IRS21844SPBF

Current - Peak Output (Source, Sink):	1.9A, 2.3A
Base Part Number:	IRS21844SPBF
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Rise / Fall Time (Typ):	40ns, 20ns
High Side Voltage - Max (Bootstrap):	600V
Input Type:	Non-Inverting
Series:	--
Logic Voltage - VIL, VIH:	0.8V, 2.5V
Voltage - Supply:	10 V ~ 20 V
Gate Type:	IGBT, N-Channel MOSFET
Number of Drivers:	2
Channel Type:	Synchronous
Driven Configuration:	Half-Bridge
Part Status:	Active
Packaging:	Tube

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PMIC - Gate Drivers

The IRS21844SPBF is a non-inverting spiking-suppression IGBT gate driver, which is part of a family of low-voltage gate drivers developed by Infineon Technologies. Its primary application is to protect IGBTs and MOSFETs from high frequency transients due to rapid voltage changes occurring on their gates.The IRS21844SPBF has a single differential input, two high-current push/pull outputs and can be used in any polarity configuration. It is used in motor control and power electronics applications to control switching of IGBTs or MOSFETs.Physically, the device is a narrow SO-8 package with eight pins. These pins are labeled VCC, GND, INH, IN, OUT+, OUT-, PFL, LFL and VC1.

Working Principle

The IRS21844SPBF works with a differential input. By apply a positive voltage to the positive input and a negative voltage to the negative input, the driver will switch the output from low to high. When the input signals are removed, the driver will switch the output back to the low state.The input signal is amplified by a transistor and the output is then controlled by two gates. These two gates act as current limiters and spike suppressors; they allow the output voltage to rise to a certain level before stopping it and switching the output back to the low state. The two gates are also linked to a slew rate limiter, which limits the rate at which the output voltage can switch between high and low states.The chip also has an in-rush protection feature built in, which delays the output voltage from switching for a certain period of time when the input signal is switched (thereby avoiding in-rush related problems).The PFL and LFL pins are used to control the output voltage slew rate (i.e. the time taken for the output voltage to rise from zero to its maximum level). These pins are used to control the switching speed of the device, with faster switching speeds giving better performance.The VC1 pin can be used to configure the in-rush protection feature. By applying a voltage to this pin, the protection feature can be disabled or enabled, or the time of the delay can be set.

Application

The IRS21844SPBF can be used in a wide range of applications, including motor control, power electronics and safety applications. In motor control applications, it can be used to control the switching of IGBTs and MOSFETs in electric/hybrid vehicles and inverter/converter applications.In power electronics, the device can be used to control the switching of IGBTs and MOSFETs in power supplies and lighting controls. In safety applications, it can be used to detect and protect against transient overvoltage and overcurrent, helping to ensure the safety of the system.The device can be used in a wide range of operating environments and does not require any additional components for operation. It has a wide operating temperature range, from -40°C to 125°C and is RoHS compliant. In summary, the Infineon Technologies IRS21844SPBF is a versatile, low-voltage, non-inverting gate driver designed for use in a wide range of applications. It has a single differential input and two high-current outputs and provides protection against overvoltage and overcurrent transients. With its wide operating temperature range and RoHS compliance, it is suitable for use in a variety of systems.

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