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See Technical Specifications

UC2844N +BOM

Current Mode PWM Controller

Manufacturer:

Texas Instruments
Mfr.Part #:

UC2844N
Datasheet:

UC2844N Datasheet (PDF)
Topology:

Boost, Buck, Flyback, Forward
Control Mode:

Peak current mode
Duty Cycle (max) (%):

50
Switching Frequency (max) (kHz):

500
EDA/CAD Models:

Request Free CAD Models for UC2844N

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UC2844N General Description

The UC2844N is a high-performance current-mode controller designed for use in switching power supplies. It features an internal oscillator with frequency up to 500kHz, allowing for efficient operation in a wide range of applications. The device also includes a precision reference voltage of 5V, adjustable soft start, and current-limiting function to protect against overcurrent conditions.The UC2844N offers a wide input voltage range of 8V to 35V, making it suitable for use in various power supply designs. It features a low output impedance and high gain error amplifier for accurate regulation of output voltage. The device can drive both power N-channel MOSFETs and bipolar power transistors, providing flexibility in design.

Key Features

High-performance integrated circuit for controlling flyback, boost, and SEPIC converters

Programmable PWM oscillator with adjustable dead time

Current limiting and soft-start function to protect against overloads

Precision voltage reference and error amplifier for reliable regulation

Wide input voltage range and high switching frequency capabilities

Application

The UC2844N is commonly used in switch mode power supplies, battery chargers, and motor control applications

It is also utilized in LED drivers, industrial control systems, and solar inverters

The device is versatile and offers high efficiency and reliability in various power management applications

Specifications

Topology	Boost, Buck, Flyback, Forward	Control mode	Peak current mode
Duty cycle (max) (%)	50	Switching frequency (max) (kHz)	500
Features	Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology	UVLO thresholds on/off (V)	16/10
Operating temperature range (°C)	-40 to 85	Rating	Catalog
Gate drive (typ) (A)	1	Vin (max) (V)	28