L6743BTR Integrated Circuits (ICs)

Current - Peak Output (Source, Sink):	2A, -
Base Part Number:	L6743
Supplier Device Package:	8-VFDFPN (3x3)
Package / Case:	8-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C (TJ)
Rise / Fall Time (Typ):	--
High Side Voltage - Max (Bootstrap):	41V
Input Type:	Non-Inverting
Series:	--
Logic Voltage - VIL, VIH:	0.8V, 2V
Voltage - Supply:	5 V ~ 12 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Part Status:	Obsolete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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L6743BTR Application Field and Working Principle

PMIC (Power Management Integrated Circuit) Gate Drivers are becoming increasingly ubiquitous in modern designs due to the need for controlling rapidly changing and power-constrained applications. In order to meet the high frequency, high efficiency requirements of these applications, advanced technologies such as GaN (Gallium Nitride) and SiC (Silicon Carbide) are being explored as potential solutions. STMicroelectronics’ L6743BTR “Switch Mode Power Converter (SMPC)” is one such PMIC designed with these advanced technologies in mind, allowing designers to more easily control the more powerful and power-hungry applications they are working with. The L6743BTR is a dual-channel, high-efficiency PMIC that can deliver up to 1.5A of current. The IC is designed to be used with a wide range of power rail voltages, including both AC and DC. It integrates low-side and high-side N-channel MOSFETs, allowing the user to employ cascode and synchronous rectifiers to further increase efficiency, while also providing protection against current reverse flow. Additionally, the device features overvoltage protection, undervoltage lockout, current limitation, and over-temperature protection. The working principle of the L6743BTR can be broken down into four parts. First, the device’s dual-channel design allows it to handle up to four power domains from one IC. This simplifies the design process by reducing the number of components and optimizing the power pool layout by reducing the number of power transistors. Secondly, the device can switch at high frequencies of up to 1 MHz. This allows designs to react quickly to changes in power input, making it ideal for high-frequency, power-hungry applications. The internal PLL circuit also allows users to sync their designs with the power input and reduce power losses caused by the output stage. Thirdly, the device is able to provide a wide operating voltage range, from 7 to 40V. This allows designers to employ higher voltages when designing power-constrained applications, while still being able to keep the required power level at optimal levels with the help of the device’s low-side and high-side MOSFETs. Finally, the device also provides several protections, including overvoltage, undervoltage lockout, current limitation, and over-temperature protection. These protection features ensure that the design does not get damaged in the event of sudden power fluctuations or other potentially damaging occurrences. Overall, the L6743BTR is a highly efficient and flexible PMIC designed to meet the high frequency, power-hungry needs of modern designs. Its dual-channel design, high switching frequencies, wide voltage range, and protection features all set it apart from other PMICs on the market, making it an ideal choice for designers who are looking to get the most out of their designs.

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