LM5107SD

Current - Peak Output (Source, Sink):	1.3A, 1.4A
Base Part Number:	LM5107
Supplier Device Package:	8-WSON (4x4)
Package / Case:	8-WDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Rise / Fall Time (Typ):	15ns, 15ns
High Side Voltage - Max (Bootstrap):	118V
Input Type:	Non-Inverting
Series:	--
Logic Voltage - VIL, VIH:	0.8V, 2.2V
Voltage - Supply:	8 V ~ 14 V
Gate Type:	N-Channel MOSFET
Number of Drivers:	2
Channel Type:	Independent
Driven Configuration:	Half-Bridge
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The LM5107SD is a single-channel, low-side gate driver optimized for direct driving of single-MOSFET power switches that use a separate ground and power rail for each switch. It stands out among other PMIC - Gate Drivers due to its high-side gate drive capability and fast switching time. With the LM5107SD, designers have an integrated, full-feature solution for interfacing a variety of switching topographies to microcontrollers.

Applications

The LM5107SD has a wide variety of applications in power conversion and switching power supply design. It is typically used in systems that need a low-side and high-side gate driver to independently control switch nodes. It can also be used to quickly and easily drive low-side and high-side MOSFETs in high-dynamic switch mode applications, such as AC-DC or DC-DC converters, DC motor drives, and automotive power trains. The LM5107SD also offers low-side gate drive capability, making it ideal for Brushless DC (BLDC) motor applications and other applications that require frequent high-speed switching of low-side power switches. In BLDC motor applications, the LM5107SD can switch up to 10 times faster than semiconductor-based gate driver solutions, providing improved performance and efficiency. In addition, the LM5107SD can take full advantage of the advanced features of a microcontroller, such as embedded pulse-width modulation (PWM) signals, programmable pull-up/down resistors, and slew rate control. This makes it ideal for applications that require precise control over the power switch on/off timing.

Features and Benefits

The LM5107SD is designed to deliver superior performance and reliability in power supply design. Its output current is rated up to 5A peak and its quiescent supply current is rated at just 6mA, allowing it to operate with a wide range of supply voltages. It also features low-side and high-side gate drive capability, allowing it to power both low-side and high-side MOSFETs in power conversion applications.The device has a built-in undervoltage lockout (UVLO) function that ensures the gate drive voltage is within an accepted range. In addition, the LM5107SD features adjustable dead time and an adjustable slew rate that allows the user to adjust the rise and fall time of the gate voltage. The high-side gate drive voltage is designed to minimize switching losses and provide fast on-off transitions to reduce power dissipation.In addition, the LM5107SD can be programmed to prevent shoot-through currents between high-side and low-side switches, which can reduce power loss and increase system reliability in power conversion applications.

Working Principle

The LM5107SD is a gate driver integrated circuit (IC) which provides an output voltage or current that provides gate drive power to the low-side or high-side gate of the power device (e.g. MOSFET). The gate driver provides the required gate voltage/current to turn on/off the power device.The LM5107SD implements several protection mechanisms to ensure optimum performance of the power device and prevent damage to the system. For example, the device implements a UVLO protection mechanism that ensures that the gate voltage is within the recommended range when powering the device. The device also has a shoot-through current protection that ensures that when the high-side and low-side gate of the power device are both activated, no current will flow. This prevents short circuit and minimizes power losses. Finally, the LM5107SD has a built-in slew-rate control that reduces power dissipation by controlling the rate at which the gate voltage ramps up and down. This helps reduce the EMI generated by the system.

Conclusion

The high-side gate drive of the LM5107SD makes it ideal for power conversion and switch mode applications that require independent control of two switch nodes. Additionally, the device features built-in protections and adjustable slew rate that allow the user to get the most out of their power supply design. The LM5107SD is an easy to use, high-performance gate driver IC for PMIC - Gate Drivers.

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