L4970A

Voltage - Output (Min/Fixed):	5.1V
Base Part Number:	L4970A
Supplier Device Package:	15-Multiwatt
Package / Case:	Multiwatt-15 (Vertical, Bent and Staggered Leads)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	200kHz
Current - Output:	10A
Voltage - Output (Max):	40V
Series:	--
Voltage - Input (Max):	50V
Voltage - Input (Min):	15V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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The L4970A is a monolithic integrated circuit designed to drive smart LED systems with a fraction of components while providing high performance. It is part of a family of DC-DC switching regulators that are capable of operating between input voltages of 6V to 70V and offers adjustable output voltages up to 40V. With a wide input range, fast transient responses, and low power dissipation, it is suitable for automotive applications such as smart headlights, fog lights, and tail light dimming.The principal of operation for the L4970A DC-DC switching regulator is based on a fixed frequency synchronous boost topology. This topology features a high side MOSFET and a low-side MOSFET connected in apush-pull configuration. These MOSFETs are connected to a gate drive circuit to control their operation. The gate circuit is powered by an internal charge pump for stable gate drive power. With this architecture, the switching regulator is able to convert a lower input voltage to a higher output voltage.The L4970A features several features to provide better performance and higher efficiency. An internal PWM controller is used to regulate the output voltage. It also has an automatic burst mode to reduce the switching frequency in light loads, leading to decreased power consumption. The main oscillator and the step-up converter can handle high-transient conditions and provide a fast transient response with high efficiency.Other features such as over-voltage protection and over-thermal protection are included to ensure the safe and reliable operation of the device. Additionally, several additional protocol compliant interface options are available, such as I2C and PWM, to interact with a range of micro-controllers and FPGAs. This could potentially enable current and brightness control of the LEDs from a higher-level system.In summary, the L4970A DC-DC switching regulator offers a reliable and highly efficient solution for powering efficient LED based lighting systems. With its wide input voltage range, fast transient response, low power dissipation, and a variety of interface options, it is an ideal choice for a wide range of automotive lighting applications.

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