IR2118STRPBF

Current - Peak Output (Source, Sink):	250mA, 500mA
Base Part Number:	IR2118SPBF
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):	80ns, 40ns
High Side Voltage - Max (Bootstrap):	600V
Input Type:	Inverting
Series:	--
Logic Voltage - VIL, VIH:	6V, 9.5V
Voltage - Supply:	10 V ~ 20 V
Gate Type:	IGBT, N-Channel MOSFET
Number of Drivers:	1
Channel Type:	Single
Driven Configuration:	High-Side
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The IR2118STRPBF is an integrated power MOSFET driver used for power management applications. It is a part of a family of MOSFET-stretch drivers from International Rectifier and is ideal for a wide range of applications, including automotive, home and industrial applications. This application note provides an overview of the IR2118STRPBF and discusses its application field and working principles.

Application Field and Working Principles

The IR2118STRPBF is a power MOSFET driver that is used in applications that require high switching performance. Its wide output operating range (from 3 to 100V) makes it suitable for a variety of power management applications, including motor drives, HVAC, and industrial automation. The device features an advanced switch-on and switch-off capability, providing fast and accurate control of MOSFETs. Its built-in soft-start capability prevents the inrush current from damaging the power supply, while its short circuit and fault protection ensure safe operation of the system.The IR2118STRPBF uses a high and low side MOSFET driver with a switchable charge pump for Gate-source and source of source-drain energies. The high-side and low-side MOSFET driver output is controlled by separate high-side and low-side PWM voltage inputs, allowing for precise control and independent operation. The device also features an open collector hardware-fault flag (HFF) output and optional push-pull outputs for status indication.The working principle of the IR2118STRPBF can be summarized as follows: The desired gate drive is applied to the high and low side MOSFETs by the applied PWM voltage inputs, while the two charge pumps on the device is used to provide the gate and source of source-drain energies. The degree of conduction of the MOSFETs is determined and properly controlled by the applied PWM voltage inputs. Additionally, the hardware-fault flag (HFF) output allows for the monitoring of the MOSFET voltage and/or loading conditions.

Conclusion

The IR2118STRPBF is a highly efficient and reliable power MOSFET driver ideal for applications that require high switching performance. Its wide output range, short circuit and fault protection, and hardware-fault flag output makes it suitable for use in a variety of applications, including motor drives, HVAC, and industrial automation. Furthermore, its built-in soft-start capability ensures safe operation by limiting the inrush current, while its two charge pumps provide the gate and source of source-drain energies needed for proper conduction.

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