MIC4423BN

Logic Voltage - VIL, VIH:	0.8V, 2.4V
Base Part Number:	MIC4423
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 150°C (TJ)
Rise / Fall Time (Typ):	28ns, 32ns
Input Type:	Inverting
Current - Peak Output (Source, Sink):	3A, 3A
Series:	--
Voltage - Supply:	4.5 V ~ 18 V
Gate Type:	N-Channel, P-Channel MOSFET
Number of Drivers:	2
Channel Type:	Independent
Driven Configuration:	Low-Side
Part Status:	Obsolete
Packaging:	Tube

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MIC4423BN Application Field and Working Principle

PMIC (Power Management Integrated Circuit) - Gate Drivers are a special type of integrated circuits used to control and manage the flow of power. The primary function of a power management IC is to ensure that the switch-mode power management devices operate efficiently and accurately. In this vein, the MIC4423BN is a PMIC driver designed to control the power supply circuit of switch-mode power conversion systems.

Overview of the MIC4423BN

This PMIC - Gate Driver can be used with a wide range of power-management applications such as DC-DC converters, high-side/low-side switches, brushed and brushless DC motor controls, voltage regulators and other power management systems. It offers a wide range of features such as thermal shutdown, overcurrent protection, adjustable slope compensation, and high-side/low-side current sensing. Additionally, the IC features high-and-low-side gate drivers with maximum gate-drive currents up to 3A, allowing for high-speed switching operations.

Working Principle of the MIC4423BN

The MIC4423BN is a PMIC driver, meaning it uses an integrated circuit to control the power supply circuit of switch-mode power conversion systems. The device operates by monitoring and controlling the flow of current within the power converter by actively switching on and off the power switches. In order to control the flow of current, the IC uses a high- and low-side gate driver to open and close the gate (power switch) at the desired time.The IC\'s primary output is the GATE (gate driver) pin, which is used to control the power switch. When the GATE pin is driven to a logic high voltage level, the power switch is turned “on” and vice versa. The IC also has open-drain status pins which are used to show the fault conditions of the power switch and the output voltage.Additionally, the MIC4423BN features an adjustable threshold voltage, which can be used to obtain better control over the switching frequency. The device also features adjustable slope compensation and enable input which helps prevent noise from propagating from the output to the input of the conversion system.Finally, the IC includes thermal shutdown and overcurrent protection circuits that protect the power switches from short-circuit or overcurrent events.

Conclusion

The MIC4423BN is a versatile PMIC - Gate Driver designed to control the power supply circuit of switch-mode power conversion systems. Its wide range of features and adjustable parameters make it useful for a variety of applications, such as dc/dc converters, switches, and motor controllers. The device features a high-and-low-side gate driver with maximum gate-drive currents up to 3A, adjustable threshold voltage, adjustable slope compensation, open-drain status pins and overcurrent protection.

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