IRS21091STRPBF

Current - Peak Output (Source, Sink):	290mA, 600mA
Base Part Number:	IRS21091SPBF
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Rise / Fall Time (Typ):	100ns, 35ns
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:	Tape & Reel (TR)

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Introduction

IRS21091STRPBF is a monolithic gate driver integrated circuit (IC) developed by Infineon Technologies, a leading manufacturer of power management integrated circuits (PMICs). It is dedicated to driving two-level power MOSFETs or IGBTs in half-bridge or three-level topologies. The IRS21091STRPBF includes two high-side drivers for paralleled configurations and two low-side drivers for controlling the DC/DC power stages. Its integrated soft start and fault protection features reduce system complexity and enhance application robustness. Compared with discrete solutions, the IRS21091STRPBF offers significantly reduced power losses and has been designed for a wide range of industrial automotive and consumer applications.

Application Field

The IRS21091STRPBF can be used in a wide variety of different application fields. In automotive applications, the device is suitable for engine control units (ECUs), fan-speed control, DC/DC converters and lighting applications. The IRS21091STRPBF can also be used in consumer and industrial applications. These include DC/DC converters such as AC/DC, DC/DC and DC/AC converters, DC motor control circuits, lighting applications and solar inverters.

Features

The IRS21091STRPBF provides embedded features to protect the application from possible external faults. The device features a shutdown function for the high-side and low-side drivers to protect against output open circuit and external overvoltage faults. It also features an integrated soft start for both the high-side and low-side drivers to reduce switching losses in the output transistors and to reduce in-rush current. The integrated fault protection in the IRS21091STRPBF eliminates the need for external components, reducing system complexity and cost.

Working Principle

The IRS21091STRPBF operates in two modes: active- and idle-mode. In active-mode, the device is configured to drive the MOSFET and IGBTs, while in idle-mode, the device is in an inactive state and the MOSFETs and IGBTs are turned off.In active-mode, the device has two inputs: positive (VIN) and negative (GND). When the supply voltage VIN is higher than the VIN threshold voltage (VTH), then the device starts to drive the MOSFETs and IGBTs. The high-side driver will be enabled first, followed by the low-side driver. Once enabled, the high-side driver will activate the MOSFET, while the low-side driver will activate the IGBT. The MOSFET and the IGBT are then synchronized in the time sequence, enabling the output voltage to be controlled.In idle-mode, the device will be disabled and the MOSFETS and IGBTs will be off. This also allows for fast switching and soft-starts for reducing inrush current.

Conclusion

The IRS21091STRPBF is a dedicated gate driver IC developed by Infineon Technologies. It is suitable for driving two-level power MOSFETs and IGBTs in half-bridge or three-level topologies. The device includes two high-side drivers for paralleled configurations and two low-side drivers for controlling the DC/DC power stages. It provides embedded features to protect against output open circuit and external overvoltage faults, and also includes an integrated soft start for both the high-side and low-side drivers to reduce switching losses in the output transistors and to reduce in-rush current. The device can be used in a variety of different application fields, such as engine control units (ECUs), fan-speed control, DC/DC converters and lighting applications, as well as consumer and industrial applications.

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