LM27222MX

Current - Peak Output (Source, Sink):	3A, 4.5A
Base Part Number:	LM27222
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Rise / Fall Time (Typ):	17ns, 12ns
High Side Voltage - Max (Bootstrap):	33V
Input Type:	Non-Inverting
Series:	--
Logic Voltage - VIL, VIH:	--
Voltage - Supply:	4 V ~ 6.85 V
Gate Type:	N-Channel MOSFET
Number of Drivers:	2
Channel Type:	Synchronous
Driven Configuration:	Half-Bridge
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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IntroductionPower Management Integrated Circuit (PMIC) or PMIC is a miniature chip that is designed to provide reliable and efficient power management solution for any application. The Power Management Integrated Circuits (PMICs) have been widely used in various kinds of industrial, military, commercial and consumer applications.One of the most popular PMIC types is the Gate Drivers, that are integrated circuits that are used to control the switching and protection of power converter and motor control circuits. Gate Drivers can be used to conversely drive and protect power MosFets and IGBTs in order to control their switching times. Driving a large power switch with a microcontroller is not viable, and that’s where the gate drives come into play.The LM27222MX is a Gate Driver amplifier that is typically used as a driver for small motors, switching power converters, and small transistors. It is an integrated circuit with two low side DMOS driver output stages, one high side DMOS driver output stage, and several circuits which can be used to control the logic signals that are sent to the gates of the power devices.ConstructionThe LM27222MX gate driver amplifier is built using the reliable MOSFET technology and contains two low side driver output stages, one high side, and several circuits that control the logic signal inputs which drive the gates of the power switches. Furthermore, it also includes an undervoltage protection feature that shuts down the outputs when the supply voltage drops below 4.3V. The chip contains a wide range of logic options and is available in an MSOP-10 package.The main feature of the LM27222MX chip is its functional flexibility. It can be used to drive both low and high side MOSFETs or IGBTs. Additionally, it can provide multiple voltage level, constant off-time, or PWM inputs for controlling the supply voltage, current and frequency using a variety of logic signals. Moreover, the chip also provides a temperature protection feature that prevents damages caused by over-temperature conditions.Working PrincipleThe LM27222MX works by taking input logic signals from a microcontroller or other logic source and translating it into the specific logic signals needed to control the gate of power switches. The chip is capable of driving both low and high side MOSFETs as well as IGBTs with a frequency of up to 80MHz.The two low side driver output stages provide a low-voltage mode, allowing up to 18V of voltage to be driven through the gates of the power switches. This feature is particularly useful when controlling large motors, where the high-voltage mode can be used to control the entire range of power switches.In addition, the chip contains a temperature-sensing circuit, which helps prevent over-temperature conditions that could damage the power switch. The temperature-sensing circuit detects temperature higher than the pre-set reference value and triggers an over-temperature warning.ApplicationsThe LM27222MX is a versatile gate driver amplifier that has a wide range of applications. It can be used in various kinds of industrial, military, commercial and consumer applications. For example, it can be used to control the switching and protection of power converters, small motors, and small transistors.Moreover, it is also suitable for driving any type of DC/DC converters, including variable frequency drives, flyback PFC Boosts, Uninterruptible Power Supply (UPS), AC to DC power converters, and motor control circuits. Additionally, the chips can be used in other specialized applications, such as medical equipment, automotive, defense, and aerospace systems.Conclusion The LM27222MX chip is a versatile Gate Driver amplifier that is typically used as a driver for small motors, switching power converters, and small transistors. It is an integrated circuit with two low side DMOS driver output stages, one high side DMOS driver output stage, and several circuits which control the logic signal inputs that drive the gates of the power switches.The chip is suitable for various kinds of industrial, military, commercial and consumer applications such as DC/DC converters, variable frequency drives, UPS, AC to DC power converters, and motor control circuits. Additionally, it can also be used for specialized applications such as medical equipment, automotive, defense, and aerospace systems. This chip is ideal for those applications that require reliable and efficient power management solutions, due to its capability of providing multiple voltage levels, constant off-time, and PWM inputs for controlling the supply voltage, current, and frequency. Furthermore, it comes with a temperature protection feature that prevents damages caused by over-temperature conditions.

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