Workhorse 1500W Bipolar Class H
| Name | Workhorse 1.5KW Bipolar Class H Amp |
| Type | Solid State |
| Application | PA |
| Class | H |
| Approx Cost | Unknown |
| Designer | Workhorse |
| Thread | http://www.diyaudio.com/forums/solid...r-class-h.html |
The Project
Do it yourself, Class-H power amplifier 1500WRMS @ 2ohms
Introduction
Its a Class-H amplifier with following features:
1: Fully complementary symmetry input differential with Cascode loading.
2: CE-CB Cascode VAS for wider bandwidth.
3: 2 Step rail switching with controlled slew for minimizing switching noise.
4: Triple EF output stage for high damping factor and ease in 2 ohms load driving.
5: All set of required basic professional protection circuitry.
6: Almost Half the heat dissipation of same wattage class-ab amplifier due to Rail Tier Switching and excellent handling of reactive loads.
1: Fully complementary symmetry input differential with Cascode loading.
2: CE-CB Cascode VAS for wider bandwidth.
3: 2 Step rail switching with controlled slew for minimizing switching noise.
4: Triple EF output stage for high damping factor and ease in 2 ohms load driving.
5: All set of required basic professional protection circuitry.
6: Almost Half the heat dissipation of same wattage class-ab amplifier due to Rail Tier Switching and excellent handling of reactive loads.
Goals
Goal: To design a reliable amplifier with professional standards.
Result: All design goals met.
Result: All design goals met.
Specifications
| Name | Description |
| Voltage Gain | 26dB |
| Full power Bandwidth | 20-20kHz |
| Power output | 1500WRMS @ 2ohms |
| Input Sensitivity | 4Vrms @ 8Ohms |
| S/N Ratio | 100dB |
| Peak Consumption | 4400VA @dual channel @ 2ohms continuous music operation |
| Idle Consumption | 110W |
| Harmonic Distortion | 0.05% THD [FPRL] |
| Load Impedance | 2 ohms minimum |
| Slew Rate | 33v/uS |
| Stability | Unconditionally stable with all known real world speaker loads |
| Output configurations | Parallel/Stereo/Bridge operation |
| Damping Factor | >1000 @ 100hz |
Additional Features
- Thermal shutdown
- DC Fault
- Muting
- Short Circuit Protection
- True Clip Detection
- Signal out
- Fault Status
Schematic/Blueprint
Bill of Materials
There is no BOM just yet. Will be added later.
Simulations and Analysis
<Embed the images for your simulations here along with descriptions for each of them so people know what you're talking about.>
Construction (Steps / Tips / Notes)
Project Files
The files for this project are available in the attachments section at the bottom of the page.
Other Notes
- Requires 2800VA transformer with following winding specs: 85-50-15-0-15-50-85 14A secondary.
- PCBs should be printed with minimum 35micron and PTH is must as there are vias on the board
- PCB measures 37 X 12 cm (4.75 x 14.5 in)
- Bias Pots: 10mV across emitter resistors of output devices corresponds to 30mA through each device, should be optimum
Known Substitutions
- You can use Genuine 5200/1943 upto 1.5KW or MJL21196/95 for 2KW
