Allicdata Part #: | MIC4422ABN-ND |
Manufacturer Part#: |
MIC4422ABN |
Price: | $ 0.00 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Microchip Technology |
Short Description: | IC DRIVER MOSFET 9A LS 8-DIP |
More Detail: | Low-Side Gate Driver IC Non-Inverting 8-PDIP |
DataSheet: | MIC4422ABN Datasheet/PDF |
Quantity: | 1000 |
1 +: | 0.00000 |
Logic Voltage - VIL, VIH: | 0.8V, 3V |
Base Part Number: | MIC4422 |
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): | 20ns, 24ns |
Input Type: | Non-Inverting |
Current - Peak Output (Source, Sink): | 9A, 9A |
Series: | -- |
Voltage - Supply: | 4.5 V ~ 18 V |
Gate Type: | N-Channel MOSFET |
Number of Drivers: | 1 |
Channel Type: | Single |
Driven Configuration: | Low-Side |
Part Status: | Obsolete |
Packaging: | Tube |
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MIC4422ABN Application Field and Working Principle
The MIC4422ABN is an advanced power IC designed to drive power loads in switching power supply applications. This integrated circuit belongs to the PMIC - Gate Drivers family, being originally developed to facilitate the drive of power MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors). It can be used as a standalone controller or in combination with external components to form a synchronous buck regulator.
MOSFET gate drivers are switching power ICs optimized to drive the gates of power MOSFETs, providing a wide range of application-specific features to boost the efficiency of their operation. Microchip Technology introduced their own version of the MOSFET gate driver IC, the MIC4422ABN, to help design engineers efficiently build reliable, cost-effective and highly efficient switching power supply systems, providing multiple features and a proper choice of package.
Features
The MIC4422ABN by Microchip features onboard protection of both the high-side and low-side MOSFETs, eliminating the need for additional space, cost and components. It ensures the availability of the system and robustness of its operation against any misbehavior of the user and potential system failure. Its 5V supply and 3.3V logic level compatibility makes it easier to set up the entire switching power supply system with minimal configurability.
The power MOSFET drivers in this integrated circuit can provide up to 8A peak source and sink currents, configurable dead time, normal and low-side floating synchronization control and pre-drivers for efficiency improvements. All of these features make the MIC4422ABN a perfect choice for designing high-speed and high-efficiency synchronous buck regulators.
Working Principle
The workflow of the MIC4422ABN is relatively simple. It should be powered with two supply voltages, one is the 5V system power while the other is the 3.3V logic level. After initializing the circuit, the input enable signal should be applied in order to enable the half-bridge driver. Afterwards, the gate voltage across the high-side and low-side power MOSFETs is regulated by the PWMin and PWMan control signals. Both of them generate a complementary periodic drive waveform, whose ratio is controlled by the PWM-to-Manual Duty Cycle ratio selector while their frequency is controlled by the Internal Oscillator or the synchronization pin.
Finally, the PWM High Gain switches turn the pre-driver on and off upon the PWMin or PWMan activation providing the necessary high-turn-on gate drive which reduces the switching losses in the power supply application. Other features of the MIC4422ABN are the overcurrent protection, thermal warning and small signal distortion, solid low-side floating control, etc.
Conclusion
The MIC4422ABN by Microchip is an advanced, high-performance power IC designed to drive the gates of power MOSFETs in switching power supply systems. It features onboard protection, configurable dead time, a 5V supply and 3.3V logic level compatibility, pre-driver integration, PWM-to-Manual Duty Cycle ratio selector, and many other features. With a proper configuration, it can boost the efficiency of both synchronous buck and boost converters while providing a reliable operation.
The specific data is subject to PDF, and the above content is for reference
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