatsink is required. The amplifier operates over a wide supply voltage range from ±12.5 to ±30 V and consumes a very low quiescent current.


TDA8922 features:


  • High efficiency (∼90%)
  • Operating supply voltage from ±12.5 to ±30 V
  • Very low quiescent current
  • Low distortion
  • Usable as a stereo Single-Ended (SE) amplifier or as amono amplifier in Bridge-Tied Load (BTL)
  • Fixed gain of 30 dB in Single-Ended (SE) and 36 dB in
  • Bridge-Tied Load (BTL)
  • High output power
  • Good ripple rejection
  • Internal switching frequency can be overruled by an external clock
  • No switch-on or switch-off plop noise
  • Short-circuit proof across load and to supply lines
  • Electrostatic discharge protection
  • Thermally protected.

TDA8922 applications:


  • Television sets
  • Home-sound sets
  • Multimedia systems
  • All mains fed audio systems
  • Car audio (boosters).

TDA8922 amplifier diagram, circuit:


TDA8922 pcb layout:



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10/08/2017

LM3886 Audio Amplifier 1 x 108W

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LM3886 general description:

According to National Semiconductor, the LM3886 is a high performance 150W Audio Power Amplifier with Mute. The performance of the LM3886, say NS, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPIKe) protection circuitry, puts in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). The LM3886T comes in an 11 (staggered-) lead non-isolated TO220 package.
We put the LM3886T schematic and an existing printed circuit board as a basis. For test purposes, the prototype of the amplifier was powered by a stabilized ±35-V supply. A maximum undistorted output power of about 63 watts into 8 ohms was obtained at a drive level of 1 Vrms. Dropping the load impedance to 4 ohms pushed the output power to no less than 108 watts. In practice, these power levels can be taken to mean ‘music power’, but do remember that the amplifier will not normally be powered from a regulated supply!


Great attention should be paid to the cooling of the amplifier IC. The cooling capacity offered by a heatsink as specified in the parts list is really only sufficient for load impedances of 6 ohms or more. Even if a heatsink with a thermal resistance lower than 1 K/W is employed, the amplifier IC will cause a ‘hot spot’ on the heatsink surface where the actual thermal resistance is much higher locally than the specification! With this in mind, it is recommended to drop the supply voltage to about ±30 V if the amplifier is used to drive a 4-ohm load. Also, bear in mind that heatsink isolating materials like mica and even ceramics tend to raise the thermal resistance by 0.2 K/W to 0.4 K/W. The metal tab at the back of the IC is at the negative supply potential.

Boucherot network C6-R6 is not normally required in this application, and should be omitted unless the amplifier is found to be unstable as a result of an application which is widely different from the one shown here. Populating the amplifier board itself will be a piece of cake, and most of the time required to build the amplifier will go into drilling, cutting, mounting and isolating the heatsink. Note that the radial electrolytic capacitors are rated at 40 volts, so you have to make sure that the supply voltage can never exceed that level. The performance of the prototype amplifier built and tested in our design lab is expressed by the Specifications box.


LM3886 circuit diagram:

LM3886 circuit diagram

LM3886 layout, pcb:

LM3886 layout and pcb

LM3886 part list:

LM3886 partlist

Datasheet for LM3886: Download
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10/02/2017

TDA7294 Audio Amplifier 2 x 80W

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TDA7294 general description:
This circuit described here uses two cis tda 7294 for use in stereo (2 x 80Watts) or bridge mode (1x 180 Watts), to configure this setting just four jumpers. To facilitate mounting the circuit has power supply attached. The power is kind of simple symmetrical with a bridge rectifier 6A, and two large electrolytic capacitors , 10000μF the 22000μF/50v. This Power supply will for the two modules. The processor is recommended 22-0-22 to 28-0-28 / 5A, depending on the quality of the transformer is recommended at least 6 amps of current.



TDA7294 features:
  • High power performances with limited supply voltage level.
  • Considerably high output power even with high load values (i.e. 16 Ohm).
  • Rl= 8 Ohm, 
  • Vs = ±25V 
  • Pmax = 150 W
  • Rl=16Ohm, 
  • Vs = ±35V 

TDA7294 circuit diagram:
TDA7294 circuit diagram


TDA7294 layout:
TDA7294 layout
TDA7294 pcb:
TDA7294 pcb


Datasheet for TDA7294: Download

Searches related to TDA7294 Audio Amplifier Circuits

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5/04/2015

STK4221 Audio Amplifier 2x80w

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STK4221 general description:

The STK4221II IC from SANYO is a dual high power amplifier chip, preferably suited for compact high power audio applications, for example in cars and luxury transport vehicle audio systems. The chip provides a hassle free stereo output through a single package and a hand full of few external components, making the construction of this circuit rather easy and straightforward. However since the idea presented here does not include a CD or a memory card driver circuit, the input may be derived from readymade audio sources like an ipod, CD walkman, cellphone etc. The circuit discussed here is intended specifically for car audio applications and provides a simple alternative for 
making a 100 watt car stereo amplifier circuit. The diagram may be understood with the following points: An RC network formed by R5, R6 and C3, C4 together helps to reduce and filter stray frequency interferences and is therefore included at the input of the amplifiers. Capacitors C5 and C6 are the coupling capacitors used for blocking DC. The values of these capacitors are chosen such that it does not introduce high reactance levels at low frequencies. This particularly helps to reduce the influence of the input interference noises over the signal source resistance. The value of these capacitors may also be optimized for reducing the “pop” noise when power is switched ON.

STK4221 features:

  • Quiescent current ICCO VCC = ±54V 20 40 100 mA
  • Output power POTHD = 0.4%, f = 20Hz to 20kHz 80 W
  • Total harmonic distortion THD PO = 1.0W, f = 1kHz 0.3 %
  • Frequency response fL, fH PO = 1.0W, dB 20 to 50k Hz
  • Input impedance ri PO = 1.0W, f = 1kHz 55 kΩ
  • Output noise voltage VNO VCC = ±54V, Rg = 10kΩ 1.2 mVrms
  • Neutral voltage VN VCC = ±54V -70 0 +70 mV
  • Muting voltage VM -2 -5 -10 V

STK4221 circuit diagram: 

STK4221 Audio Amplifier 2x80w
STK4221 Audio Amplifier 2x80w

STK4221 pcb layout:


STK4221 Audio Amplifier 2x80w
STK4221 Audio Amplifier 2x80w

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4/29/2015

TDA7594 Audio Amplifier 50W

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TDA7594 general description:


    The Type IC TDA7294 from SGS-Thomson is an integrated a.f. amplifier intended for use in all sorts of hi-f application. According to the manufacturer's data sheets, chip can deliver outputs of up to 100 watt. Considering other properties, such as low noise, low distortion and reliable short-circuit and thermal protection circuits as well, the chip is indeed an interesting one. Moreover, with peak supply voltages of ±40 V and a load impedance of 4 ohm, the maximum dissipation of the IC TDA7294 will easily be exceeded. For these reasons, the supply in the present amplifier has been kept down to a safe ±30 V. At these voltages, the chip delivers, without any difficulty, 50 W into an 8 ohm load and 80 W into a 4 ohm load. These are still very respectable figures, particularly in view of the reasonable IC price. The circuit diagram of the amplifier in shows that the IC TDA7294 needs only a small number of external components. The input signal is applied to pin 3 via capacitor C1 and low-pass filter R6-C10. The filter improves the pulse response and flattens the frequency response. For maximum output offset, the values of R1 and R3 should be equal, so that the input impedance is 10k. The roll-off frequencies of R1-C1 and R2-C2 determine the lower bandwidth limit of the amplifier: with values a specified, this is about 16 Hz. The upper -3 dB point is at about 100 kHz.The amplifier is muted by a relevant input to pin 10 and placed in the stand-by mode by a relevant signal at pin 9. Muting should always take place before the stand-by mode is selected. Connecting the mute and standby pins permanently to the supply line ensures that the amplifier comes on immediately the power is switched on. Any switch-on clicks may be eliminated by increasing time constants R3-C4 and R5-C5. If large-value electrolyte capacitors are used in the power supply, switching off will be rather slow. It is best to build the amplifier on the printed-circuit board shown below. Insulating material between the heat sink and the IS is. The amplifier will have good performance with toroidal mains transformer, a 25A bridge rectifier and two 10.000uf,50 V electrolytic capacitors.
TDA7594 Circuit diagram:

 

MUTE and ST-BY utilization:

TDA7594 pcb layout:
Datasheet for TDA7594: Download - No
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4/28/2015

TDA1562Q Audio Amplifier 50W

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 TDA1562Q general description:

Philips designers have further improved a number of properties of the IC, among which the power output. According to the Philips datasheet, the improved device, the TDA1562Q, can deliver 70 watts into 4 ohms, but that is at the cost of the distortion, which at 10 per cent is rather too high, even for in a car. The prototype of the design described in this article provides 54 watts into 4 ohms at 1 per cent distortion. Since the number of requisite external components is smaller than in the case of the earlier device, the printed-circuit board is even more compact than that for the February 1995 amplifier.


 TDA1562Q features:


  • Low power dissipation during reproduction of music signals
  • Proof against short-circuits
  • Protection against excessive temperatures
  • Standby switch
  • No power-on or power-off clicks
  • Visible error indication
  • Measurement results (at Ub=14.4 V)
  • Supply voltage 8–18 V
  • Sensitivity 760 mV r.m.s.
  • Input impedance 70 kΩ
  • Power output 54 W r.m.s. into 4 Ω (f=1 kHz; THD+N=1%)
  • Harmonic distortion (THD+) at 1 W into 4 Ω: 0.046% (1 kHz)0.29% 20Hz) at 35 W into 4 Ω: 0.12% (1 kHz) 0.7% (20 kHz)
  • Signal-to-noise ratio (with 1 W into 4 Ω) 88 dBA
  • Power bandwidth 7.5 Hz – 185 kHz (at 25 W into 4 Ω)
  • Quiescent current about 135 mA (‘on’)


TDA1562Q applications:


  • Television sets
  • Home-sound sets
  • Multimedia systems
  • All mains fed audio systems
  • Car audio (boosters).

TDA1562Q amplifer diagram:


TDA1562Q pcb:


TDA1562Q part lists:

  • R1= 1MΩ
  • R2 = 4kΩ7
  • R3 = 1kΩ
  • R4 = 100kΩ
  • Capacitors:
  • C1,C2 = 470nF
  • C3,C4 = 10µF 63V radial
  • C5,C6,C8 = 4700µF 25V radial
  • (18mm max. dia., raster 7.5 mm)
  • C7 = 100nF, raster 5 mm
  • Semiconductors:
  • D1 = high-efficiency-LED
  • IC1 = TDA1562Q (Philips)
  • Miscellaneous:
  • S1 = single-pole on/off switch
  • Four spade connectors, PCB mount
  • Heatsink for IC1 (Rth<2.5 K/W)
  • PCB, order code 000004-1 (see Readers Services pages)
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TDA7560 Audio Amplifier 4x50W

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TDA7560 general description:



TDA7560 is a 4 x 45W QUAD BRIDGE car audio amplifier plus HSD. The TDA7560’s inputs are ground-compatible and can stand very high input signals (± 8Vpk) without any performances degradation. If the standard value for the input capacitors (0.1mF) is adopted, the low frequency cut-off will amount to 16 Hz. The TDA7560 is a breakthrough BCD (Bipolar / CMOS / DMOS) technology class AB Audio Power Amplifierin Flexiwatt 25 package designed for high power car radio. The fully complementary P-Channel/N-Channel output structure allows a rail to rail output voltage swing which, combined with high output current and minimised saturation losses sets new power references in the car-radio field, with unparalleled distortion performances.

TDA7560 features:

  • 4 x 50W/4W MAX.
  • 4 x 45W/4W EIAJ
  • 4 x 30W/4W @ 14.4V, 1KHz, 10%
  • 4 x 80W/2W MAX.
  • 4 x 77W/2W EIAJ
  • 4 x 55W/2W @ 14.4V, 1KHz, 10%
  • EXCELLENT 2W DRIVING CAPABILITY
  • HI-FI CLASS DISTORTION
  • LOW OUTPUT NOISE

TDA7560 amplifier circuit diagram:

TDA7560 Audio Amplifier 4x50W
TDA7560 Audio Amplifier 4x50W

TDA7560 layout:

pcb layout TDA7560 Audio Amplifier 4x50W
pcb layout for TDA7560 Audio Amplifier 4x50W
pcb layout TDA7560 Audio Amplifier 4x50W
pcb layout TDA7560 Audio Amplifier 4x50W

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4/27/2015

TDA8922 Audio Amplifier 2 x 25W

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TDA8922 general description:



The TDA8922 is a high efficiency class-D audio power amplifier with very low dissipation. The typical output power is 2 × 25 W. The device is available in the HSOP24 power package with a small internal heatsink and in the DBS23P through-hole power package. Depending on the supply voltage and load conditions, a very small or even no external heatsink is required. The amplifier operates over a wide supply voltage range from ±12.5 to ±30 V and
consumes a very low quiescent current. TDA8922 Audio Amplifier 2 x 25W


TDA8922 features:
  • High efficiency (∼90%)
  • Operating supply voltage from ±12.5 to ±30 V
  • Very low quiescent current
  • Low distortion
  • Usable as a stereo Single-Ended (SE) amplifier or as a mono amplifier in Bridge-Tied Load (BTL)
  •  Fixed gain of 30 dB in Single-Ended (SE) and 36 dB in Bridge-Tied Load (BTL)
  • High output power
  • Good ripple rejection
  • Internal switching frequency can be overruled by an external clock
  • No switch-on or switch-off plop noise
  • Short-circuit proof across load and to supply lines
  • Electrostatic discharge protection
  • Thermally protected.

TDA8922 aplications:
  • Television sets
  • Home-sound sets
  • Multimedia systems
  • All mains fed audio systems
  • Car audio (boosters).

TDA8922 circuit:



Circuit diagram TDA8922 Audio Amplifier 2 x 25W
Circuit diagram TDA8922 Audio Amplifier 2 x 25W
TDA8922 layout and pcb:
pcb layout TDA8922 Audio Amplifier 2 x 25W
pcb layout TDA8922 Audio Amplifier 2 x 25W

TDA8922 datasheet:


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TDA7482 Audio Power Amplifier 1-channel 1 x 25W

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TDA7482 general description:



The TDA7482 is an audio class-D amplifier assembled in Multiwatt15 package specially designed for high efficiency applications mainly for TV and HomeStereo sets. TDA7482 Audio Amplifier 1 x 25W

TDA7482 features:



  • 25W OUTPUT POWER:
  • RL =8Ω/4Ω; THD = 10%
  • HIGHEFFICIENCY
  • WIDE SUPPLY VOLTAGE RANGE (UP TO±25V)
  • SPLITSUPPLY
  • OVERVOLTAGEPROTECTION
  • ST-BY AND MUTEFEATURES
  • SHORTCIRCUIT PROTECTION
  • THERMALOVERLOADPROTECTION

TDA7482 circuit diagram:

TDA7482 Audio Amplifier 1 x 25W
TDA7482 Audio Amplifier 1 x 25W circuit diagram

TDA7482 sterio circuit layout:

PCB layout TDA7482 Audio Amplifier 1 x 25W
TDA7482 Audio Amplifier 1 x 25W pcb layout

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LM386N Audio Power Amplifer Amplifier 1x2W

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LM386N general description:


The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value up to 200. The inputs are ground referenced while the output is automatically biased to one half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 volt supply, making the LM386 ideal for battery operation. LM386N Audio Amplifier 1x2W

LM386N features:

  • Battery operation
  • Minimum external parts
  • Wide supply voltage range: 4V–12V or 5V–18V
  • Low quiescent current drain: 4mA
  • Voltage gains from 20 to 200
  • Ground referenced input
  • Self-centering output quiescent voltage
  • Low distortion: 0.2% (AV = 20, VS = 6V, RL = 8Ω, PO =
  • 125mW, f = 1kHz)
  • n Available in 8 pin MSOP package

LM386N circuit diagram:

<h2>LM386N Audio Amplifier 1x2W</h2>
LM386N Audio Amplifier 1x2W

LM386N layout:

LM386N pcb layout
LM386N pcb layout

LM386N pin layout:

LM386N pin layout:
LM386N pin layout:

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NCP2890 Audio Amplifier 1W

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NCP2890 general description:

The NCP2890 is an audio power amplifier designed for portable communication device applications such as mobile phone applications. The NCP2890 is capable of delivering 1.0 W of continuous average power to an 8.0 BTL load from a 5.0 V power supply, and 320 mW to a 4.0 BTL load from a 2.6 V power supply. The NCP2890 provides high quality audio while requiring few external components and minimal power consumption. It features a low−power consumption shutdown mode, which is achieved by driving the SHUTDOWN pin with logic low. The NCP2890 contains circuitry to prevent from “pop and click” noise that would otherwise occur during turn−on and turn−off transitions. For maximum flexibility, the NCP2890 provides an externally controlled gain (with resistors), as well as an externally controlled turn−on time (with the bypass capacitor). Due to its excellent PSRR, it can be directly connected to the battery, saving the use of an LDO. This device is available in a 9−Pin Flip−Chip CSP (standard Tin−Lead and Lead−Free versions) and a Micro8 package. NCP2890 Audio Amplifier 1W

NCP2890 features:

  • 1.0 W to an 8.0  BTL Load from a 5.0 V Power Supply
  • Excellent PSRR: Direct Connection to the Battery
  • “Pop and Click” Noise Protection Circuit
  • Ultra Low Current Shutdown Mode
  • 2.2 V−5.5 V Operation
  • External Gain Configuration Capability
  • External Turn−on Time Configuration Capability
  • Up to 1.0 nF Capacitive Load Driving Capability
  • Thermal Overload Protection Circuitry
  • AEC−Q100 Qualified Part Available
  • Pb−Free Packages are Available
  • NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes

NCP2890 aplications:

  • Portable Electronic Devices
  • PDAs
  • Wireless Phones

NCP2890 circuit diagram: 

NCP2890 Audio Amplifier 1W
Circuit diagram NCP2890 Audio Amplifier 1W

NCP2890 layout pcb: 

PCB layout NCP2890 Audio Amplifier 1W
PCB layout NCP2890 Audio Amplifier 1W

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TDA8560Q Audio amplifier 2x40W

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TDA8560Q general description:

Unfortunately, some of the proposed scheme in the network and even a scheme recommended by the developer (Philips), fail to achieve the desired result. As an example of how not to suggest that you include the TDA8560 material published on Online Soldering: Car Amplifier 2x40 Watt (I should note that everything except the input circuits and the number of points on diet, still deserves attention). the initial inclusion of IMS (at power up, the load is connected and there is no input signal) can throw you into a state of perplexity / mild shock (it depends on the degree of hope is for your TDA). Chip is unstable, there are noises when the input signal is amplified last weakly and passed with distortions. IC bypass surgery fixed resistor at the input, the other measures in consultation with the source device does not help. Why and what to do? Really caught Palen chip and will have to buy a new one? Not so fast! The fact that Philips did not include measures to prevent the self-excitation of the IC, but I think they know about it, but do not tell anyone (not good, gentlemen!) Rid chip excitement can (and should) in a way that is not described here. This is so far, my little secret. Usually TDA8560 include approximately recommend the following scheme: TDA8560Q Audio amplifier 2x40W

TDA8560Q Features:

  • Supply voltage: 6 - 18; typical 14.4 V.
  • The peak output current: 7.5 A.
  • The current in idle mode: 120 mA.
  • Long-term power output, with
  • RL = 4 ohms, THD = 10%, F = 1 kHz, 25 W,
  • RL = 2 ohms, THD = 10%, F = 1kHz: 40W.
  • Voltage gain, Au: 40 dB.
  • Input Impedance: 30 ohms.
  • Input Sensitivity: 100 mV.
  • Frequency response: 20 - 20000 Hz.
  • Requires very few external components
  • High output power
  • Low output offset voltage
  • Fixed gain
  • Diagnostic facility (distortion, short-circuit and temperature detection)
  • Good ripple rejection
  • Mode select switch (operating, mute and standby)
  • Load dump protection
  • Short-circuit safe to ground, to VP and across the load
  • Low power dissipation in any short-circuit condition
  • Thermally protected
  • Reverse polarity safe
  • Electrostatic discharge protection
  • No switch-on/switch-off plop
  • Flexible leads
  • Low thermal resistance.

TDA8560Q amplifier diagram, circuit:

TDA8560Q amplifier diagram, circuit
TDA8560Q amplifier diagram, circuit

TDA8560Q layout:

TDA8560Q amplifier Layout
TDA8560Q amplifier Layout

TDA8560Q amplifier pcb
TDA8560Q amplifier pcb

Datasheet for TDA8560Q: Download

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2/12/2015

TDA1566 Audio Amplifier 2x46W / 1x92W

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TDA1566 general description:



The TDA1566 is a car audio power amplifier with a complementary output stage realized in BCDMOS. The TDA1566 has two Bridge Tied Load (BTL) output stages and comes in a HSOP24 or DBS27P package. The TDA1566 can be controlled with or without I2C-bus. With I2C-bus control gain settings per channel and diagnostic trigger levels can be selected. Failure conditions as well as load identification can be read with I2C-bus. The load identification detects whether the outputs of a BTL channel are connected with a DC or AC load and discriminates between a speaker load, a line driver load and an open (unconnected) load. The TDA1566 can be configured in a single BTL mode and drive a 1 Ω load. For the single BTL mode it is necessary to connect on the Printed-Circuit Board (PCB) the outputs of both BTL channels in parallel.  TDA1566 Audio Amplifier 2x46W / 1x92W

TDA1566 features:


  • Operates in I2C-bus mode and non-I2C-bus mode
  • TH version: four I2C-bus addresses controlled by two pins; J version: two I2C-busaddresses controlled by one pin
  • Two 4 Ω or 2 Ω capable BTL channels or one 1 Ω capable BTL channel
  • Low offset
  • Pop free off/standby/mute/operating mode transitions
  • Speaker fault detection
  • Selectable gain (26 dB and 16 dB)
  • In I2C-bus mode:
  • DC load detection: open, short and speaker or line driver present
  • AC load (tweeter) detection
  • Programmable trigger levels for DC and AC load detection
  • Per channel programmable gain (26 dB and 16 dB, selectable per channel)
  • Selectable diagnostic levels for clip detection and thermal pre-warning
  • Selectable information on the DIAG pin for clip information of each channelseparately and independent enabling of thermal-, offset- or load fault
  • Independent short-circuit protection per channel
  • Loss of ground and open VP safe
  • All outputs short-circuit proof to VP, GND and across the load
  • All pins short-circuit proof to ground
  • Temperature controlled gain reduction at high junction temperatures
  • Fault condition diagnosis per channel: short to ground, short to supply, shorted leadand speaker fault (wrongly connected)
  • Low battery voltage detection
  • TH version: pin compatible with the TDA8566TH1

TDA1566 circuit:

TDA1566 Audio Amplifier 2x46W
TDA1566 Audio Amplifier 2x46W


TDA1566 Audio Amplifier 2x46W
TDA1566 Audio Amplifier 2x46W

TDA1566 layout:

TDA1566 Audio Amplifier 2x46W layout
TDA1566 Audio Amplifier 2x46W layout
TDA1566 Audio Amplifier 2x46W pcb
TDA1566 Audio Amplifier 2x46W pcb


TDA1566 Audio Amplifier 2x46WTDA1566 Audio Amplifier 2x46W pcb
TDA1566 Audio Amplifier 2x46WTDA1566 Audio Amplifier 2x46W pcb


TDA1566 Audio Amplifier 2x46W pcb
TDA1566 Audio Amplifier 2x46W pcb



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