UC2845ADG4

Frequency - Switching:	500kHz
Base Part Number:	UC2845A
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):	48%
Series:	--
Voltage - Supply (Vcc/Vdd):	7.6 V ~ 30 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, Forward Converter
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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UC2845ADG4 Application Field and Working Principle

PMIC (Power Management Integrated Circuit) is a micro electronic integrated circuit which combines power management, power management and electronic control. PMICs are widely used in portable electronic products, such as mobile phones, PDAs, digital cameras and other portable electronic products, because they make the power system more compact and have higher efficiency. As a kind of PMIC, DC/DC Switching Controllers have the advantages of adjustable wide input voltage range, high efficiency and wide output voltage range, and can reduce circuit area, so they are widely used in many electronic products. The UC2845ADG4 is the representative of DC/DC Switching Controllers, and it has an operating temperature range of -40℃ to +125℃, a wide operating voltage range from 4.5V to 18V, and a 2A internal power switch. The UC2845ADG4 is a monolithic switching voltage regulator controller specifically designed for Off-Line and DC to DC converter applications with minimal external parts. It is designed to offer new savings in board space and cost in applications such as Switch Mode Power Supplies, Battery Chargers and DC to DC Converters. It is available with a choice of two different regulator types - fixed frequency and PWM, to suit different application requirements.The fixed frequency control mode of UC2845ADG4 is a pulse width modulation (PWM) control strategy that regulates the output voltage and maintains steady regardless of load. This kind of control is suitable for electronic products with large current changes.The PWM mode of the UC2845ADG4 is a voltage mode pulse width modulation (PWM) control strategy, which is a type voltage control. Under this strategy, the output will not be affected by any sudden change of power, thus supporting high power density.The UC2845ADG4 monitor pin can also detect the current, so it can realize the current-limiting protection and over-temperature protection. In addition, the device also has fault protection circuitry to detect any abnormal condition, triggering a fault signal flag.Overall, the UC2845ADG4 is applicable to a wide range of applications, such as switch mode power supplies, battery chargers, DC/DC converters, digital home appliances, etc. It provides high performance in a small package. It\'s cost-efficiency, stability and temperature, current and voltage control make it a suitable choice for many applications.

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