UC2843AD Integrated Circuits (ICs)

Frequency - Switching:	Up to 500kHz
Base Part Number:	UC2843A
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	96%
Series:	--
Voltage - Supply (Vcc/Vdd):	7.6 V ~ 30 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Buck, Buck-Boost, Flyback, Forward
Output Configuration:	Positive
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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Introduction to the UC2843AD

The UC2843AD is an integrated pulse width modulated DC-DC switching controller. It is a voltage regulator used in PMICs (Power Management Integrated Circuits) that is designed to control the switching of DC-DC converters. Designed to handle current and voltage requirements up to 2A, the UC2843AD is a versatile, efficient and cost-effective choice for PMIC applications.

Application Field

The UC2843AD\'s can be used in a wide variety of applications. These include, but are not limited to, boost converters, off-line SMPSs, flyback converters, SEPIC converters, and synchronous rectifiers. The UC2843AD can be easily configured for various topologies, output voltages and features, making it a great choice for engineers looking for an easy to use, reliable and efficient switching regulator.

Features and Specifications

The UC2843AD is a 3-45V rated, low power voltage regulator capable of a maximum current of 2A and a switching frequency of up to 300kHz. It features frequency control and feedback compensation, as well as soft start, enabling more reliable and accurate current and voltage regulation. Additionally, the UC2843AD has a low minimum operating voltage, allowing it to operate in tough environmental conditions.

Working Principle

The UC2843AD is a pulse width modulated DC-DC switching controller with an integrated voltage regulator. The controller works by switching a power MOSFET on and off at a fixed rate, thus regulating the voltage and current output of the DC-DC converter. The pulse width modulation (PWM) allows the controller to finely tune the output voltage, while the integrated regulator allows it to maintain a stable voltage across an entire range of input voltages.

Conclusion

The UC2843AD is a versatile, cost-effective and reliable voltage regulator designed for PMIC applications. By providing frequency control, feedback compensation and soft start features, it is ideal for controlling a variety of DC-DC converters. Its low minimum operating voltage makes it suitable for a wide range of environments, making it a great choice for engineers looking for a reliable, easy to use and efficient voltage regulator.

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