MAX4420MJA/883B

Series:	Military, MIL-STD-883
Packaging:	Tube
Part Status:	Active
Driven Configuration:	Low-Side
Channel Type:	Single
Number of Drivers:	1
Gate Type:	N-Channel, P-Channel MOSFET
Voltage - Supply:	4.5 V ~ 18 V
Logic Voltage - VIL, VIH:	0.8V, 2.4V
Current - Peak Output (Source, Sink):	6A, 6A
Input Type:	Non-Inverting
Rise / Fall Time (Typ):	25ns, 25ns
Operating Temperature:	-55°C ~ 125°C (TA)
Mounting Type:	Through Hole
Package / Case:	8-CDIP (0.300", 7.62mm)
Supplier Device Package:	8-CDIP

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MAX4420MJA/883B is an integrated gate driver with peak current of 1.1 A. Its application is mainly for power MOSFET and IGBT applications in high-speed switching circuits. In the past, the gate driver is required to have sufficient output current or slew rate to drive the power MOSFET or IGBT. This requirement is mainly due to the problem of “Miller Effect”. When the switching frequency is around 100MHz and the parasitic inductance of the MOSFET is relatively small, the effect of the Miller Effect can be ignored. However, when the frequency of the switching signal is higher, the parasitic capacitance of the MOSFET increases, and the Miller Effect will increase sharply. The Miller Effect will reduce the rise and fall edge rates of the signal and the peak current of the gate driver not enough to drive the power MOSFET or IGBT. Moreover, the Miller Effect will increase the drain to source capacitance and drain to source saturation voltage as the voltage of the gate terminal increases. This will cause the MOSFET to react slowly, so a higher current and speed of the driver is needed to drive the power MOSFET or IGBT. The MAX4420MJA/883B is designed to solve the above problems of driving power MOSFET and IGBT applications in high-speed switching circuits. It uses a charge pump architecture to self-drive MOSFET and IGBT gates at a peak current of 1.1 A and a minimum turn-on and turn-off of 30ns. The MAX4420MJA/883B provides an adjustable supply voltage range with a minimum of 3.2V, a maximum of 10V, and a range of 1.0V to 5.0V as the operating voltage. This range of voltage allows the current of the gate to be adjusted according to different requirements. Additionally, the internal synchronous rectifier of the MAX4420MJA/883B can be used to reduce the total power consumption of the driver. The MAX4420MJA/883B provides two control pins (Ena and O.S.P.). The Ena is used to gate the main current source, and the O.S.P. is used to reset the device. The source current of the main current source can be adjusted by changing the voltage on the O.S.P. pin. The MAX4420MJA/883B also provides a high-speed output circuit designed to reduce the Miller Effect. It has an adjustable slew rate depending on the input voltage. When the voltage at the Enable pin is low, the output circuit will automatically turn off to reduce the power dissipation. To reset the device, the O.S.P. pin can be pulled low to ensure a full reset of the device. In short, the MAX4420MJA/883B is a PMIC-gate driver suitable for driving power MOSFET and IGBT applications in high-speed switching circuits. It has an adjustable supply voltage, adjustable current source, and an adjustable rising and falling edge rate. The internal synchronous rectifier can significantly reduce the power dissipation of the device. Finally, the device has a protective auto-off feature to reduce power dissipation and ensure safety.

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