L4960H

Voltage - Output (Min/Fixed):	5.1V
Base Part Number:	L4960
Supplier Device Package:	7-HEPTAWATT
Package / Case:	Heptawatt-7 (Horizontal, Bent and Staggered Leads)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	100kHz ~ 150kHz
Current - Output:	2.5A
Voltage - Output (Max):	40V
Series:	--
Voltage - Input (Max):	46V
Voltage - Input (Min):	9V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tube

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Introduction to L4960H

The L4960H is part of STMicroelectronics\' range of switching voltage regulators, specifically it is categorised as a DC-DC switching regulator. It is a monolithic integrated circuit designed as a cost effective solution for off-line power supply systems with minimal external components. It is made on a BCD (Bipolar, CMOS and DMOS) technology combined with advanced circuit design techniques. The L4960H is designed to operate in a wide input voltage range from 9V to 40V and have a high efficiency level of more than 87%. It can offer output voltage adjustable from 1.2V to 37V with a maximum output current limit of 3A.

Application field

The L4960H is an ideal choice for many applications. It is used to boost and down regulate output voltages, mainly in applications that require quick response, such as in LCD display, television, and notebook computers. Additionally, the L4960H can be used to power lighting systems, power amplifiers, industrial machines, robotics and other control systems. It is suitable for off-line applications where low power dissipation is needed.

Working Principle

The L4960H is an DC-DC switching regulator that provides flexible, reliable and cost-effective power solutions for off-line applications. The output voltage is adjustable over a wide range via a single external resistor. The L4960H has an excellent transient response, which allows for higher power loads and faster load transients. Its operation is based on pulse width modulation (PWM) and relies on a range of operating frequency, from 50Khz - 500Khz, to achieve the desired output voltage based on the incoming voltage. The L4960H is a current mode switching regulator which need minimum external components to deliver optimum performance. Its enables the control circuitry to have a fast response time and ensures stable operation. Its high efficiency is maintained even at low loads and it supports variable switching frequencies. The L4960H has a very low start-up current so only a fraction of the power is needed to begin operation and to reach there fully functional running condition. It has several advanced features like output overvoltage protection and a thermal cut-off protection. This makes it very safe and reliable for applications requiring high precision and safety.

Conclusion

The L4960H is a versatile and cost effective DC-DC switching regulator with wide input voltage range and adjustable output voltage. It has many features designed to give it a high efficiency, quick transient response and excellent stability in applications. Its advanced features allow for a high-level of protection, making it an ideal choice for applications requiring high precision and safety.

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