2023年8月6日 · I am building a half-bridge with IR2101 as half bridge driver and I am being confused by something in the datasheet of IR2101. My main supply voltage will be 40V. The VCC of the IR2101 will be 15V stepped down from the same supply. Below is the circuit I am making. According to my circuit VB is going to 14.5V.

2018年11月28日 · If you read the datasheet for the IR2101 then you can see that the bootstrap capacitor only increases Vb when there is a transition on the output of the external high side FET. So the high side boostrap uses positive feedback to increase the Gate drive voltage and can only work if there is a path to ground to allows the bootstrap capacitor to ...

2021年7月31日 · I am trying to make BLDC driver with IR2101. MOSFETs I am using are IRFB4110PBF. So for testing I am currently using one pair. I am using oscilloscope to see the output waveform. What I see is that it always remain high as soon as I attach power. Turns out voltage at HO stays high and at LO stays low, doesn't matter if I attach input pins or not.

2020年6月19日 · In this case, driving the Up Mosfet is a challenging job because the voltage of Mosfet's Source is floating. So, the solution used in IR21xx ICs is this: when the lower Masfet is on, the cap (between Vb & Vs) is charged up to (Vcc - 0.7v) where Vcc is the supply of IR2101 and 0.7v is the voltage drop of diode.

2022年12月29日 · I found a 500W inverter implementation with an Arduino Nano and IR2101. According to its schematic, I think the input connections of both IR2101 are wrong. If it is wrong, then why is this circuit is working fine in the video? Did I get it wrong? Video: 500W Sine Wave Inverter Using Arduino - H Bridge

2018年1月14日 · The ir2101 is more flexibility with each driver controlled separately. To use the ir2101 as one side of a full bridge or as a half bridge driver you would need to have separate input signals and provide the required dead time.

2020年10月20日 · If Vcc of IR2101 is 12v, the cap is charged up to 11.3v (0.7v drop because of diode). Then the low-side mosfet is turned on and it's time to drive the high-side mosfet. In this case, we have a floating voltage supply of 11.3v stored in the cap which will serve the driver circuitry inside IR2101.

2015年2月16日 · I designed a simple half bridge circuit using popular FET driver IR2101 (switching freq. around 500 Hz, drain current about 250 mA, supply voltage about 12 V): Of course I have resistive load connected between the VS node and ground, forgot to draw it. This is a part of a bigger schematic, but the bridge circuit doesn't work as I expected.

2023年8月14日 · I’m trying to make a controller with 3 H bridges (N-FET, IR2101 and a Arduino Mega). I’m sure that the problem is in my code but I don’t know how to fix it. I think that the problem is in the PWM.The pwm is the same in all phases. AH, BH and CH have the same wave at the same time. This is my code:

2017年4月14日 · I've made a driver circuit using IR2101 driver and a fairly large IRF3710 mosfet. The circuit works up to a certain current through the mosfet but then the driver mysteriously fails and pulls both mosfets high generating a short circuit on the output. I'm using 3x of these circuits to drive a BLDC motor with 0.5Ohm winding resistance.