9/3/2019 Sg3525 Ir2110 Smps Rar Programs
Offline Half-bridge converter Input: 160 to 240V AC 50/60Hz Output: 14.5v 10A (max) Final test circuit (on PCB) for battery charging. To be incorporated in SMPS inverter with charger. The primary side PWM is controlled by SG3525 PWM chip. Frequency of operation is around 50kHz.
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The output signals of the SG3525 are fed into a IR2110 high-low side driver which drives the 2 MOSFETs (IRF840) configured for half-bridge topology. ETD39 core is used for the transformer. It was wound by hand at home by me. A primary side snubber is used. 2 bulk capacitors (470uF, 200V each) are used for the half-bridge converter.
An auxiliary 50Hz transformer (18V 100mA) is used to provide auxiliary low voltage output, which is rectified, filtered and regulated to 12V with a 7812 to power the SG3525, IR2110 and related circuitry. Since average current is low, voltage difference between 7812 input and output is not too great, the power dissipated by the 7812 is not too high and no heat sink is required. The output of the ETD39-based transformer is rectified with schottky rectifier STPS3045 and an LC filter is used to filter to pure DC. The output voltage is kept regulated using a zener-optocoupler based voltage feedback loop. The STPS3045 is mounted on a heatsink. The output inductor is the large toroidal inductor beside the 50Hz transformer. It has not been mounted on the PCB.
NTC has been used at the input side to limit inrush current due to charging of the LARGE BULK capacitors at the primary side. A fuse has been used for protection in case of short-circuit. A 200-ohm resistance is used at the output as 'dummy load'. I have designed the PCB myself and have wound the transformer myself, at home. 1A offline flyback power supply with UC3842 Input: 160 to 240V AC 50/60Hz Output: 14.5v 1A (max) Could be used as auxiliary power supply. The primary side PWM is controlled by UC3842 chip. The UC3842 drives the high voltage MOSFET (IRF840) directly as it has a built-in MOSFET driver.
Ir2110 Mosfet Driver
50k resistor is used for startup from the high voltage DC bus - the UC3842 has built-in zener diode that limits voltage, provided current is low enough. EE25 core was used for the transformer. I wound the transformer myself. The output of the transformer is rectified with ultrafast rectifier 31DF6 and capacitor is used to filter to pure DC. The output voltage is kept regulated using a zener-optocoupler based voltage feedback loop. NTC has been used at the input side to limit inrush current due to charging of the capacitor at the primary side. A fuse has been used for protection in case of short-circuit.
This is one of the oldest SMPS circuits I had made. I made it sometime in 2008.
2A flyback power supply with TOP-GX Input: 160 to 240V AC 50/60Hz Output: 14.5v 2A (max) The power supply is based on the dedicated offline-switcher 'TOPSwitch-GX' TOP245Y, which contains both the primary PWM controller and the high-voltage MOSFET. EE25 core was used for the transformer.
I wound the transformer myself. The output of the transformer is rectified with ultrafast rectifier MUR420 and LC filter is used to filter to pure DC. The output voltage is kept regulated using a TL431-optocoupler based voltage feedback loop. NTC has been used at the input side to limit inrush current due to charging of the capacitor at the primary side.
A fuse has been used for protection in case of short-circuit. This is one of the oldest SMPS circuits I had made. I made it sometime in 2008.
Ir2110 Application
12VDC to 280VDC DC-DC converter for CFL inverter Input: 11VDC to 14VDC Output: 280VDC 60W Was designed to drive four 15W CFL's from 12V battery. The primary side PWM is controlled by SG3525 PWM chip. Frequency of operation is around 70kHz. The SG3525 drives the 2 MOSFETs (IRF3205) configured for push-pull topology.
EI33 core is used for the transformer. It was wound by hand at home by me.
The 2 MOSFETs are mounted on heatsinks. The output of the transformer is rectified to DC with 4 ultrafast diodes (UF4007) configured as a bridge rectifier.
LC filter is used to convert output to pure DC. 12VDC to 220VAC Inverter (200 to 300W) using SG3525, IR2113 and PIC16F676 with features such as low-battery and overload protection The primary side PWM is controlled by SG3525 PWM chip. It drives 2 MOSFETs (IRF3205) in push-pull configuration.
The MOSFETs drive the transformer. ETD34 core was used for the transformer. The output of the transformer is converted to DC. The high-voltage DC is kept regulated by the SG3525 using direct resistive voltage-divider based feedback. This high-voltage DC is then converted to 50Hz AC using 4 MOSFETs (IRF840) in full-bridge configuration. The quasi-sine signal is generated by the 16F676. The output signals are fed into 2 IR2113 high-low side drivers that drive the MOSFET full-bridge.
The 16F676 also monitors the battery voltage for low-voltage cut-out. It also monitors the load current for overload protection. I made this circuit sometime in 2016 after lots of failure in design and implementation.
Description of ADC The ADC are analog to digital converters have a variety of applications as an intermediate device that converts analog signals to digital form. These signals are used to be digitized for processing digital processors. For example we found a wide variety of sensors that convert the physical characteristics of the sensor into analog signals such as heart rate, temperature, pressure, force, distance, etc. The ADC0804 The ADC0804 is a converter from analog to digital 8 bits.
This ADC0804 has only one analog input channel with a digital output eight bits that can mostra 256 values of different measures. The step size is adjusted by setting the reference voltage in pin9 the reference input voltage can be adjusted to allow encoding any smaller range for the entire 8-bit resolution analog voltage. When the voltage reference pin is not connected to the ADC0804, the reference voltage defaults to the operating voltage, ie, Vcc. The step size is 19.53mV 5V (5V / 255), ie, for e. Description counter 0-9 This counter 0-9 in easy to assemble, basic to use for other more complex where we make use of integrated circuits didactically as these could be replaced by other more complex circuits with simple application of microcontrollers. Counter operation 0-9. This counter circuit is formed by a essentially comprises a wave which functions as a circuit operating this type is characterized by an output square waveform with width defined by the designer.The outgoing wave frequency can be controlled by the resistor is connected between pins 7-8 and 2-7 in addition to the electrolytic capacitor connected to pin 2 of land.
The pulse output can be varied by 100K ohm potentiometer (RV1). Circuit counter.
Si eu recomand tot LTspice, program gratuit, bun, versatil, usor de invatat. Eu am simulat mai multe tipuri de convertoare complete cu SG3525 si IR2110 si procedeul este pentru useri care au cunostinte avansate in tehnica convertoarelor si a procedurilor de simulare. Incercati sa postati o schema bloc, sau de principiu, cu date tehnice de intrare si iesire: - tensiune de alimentare - o tensiune fixa, sau mai multe tensiuni fixe sau tensiune variabila, curent, putere de iesire - stabilizare sau nu - ce doriti sa alimentati cu ea sau este doar o idee sau un proiect - cu ce componente doriti sa lucrati, tranzistori, diode, miezuri,etc Nu doresc sa va descurajez, dar vreo 200 de ore de studiu si simulari mai simple sunt necesare, pornind de la simplu la complex si in final la un produs optimizat. Pentru inceput un circuit de studiu simplu este in atasament.
La decomprimare exista si un fisier text cu indicatii. Indicatiile din zip arata calea directoarelor si a fisierului sg3525a.asy si Mylib.lib Se copiaza directorul 'Mylib' in directorul 'sym' asa cum se arata mai jos C: Program Files LTC LTspiceIV lib sym Mylib Dupa copiere continutul este urmatorul C: Program Files LTC LTspiceIV lib sym Mylib Mylib.lib C: Program Files LTC LTspiceIV lib sym Mylib sg3525a.asy Daca va functioneaza, se poate trece la etapa SG3525a-MOSFET-Transformator-Redresor. @gsabac Edited by gsabac, 15 September 2017 - 09:55 AM.
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