SI8261ACD-C-IM

Current - Output High, Low:	400mA, 600mA
Approvals:	CQC, CSA, UR, VDE
Supplier Device Package:	8-LGA (10x12.5)
Package / Case:	8-VELGA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply:	13.5 V ~ 30 V
Current - DC Forward (If) (Max):	30mA
Voltage - Forward (Vf) (Typ):	2.8V (Max)
Current - Peak Output:	600mA
Series:	Automotive, AEC-Q100
Rise / Fall Time (Typ):	5.5ns, 8.5ns
Pulse Width Distortion (Max):	28ns
Propagation Delay tpLH / tpHL (Max):	60ns, 50ns
Common Mode Transient Immunity (Min):	35kV/µs
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Technology:	Capacitive Coupling
Part Status:	Obsolete
Packaging:	Tray

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Introduction

The SI8261ACD-C-IM is an isolator gate driver used in many industrial applications, such as power management, automotive, aerospace, and other applications requiring isolation. In this article, we will discuss the SI8261ACD-C-IM application field and working principle.

SI8261ACD-C-IM Application Field

The SI8261ACD-C-IM isolator gate driver is used to serve as an interface between a microprocessor and power semiconductor devices such as IGBTs and MOSFETs. It enables a seamless and reliable integration of the microprocessor and the control of the power components. This device is used in a wide array of industrial and commercial applications due to its high efficiency and ability to isolate pulses and disturbed signals. This enables it to protect the microprocessors from voltage evidence as well as instantaneous overvoltage. The SI8261ACD-C-IM has a switching frequency of up to 125kHz and is capable of delivering ±2A STV and ±4A PIV. It is designed to operate on any voltage source between 6V and 36V, making it extremely flexible.

SI8261ACD-C-IM Working Principle

The SI8261ACD-C-IM works in three main stages. First is the input signal detection stage. This isolator gate driver integrates a switch-mode efficient power supply which allows it to detect the input signal and modulate it with regard to the detected voltage sources or other influencing factors. This allows the device to be extremely efficient due to the decrease in power loss. The second stage is the output pulse stage. This is where the detected input signal from the previous stage is further modulated according to the desired characteristics. This modulated signal is then sent to the output and is used to drive the power components such as IGBTs and MOSFETs. Finally, the isolated signal from the input is fed back to the power semiconductor devices, and the complete cycle is repeated.

Conclusion

The SI8261ACD-C-IM isolator gate driver is used in a wide variety of industrial and commercial applications primarily due to its high efficiency and ability to deliver and isolate both low- and high-speed switching signals. Its working principle involves the detection of the input to modulate it, the further modulation of the detected signal, and the isolated output of the same signal for completion. This makes the SI8621ACD-C-IM gate driver a reliable and efficient choice for many industrial applications.

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