UC2844ANG4

Frequency - Switching:	Up to 500kHz
Base Part Number:	UC2844A
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	48%
Series:	--
Voltage - Supply (Vcc/Vdd):	10 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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The UC2844ANG4 – Versatile and Robust DC to DC Switching ControllerThe UC2844ANG4 is an advanced DC to DC switching controller made for applications such as AC adapters, on-board non-isolated DC to DC converters, battery chargers, and switching power supplies. It offers a wide range of features specifically designed for improving system protection, reliability, and accuracy. The controller provides a wide range of programmability to allow users to adapt to their specific application and component requirements, improving system efficiency and performance.Application FieldsThe UC2844ANG4 is ideal for a variety of applications. It is used in AC adapters and DC-DC converters to provide regulated output voltages and in battery chargers to improve charging efficiency and accuracy. It is also used in precision power controllers, LED drivers, telecommunication circuits, point of load converters, solar micro-inverters and motor control applications.FeaturesThe UC2844ANG4 features an array of features designed to support a wide range of applications. It features low quiescent current consumption, allowing it to be used in energy-sensitive applications. Additionally, it includes a highly accurate output voltage regulation system and current-mode control which provides fast dynamic response and high-efficiency operation for more robust and reliable system performance.Integrated into the UC2844ANG4 are a variety of protection features. These include line under-voltage lockout, output over-voltage shutdown, thermal shutdown, over current protection, and programmable current limit settings. The controller is also configured to support external ramp compensation for more precise output voltage control.Working PrincipleThe UC2844ANG4 is a non-isolated, DC to DC switching controller. It employs a fixed frequency current-mode control technique to switch a power transistor on and off in order to regulate the output voltage. The current output of the controller is determined by the voltage applied to the FB (Feedback) pin. When the feedback pin is at or below a certain voltage, the controller will keep the power switch off. When it rises above this point, the controller will turn the switch on. This causes the output voltage to be regulated at a certain level.ConclusionThe UC2844ANG4 is a versatile and robust DC to DC switching controller for a wide selection of applications. Designed for use in energy sensitive applications, the controller offers a variety of features for improved system protection and accuracy. The controller uses current-mode control for fast dynamic response and high-efficiency operation, as well as external ramp compensation for more precise voltage control. With its advanced features and high-performance capabilities, the UC2844ANG4 is an ideal choice for many applications.

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