The BTL Class-D power amplifier uses the TDA8920 Chip Amp, more precisely the TDA8920CTH for the SMD version, and on the following occasion, I will share the schema in PDF file format along with the PCB Layout for the SMD component version, which you can download at the end of the post.
This Class-D Power Amplifier has a pretty good power efficiency and is anticipated to be of very little power. Besides this TDA8920 amplifier is also wide for the supply voltage, it can be supplied from 12.5VDC to 30VDC symmetrically. This amplifier also has quite complete features that are already "built-in" inside the chip itself. These features include Over Current Protection, Current Limiter, Under Voltage Protection, Over Voltage Protection. The power that can be generated by this amplifier 100W RMS per channel in BTL 200W RMS, it can be seen in the datasheet.
The following is the BTL TDA8920 amplifier circuit scheme that I schemed at EasyEDA:
From the schematic above, I add Oscillator power amplifier using LTC6905CS5-80, if you are having trouble finding LTC6905CS5-80, the BTL TDA8920 amplifier circuit can also be made in self-oscillation mode by adding a 22K Ohm resistor 7 pined to VSSA voltage (V-)
Following is the scheme for self oscilation mode.
And to facilitate assembly, I have also made a double layer version of the PCB layout which you can download at the link below, this PCB layout version is the oscillator mode so to use the self OSC mode, the oscillator section does not need to be filled directly with jumpers as in the Self OSC scheme above.
Below the video assembly and test:
Download BTL TDA8920 200W Power Amplifier Class-D:
Hello, friends in this post I will make a Class-D Fullbirdge D2K project designed by Mr. Kartino S. which I will design the PCB using SMD components, but not all of them use SMD components, some components still use through-hole or DIP components. Let's look at the scheme of the Classbridge D-D2K Fullbridge power amplifier below.
The input balance circuit that uses a dual op-amp IC. I use the MC33078 low noise op-amp. Then the comparator uses TL071 IC, Level shifter uses Transistor 2n5401. For the IC logic it uses CD4049, then the MOSFET driver uses IR2110 IC, for the totem-pole I use Transistor BD139.140.
For MOSFETs and Low Pass filter circuits like this. I will explain more in detail after the PCB is there and begin to be assembled.
For features, I added DC Protection, which functions to disconnect the speaker relay if the output exceeds DC More than 3V.
Then there are signal indicators, clips, protection, and On. I also added this OCP or Over Current Protection, which functions to turn off the PWM signal and disconnect the speaker relay if there is an overload. and OCP I made fixed.
I also added an LED + LDR limiter whose sensor is from the amplifier's output clip signal itself, so this circuit to put the limit on the output before the clip occurs. So, making this amplifier will rarely clip even at all, depending on the settings desired. Because this limiter has settings, it can set a maximum output as desired, for example, only want to come out 100W RMS can. For the settings later I will explain in another post.
I have designed this PCB layout before, oh yes I am using the easyeda.com application, if you want to try this project I will share the link : D2K Fullbridge SMD Project work
The dimensions of this PCB are 10x18.6 cm. mini enough for the size of a full-bridge class-d amplifier. mini dimension because using some SMD components, I choose SMD components in certain parts, the part where the components are only passed by small currents and through-hole for currents and large power dissipation so that the amplifier can work as much as possible.
Maybe some of your friends will feel inferior to soldering the SMD component, because the components are small and certainly more difficult to solder than DIP components or through holes. So don't worry, you can buy PCBs and all of the SMD components are soldered together, namely by using the SMT Assembly, PCB and SMT Assembly services that I use, namely at JLCPCB, com. also quite affordable, we can save time and energy to solder SMD components.
Hello friends, in this Post I will assemble a class AB AX-BLAME 700 power amplifier, this is the PCB, this PCB layout is designed by my friend Hamas shofwanudin, this cool design uses arc routing angle and there are some that use 45 degrees angle trace. It also uses 2 layers top and bottom copper. This mod version of AX-BLAME can be supplied symmetrically 60 to 90Volt DC symmetrical with component notes according to the label on the PCB. You can buy this PCB by contact whatsapp number (+62)81235641359, PCB is also very high quality because it is printed in JLCPB.
Immediately, for the driver, protection and indicator, I have filled the components according to the labels listed on the PCB,
For the final transistor I use 6 sets of Sanken C3263 and A1294 transistors, attach the final transistor and don't get behind the NPN and PNP. Then I solder the middle leg or collector before I attach the heatsink. It is intended that when installing the bolt to the heatsink the transistor can still be changed to change its position if the bolt hole is not centered or fits the width of the transistor.
After all the transistors are bolted, just solder all the transistor legs, and also give tin to the open PCB path so that the path is stronger.
The Axblame 700 amplifier kit is ready, ready to be tested.
For testing I use SMPS with symmetrical 90VDC voltage, the SMPS that I use is made by Syaelend Tech Indonesia.
Put the power supply voltage for black min, red + and blue ground, and don't forget to plug extra 12V voltage for the protection part. this can use AC or DC voltage 12V,
Then attach the input, this is not accompanied by an input balance so it is recommended to add an input balance or preamp.
I tested this with a 4 Ohm dummy load, along with the measurements I have installed.
This is the initial start of the amplifier, the protective lamp will light up after 2 seconds off and the speaker relay is active. DCO has set 0mV.
Let's just test how much the amplifier outputs. My input signal injects a 300Hz sine voltage,
The output AC voltage before the clip is 57.09V with 14.16A Current so the output power is 808.3W around 800W RMS. Supply voltage drops at 88VDC.
Video test and make:
I continued to use this small voice test 15 ", let's look at the sound. I think this amplifier is very suitable for low mid, the mid sound is thick and loud, even though this amplifier can be used for low or high too.
Hello friends in this post elcircuit will share a very simple tone control layout which was designed by ELECTROINDIA Youtube channel, using only 2 transistors as an amplifier, This tone control has bass, treble and volume settings. and using a 12VDC power supply voltage. following the PCB layout, you can download the complete pdf format below.
Power amplifier Crown xti has the following specifications:
-650 watts per channel at 8 ohms, 1200 watts per channel at 4 ohms, 3200 watts per channel at 4 ohms bridged
-Unmatched performance and technology provides up to 6000watts of power in a 2RU 24lb package
-Integrated Speaker Management System includes crossovers, EQ, delay, limiting, subharmonic synth, and pink noise generator
-USB HiQnet Band ManagerTM interface makes system setup, control, and monitoring quick and easy
-Available JBL factory speaker tunings for JRX, MRX, SRX, and VRX can be easily loaded into each amplifier
Power Amplifier crown xti4000 schematic, you can download full schematic at the end of this post.
Hello friends, on this occasion I will post again, the discrete class-D amplifier UcD Superlite,
Class-D Discrete Amplifier UcD Superlite with RM Core
Is that a discrete class-d UcD?
UCD is one of the Class D Topologies patented by Philips (NXP) and this Class D type is widely used in Hypex products which they claim can compete with Class AB power.
and class-d discrete is a class d power circuit without using IC eg MOSFET IR2110 driver or logic inverting, so it only uses capacitor resistors and transistors, but in this Superlite uses 1 dual OP-AMP IC used for the balanced input for easier reasons sought and many variants rather than discrete op-amps.
UcD Superlite was designed by Indonesian audio experts, Mr. Kartino Surodipo, who is also the admin in the Class-D Next-generation amplifier Indonesia group, he shares a lot of knowledge and design of amplifiers for free or free.
This amplifier, in my opinion, this bass sound is more punch and soft, with a standard MOSFET and PWM freq 250khz, Mid and high sound is also pretty good, it can crisp.
Ripple output or residual PWM can be very low, so it is very safe for Twetter, not easily broken, and here I will design the PCB with a macro component, the following UcD power amplifier scheme which I re-schema in the EasyEDA application.
Complete circuit
- Input balance
- DCP, Speaker protector which functions to disconnect the relay when the speaker output DC voltage is at least 2V
- Led Indicators, there are ON, Signal, Protection Clip, and ready.
- 60VDC-95VDC PSU range.
- For the power output ... we will immediately test it using measurements using Oscilloscope, Ampere Pliers, Avometer, and Dummy load. So it is not difficult to set hundreds or even thousands of watts without measurement.
The PCB Layout that I designed myself, in dual-layer, the dimensions of the PCB are 10x10cm. very compact size and also efficient for the use of power 4 channels, the component looks very tight yes, it is still very safe not to be disturbed for the input signal with PWM oscillation signal, the gap or the distance of the pad is still far compared to me using the SMD component.
for component values do not be negotiable for class D power, because the slight difference will affect the PWM, stability and switching frequency, this is very influential with the sound and power output of class D amplifiers.
For the PWM Cap freq value I use 220pF multilayer capacitors, dual opamp ICs for Inbal using Low Noise MC33078 SMD op-amps can also use DIP version, dead time resistors use 300 + 39ohm 1 / 4W, comparator uses 2n5551 and C3503 manufacturers ON semi, bat54 diodes using SMD, TR Totem using C2655 and A1020 pairs, for dumper diodes using ES2D or can also use Mur240 or ultrafast 2A diodes, MOSFETs using IRFP260N 2 seeds.
Resistor Dead Time Set
C3503 (ON Semi) 2N5551 (Philips)
For Inductor LPF I use several core variants, but for this post, I use MS130 core 3 cm with an inductance value of 33uH. LPF cap 1uF 250V. The relay uses a 12V 20A relay.
Core MS-130060 3.3cm diameter
I use a heatsink aluminum plate with a thickness of 4mm is enough for a class D amplifier. One of the advantages of class D amplifiers compared to other classes is that the efficiency is very high, up to 90% or even more. So the power wasted by heat is so minimal that the heat sink or cooler can be smaller than class AB. Then why is there class D that still uses a fan? yes because there is still power wasted by the heat of about 10%, so suppose this amplifier is branded with 1000W of power then 10% of power is wasted around 100W if discharged by heat, this exceeds 60W solder heat, you can imagine for yourself how hot the 60W solder. So it is better to install a fan, other than that DCO or PWM will be more stable if the temperature of the active component is stable, not hot.
Heatsink 105mmx100mm
The UcD kit is ready and ready to be tested, I use a 90VDC voltage for the main PSU, with the bias I took from the SMPS, note that the SMPS already has a special voltage for bias, the bias voltage must be separate from the main supply or other accessories. Potentiometer uses 10k ohm mono.
For the load test, I installed the output to a 4 ohm 1000W dummy load, and also the measurements that I have installed to measure the output voltage and current, DC output, the temperature of the heatsink amplifier, and also to the watt meter AC input.
700W Power Output at 90VDC Symmetrical PSU, Signal 1kHz
Hello friends in this post, I will assemble the D1K Pro class-d power amplifier and do a sound test and output power, here is a double layer PCB layout designed by my friend Muhammad Syafii, this layout is equipped with DC protection feature, Input Balance which is buffered by the Dual Opamp IC, then there is also Over Current Protection or OCP, and also has an indicator for the front panel.
Gerber file download at end of the post.
Immediately, I will convert this layout to the Gerber file to print the PCB on the JLCPCB site for how to print PCB in JLCPCB, see the following video.
PCB that I ordered at JLCPCB, a very high quality using FR4 fiber material, double side PCB, thickness 1.6mm, dimensions 10x10cm. we just fill the components according to marking or labels on the PCB.
My LPF inductor uses a 3.3cm 77071A7 series core with a number of 2 dual cores, a total of 15 turns, with a 0.6 4 duplicate copper wire. With an inductance value of 32uH.
For the MOSFET, I use 2 IRFP260 N channel MOSFETs.
For the heat sink, I use an aluminum plate, 10x10cm with 2x1.6mm thickness. It is enough for this power amplifier with a note to add a fan.
And the amplifier is ready to be tested, I give the supply voltage at 90VDC and then bias the 12VDC, the speaker output I give a load at 4 Ohms 1000W. 10K volume potentiometer, and input from a laptop that has a balance.
Hello friends, in this post I will share a little about Class-T power amplifiers, this Class-T power amplifier is as reinforcing as Class D power amplifiers that use switching modulation, combined with proprietary techniques by the Tripath manufacturer, where there is the difference in control time and switching frequency depends on the input signal and the amplified signal.
And I will share the Schematic and PCB layout for Stereo Class-T power amplifiers that use the TA2022 chip with the following scheme, you can also download the pdf version at the end of the post.
Stereo Class T Tripath TA2022
In the above scheme, I have completed the start delay to prevent pop when it is first turned on, the timing delay can be adjusted by replacing R33 and C33, the greater the value of both, the longer the time on the amplifier, and vice versa.
I have also added the above circuit to 10V (VN10) also 5V, so you don't need to bother adding an external voltage. If you want to add an external voltage of 10V and 5V you don't need to fill in that part.
For 10V VN10 voltage I use the LM317 regulator which can reduce the power main supply voltage to 10V, -10V is reflected Main -Supply voltage.
I use a 5V voltage R Shunt and Zener regulator circuit, where the main voltage + is inhibited by Resistor R29 and stabilized by Zener 5V1 because R Shunt works to inhibit continuous current, then this R will be a little hotter.
The Shunt R R29 must adjust the main supply voltage, for the 30-35V DC symmetric voltage the value of R29 = 470-680R 3W, and for the 12V-18VDC stand, R29 = 68-150R 3W, voltage 18-30VDC, R29 = 220R-470R 3W.
The main power supply you can use 12VDC -35VDC.
D1, D2, and D3 you can use Schottky diode 1-2A 100V
Your LPF inductor can use T106 core micrometals using a 0.5 double diameter copper cable, which is wrapped around 18-22 turns.
I also share the PCB layout design with the format. RAR (Gerber File) that you can download at the end of the post.
PCB Layout design double layer power amplifier Class-T TA2022.
Video Test
Download Schematic, Part list, and PCB Layout Gerber file.RAR :
Hello guys, on this occasion we share the power amplifier scheme, also called super power amplifier with the D-class fullbridge Ucology topology, where this power amplifier is great for subwoofers with 18 "to 2000W RMS speaker sizes. This power amplifier scheme was designed by Mr. Kartino Surodipo, and indeed dedicated to professional audio use, follows the Fullbridge UcD power amplifier scheme:
To assemble the power amplifier we also shared the PCB Layout.PDF, to make it easier to assemble this fullbridge UcD amplifier kit.
Layout with a single layer design is equipped with a fuse, Speaker Delay, DC Protection,
For the Layout, we provide 2 versions of the SMD version in the form of a Gerber file with a part list (BoM file) to make it easier for you to search for components and references.
Hello this time I will share the PCB layout Stereo Power Amplifier STK41xx-2, and I have tried on the STK4152-2 amplifier chip and the results are quite amazing, the sound produced is very soft and detailed bass sound is good, the vocals and the treble is very clear. Besides using ChipSTK4152-2 you can also use a chip STK4132-2, STK4142-2, STK4162-2, STK4172-2, STK4182-2, STK4192-2. On the PCB that I will share, I also complete it with speaker delay, which serves to eliminate the sound that is quite surprising when the amplifier is first turned on.
You can immediately see the PCB layout as shown below:
You can download a PCB Gerber at the end of this post along with BoM (Bill of Material) to make it easier for you to make this STK power amplifier circuit.
