LB11920-E

Step Resolution:	--
Supplier Device Package:	28-DIP
Package / Case:	28-SDIP (0.500", 12.70mm) Exposed Pad
Mounting Type:	Through Hole
Operating Temperature:	-20°C ~ 80°C (TA)
Voltage - Load:	9.5 V ~ 30 V
Voltage - Supply:	4.5 V ~ 5.5 V
Current - Output:	3.5A
Applications:	General Purpose
Series:	--
Technology:	Bipolar
Interface:	Parallel
Output Configuration:	Half Bridge (3)
Function:	Driver - Fully Integrated, Control and Power Stage
Motor Type - AC, DC:	Brushless DC (BLDC)
Motor Type - Stepper:	--
Part Status:	Obsolete
Packaging:	Cut Tape (CT)

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. LB11920-E Application Field and Working PrinciplePMIC – Motor Drivers, ControllersThe LB11920-E from Sanken Electric Co., Ltd. is a switchmode power supply controller chip used in a variety of applications, including motor drivers, controllers, and other power conversion circuits. The chip features low standby power consumption and high efficiency, both important aspects when it comes to conserving energy. This article will discuss the application fields and working principle of the LB11920-E.The applicationfields of this controller cover applications such as DC / DC converters for automotive or industrial, AC / DC converters for residential and commercial, solar inverters, and wind grid inverters. Thanks to its compact size, the LB11920-E can be used to downsize power supply systems and reduce the number of components required in the circuits. Further, its wide input voltage range, high frequency capability and low switching loss combine to make the chip suitable for a range of applications.The LB11920-E consists of several functional blocks that determine its working principle. Firstly, an internal MOSFET with a built-in PNP and N-channel MOSFET helps to improve power conversion efficiency and minimize EMI noise. Secondly, a built-in maximum current comparator ensures that the current consumption does not exceed the set level and a built-in open loop protection removes the risk of over-current conditions.Thirdly, protections such as thermal shutdown and absolute maximum can be activated when the chip reaches a certain temperature or sees an over-voltage event, ensuring that any potential damage is avoided. The fourth block is a variable frequency clock pwm generator, which controls the on/off switching of the internal MOSFETs and regulates the chip’s output voltage.The LB11920-E can be used in applications that require low output noise, high efficiency, and a wide input voltage range. The controller can also regulate the output voltage in both rising and falling cases, ensuring a stable supply even in cases of drastic load changes.The LB11920-E, therefore, proves to be an all-in-one power supply controller, combining several features in one compact chip. Its protection functions and variable frequency pwm generator, in particular, make it the ideal choice for applications that require wide input voltage range and the ability to handle large load variations and surges. In conclusion, the LB11920-E is a versatile and powerful power supply controller chip. It is suitable for a range of applications and provides reliable protection as well as high efficiency and low noise. This makes it an ideal choice for motor driving, controlling, and power conversion applications.

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