IR2104S Application Note | Circuit & MOSFET Driver

IR2104 Pinout Equivalent

IR2104 Is produced by Infineon a half bridge drive chip, usually used to drive MOSFET or IGBT, because the device ± 200 mA, peak drive current and built-in zone timer (520ns) can effectively prevent bridge arm through, so is applied to motor control, power conversion, the chip needs to work with bootstrap capacitor to achieve high side power supply.There are many factors to consider when designing circuits that need to replace this chip, and in the next part of this article I will introduce the pinout of the IR2104 and recommend some alternative chips.

Here is the detailed pin definition and functional description of the IR2104

Alternative model recommendation

Designers need to be aware of the differences in voltage/current parameters on the circuit when replacing them.The following alternative chips have similar functionality and better performance than the IR2104, but the pinout may be different, requiring the designer to pay more attention and change the layout when creating the PCB.Below I have also labelled their package：

Picture	Manufacturer	Model Number	Key Features	Package
	Microchip	MCP1407	Drive current ± 1.5A, high-speed switch (<30ns)	SOIC-8
	STMicroelectronics	L6384E	Integrated bootstrap diode and voltage regulator, simplified design.	MSOP-8

When replacing IR2104, attention should be paid to ensure that the bootstrap capacitor and diode parameters match and pay attention to the adjustment of the dead time. Some devices do not have the built-in dead time, and designers need to connect external logic circuits to avoid straight through.