MIC29302AWD

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MIC29302AWD is a dual high-side MOSFET driver from original Linear semiconductor manufacturer. This chip is designed primarily to drive two complimentary MOSFETs or two parallel single N-Channel MOSFETs in a low side or high side configuration with high level of current capability. It provides a unique powerful high side switch solution suitable for driving high current and up to 40V load.

Introduction

MIC29302AWD is an Integrated circuit which provides the necessary features to generate an output voltage which is precisely regulated at a set level, these devices are highly reliable, robust and flexible solutions with high accuracy and excellent dynamic performance. It is designed to enable highest performance switching applications, protecting and controlling power lines in both circuits and systems.

Application Areas

The unique on-chip features and high level of integration make it ideal for a wide range of applications, including:

• DC to DC converters
• Power over Ethernet switches
• Portable equipment
• Networking equipment
• Industrial motor control
• Power management solutions

Features

MIC29302AWD offers advanced features, including:

• High current capability: 6A for single MOSFET, 12A for complimentary pair
• On-chip slew rate control
• Low connection capacitance and low power dissipation of 0.5W without external parts
• On-chip soft start for improved hot-swapping protection
• Exceptional high accuracy regulation
• Under-voltage Lockout (UVLO) to protect against low operation and shutdown
• Programmable frequency selecting between 200kHz to 800kHz
• Tolerant of high voltage transient
• Thermal Shutdown Protection
• Overvoltage Protection

Working Principle

The MIC29302AWD works by providing an adjustable output voltage via feedback from a sensing point. The sensing point typically comprises a resistor divider connected to the output. The voltage between the power supply and ground is sensed by the voltage regulator and is compared to the reference voltage to identify any difference between them. This difference is then amplified and used to drive the control circuitry.

The control circuitry consists of a pair of compensation MOSFETs, which control the output voltage level. These devices adjust their conduction levels to provide the required output voltage. The amount of voltage regulation is determined by the feedback system, with the range set by the resistor divider ladder.

The MIC29302AWD also includes a high power driver to control the MOSFETs. This is monitored by an on-chip UVLO and Includes short-circuit protection, overload protection, thermal overload protection and overvoltage protection to ensure that the output voltage stays stable.

Conclusion

The MIC29302AWD is an ideal choice for a range of industrial applications, offering advanced features including high current capability, excellent dynamic performance and a high level of integration. Applications include DC to DC converters, power over Ethernet switches, portable equipment and networks, industrial motor control and power management solutions.

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