Jan 20, 2013 Using the high-low side driver IR2110 - explanation and plenty of example circuits. Can i use single ir2110 and single sg3525 to drive h-bridge ' 4 mosfet' and i want full circuit diagram of drive circuit of h-bridge. Reply Delete. I have struggled with buck configuration of IR2110 Mosfet driver. I want to be able to. I am using IR2110 driver circuit to drive the 100 kHz H-bridge IRF640 MOSFET switches. But as the input voltage to the H-bridge increases (about 25 V) the.
Good day everyone! I have built the circuit attached herein on a PCB. The driver section and the half-bridge circuit were tested individually and worked fine.
But when I try to combine them the IR2110 always blows up. And the output of the 12v supply that I used to power the vcc pin of the IR2110 gets messed up as well. I used 80v ac coming from a variac. How do I fix this problem? Note: the SD pin 11 of the IR2110 is tied to ground during the testing and the frequency coming from the VCO is 80khz.
The circuit is from this website with a demo of a working unit. I really need your help with this one. Hi, From the schematic it may work, every simulator may say it works.But there is a lot 'undefined'. Maybe with 10cm of wiring length it works, maybe with 12cm not.
Maybe with wires in close priximity it works, mabye with random wiring it does not. Maybe with GND star wiring it works, maybe with random GND wiring it does not. Maybe with the one power supply it works, maybe with another power supply it does not. Maybe today it works, maybe tomorrow it does not. It's a fragile system. It's like building a stack of random stones.
One person may be able to stack 8 stones on each other, while another person has problems with 3 stones. But common to all stacks is that they will fall apart easily. Hi, the most critical signals are high current with fast rise/fall rate. In this case the gate driver signals may carry some 100mA maybe just within the first 100ns. Thus the traces from driver IC to gate.
And for sure the return paths: mosfetsource back to the driver IC. If they are not low impedance. At first you will see drity signals with ringing, then with incresing impedance heavier ringing, maybe with voltages beyond specifications, increased heating increased EMI, up to complete failure.
The logic level signals don´t carry much current. Thus they are less critical. Additionally the driver IC has some schmitt trigger inputs. The hysteresis helps to ensure proper function. But GND is the reference of the signal. Thus you still have to take care about GND wiring.
Hi, The logic level signals don´t carry much current. Thus they are less critical. Additionally the driver IC has some schmitt trigger inputs. The hysteresis helps to ensure proper function. But GND is the reference of the signal.
Thus you still have to take care about GND wiring. Klaus About the GND connection. Looking at the IR2110 datasheet, the Logic side has a different supply and GND than the Driver side. To my understanding, those GNDs should not be the same is that correct?
Kindly suggest a proper way of the grounding connection? Hi, Did you go through te documents provided by the manufacturer? I recommend to read through them. You don´t need to read and understand every single word.
But you should get an overview. Very useful are: 'application notes' and the 'user manual'. You talk about VSS and COM. VSS is the logic side reference.
COM is the low side driver reference. In the 'Absolute maximum ratings' you see the limits you must not cross. Not for a microsecond. Not at power up or power down.
Else you risk damage of the device. In the 'Recommendend Operating Conditions' you see that VSS is limited to +/-5V wrt.
Within these limits you are safe, even for a long time. On the other hand theses limits tell you that VSS must not float wrt.
You have to ensure this. I recommend to connect the VSS signal and the COM signal but with intelligent wiring. COM needs a short and wide connection directly to the low side MOSEFTSource. MOSFET source is the reference point to drive the MOSFET´s gate. And this is the job of the driver IC.
Mosfet Source should have a GND plane for the bulk capacitor and the fast capacitor to the high sidedrain. I´d choose the bulkcapacitorGND connection as GND star point. (also connect the power supplyGND here. And all other circuit that refers to the same GND) You may use an extra trace from bulkcapacitorGND to the logic section gndplane. But take care that no pulsed current should be carried by this wire.
It´s all not that easy to explain, because every other connection may have an influence. Avoid GNDloops. Hi, The power bus voltage needs to be bypassed. You need one big bulk capcacitor, usually an electrolytics.
It needs to store some energy. Then you need a fast capacitor, usually a ceramic ot foil one, this is to take care of the fast edges caused by the switching. To stabilize the voltage, to reduce EMI. Both capacitors are in parallel, the lower end to GND plane, the upper to the power bus voltage. The fast capacitor needs to placed very close to the drain of the high side Mosfet. This also reducecs high voltage peaks that may harm the Mosfets. Ground plane should be clear, hopefully.
Just a rock solid plane to get a stable reference. According to the post #1 schematic, the current measurement is low bandwidth only. Thus I wonder, if the 680 nF capacitors shouldn't be connect directly across the half bridge, eliminating unwanted DC bus inductance. I also feel that the gate drive is too hard and should use series gate resistors, probably the well known resistor diode circuit for fast off, slower on. Presently parasitic oscillation might have killed the FETs. It's always suggested to start power stage operation with a current limited supply and incrementally rising voltage, giving a chance to detect parasitic oscillations before they destroy the circuit.
See our non-profit green energy site here: This is the location for the schematic: This high side driver will be used to turn on/off a large Mosfet that is a part of a high voltage pulse generator circuit also located at the above Photobucket location of ours. Allied Electronics' web site: The Mosfet mounting kit Allied Electronics # 70115188 Socket, DIP; 14 Pos Allied Electronics # 70206182 International Rectifier High and Low Side Driver, IR2110 Allied Electronics # 70017135 MOSFET, Power; N-Ch; VDSS 400V; IRF730 Allied Stock#: 70079037 HEATSINK FOR TO-220 Allied Stock#: 70024608 Vktech 5pcs 6x8cm Double-Side Prototype PCB Universal Printed Circuit Board Connector Terminal Blocks Receptacle 2 Position: AN978 application note: IR2110 datasheet: IRF730 datasheet: Here is the data sheet for PCB connectors: Allied stock # 70086281.