IR21271STR

Current - Peak Output (Source, Sink):	250mA, 500mA
Base Part Number:	IR21271S
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:	Non-Inverting
Series:	--
Logic Voltage - VIL, VIH:	0.8V, 3V
Voltage - Supply:	9 V ~ 20 V
Gate Type:	IGBT, N-Channel MOSFET
Number of Drivers:	1
Channel Type:	Single
Driven Configuration:	High-Side or Low-Side
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction to IR21271STR

IR21271STR is a cutting-edge gate driver device which is used to drive the high-voltage and medium-voltage insulated-gate bipolar transistors (IGBTs), as well as power MOSFETs in wide range of industrial control appliances. It is built by the world-renowned semiconductor company - International Rectifier (IR). IR21271STR gate driver is categorized as an active-clamp type driver, as its output gate voltage is kept close to the referenced gate voltage. This gate driver is widely used in various fields, such as motor and home appliances, solar power inverters, UPS, DC charging, and building automation controls, to name a few.

Applications of IR21271STR

As mentioned earlier, IR21271STR has several noteworthy applications. For example, this gate driver device is used to drive IGBTs in a variety of motor control applications, such as AC induction motors, brushless DC (BLDC) motors, and other switched reluctance motors, to name a few. Moreover, it is widely utilized in the switch mode power supplies, which are used to rationally control the power flow by switching between two or more controlled power supplies.Apart from the motor control applications, IR21271STR is used to control various power conversion supply systems. It is efficiently used to turn-on and turn-off the IGBTs in the solar power inverters. Also, this intelligent device is used in the home control systems, such as UPS and home appliances including refrigerators, air conditioners and washing machines. Moreover, it is deployed in the various fields of industrial automation, such as x-ray protection, floor heating systems, welding machines and electronic welding systems, as well as gas and industrial flue gas detectors.

IR21271STR Features

This intelligent gate driver device is equipped with several cutting-edge features, such as:

• Advanced level of Electro-Magnetic Interference (EMI) protection
• Good thermal performance
• High-current sink/source capability
• Robust short-circuit protection
• Low operating current (~400mA)
• Low lockout voltage
• Adjustable loop delay
• Fault feedback output
• Protected supply voltage of up to 45V
• Wide operating temperature range (-40°C to +125°C)

IR21271STR Working Principle

IR21271STR is a two channel, high-performance gate driver device equipped with advanced current sensing, spreading, and programmable blanking circuit with adjustable load current sensing thresholds. Its input is connected to the gate drive signal, supplied by the system microcontroller, and the output is connected to the gate of the IGBT or power MOSFET. When a gate drive signal is applied to the input of IR21271STR, it triggers a turn-on action. The latch-on circuit of this gate driver helps to protect the system from any undesired overcurrent conditions. This mechanism helps to ensure that the system is kept within safe conditions. After the outputs are pulsed on, the blanking circuit prevents the current from reaching the latch on threshold until a given blanking window is elapsed. The current over-sensing circuitry of IR21271STR helps to protect the system from the over-current conditions. The output voltage is spread out by its own internal voltage regulator and 7-bit voltage selector. This ensures that the output voltage can be adjusted as per the device under control. Apart from this, this gate driver device is equipped with an EMI filter, snubber input, and output supply pin.

Conclusion

IR21271STR is a highly efficient, active-clamp type gate driver device, built by International Rectifier, which is exclusively used to control the various IGBTs and power MOSFETs. This versatile device is mainly deployed in motor control applications, such as induction motors, and BLDC motors, to name a few. Moreover, it is also used in switched-mode power supplies and x-ray protection systems. Apart from the abovementioned applications, this gate driver is also used in various fields of industrial automation, such as home appliances, UPS, floor heating, and welding machines, among others.

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