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See Technical Specifications

UC3844AD8

This device is suitable for power supply designs where efficiency and flexibility are key priorities

Manufacturer:

Texas Instruments
Mfr.Part #:

UC3844AD8
Datasheet:

UC3844AD8 Datasheet (PDF)
Topology:

Boost, Buck, Buck boost, Flyback, Forward
Control mode:

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

50
Switching frequency (max) (kHz):

500
EDA/CAD Models:

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UC3844AD8 General Description

The UC3844AD8 is a high-performance voltage mode controller designed for offline and DC-DC converter applications. It features a current source and a high-speed bipolar operational amplifier for increased stability and bandwidth. The device operates over a wide input voltage range of 8V to 30V and provides a 1.5A peak output current capability.The UC3844AD8 offers adjustable switching frequency up to 500kHz, adjustable peak current limiting, and soft-start functionality to minimize in-rush current during startup. It also includes under-voltage lockout, pulse-by-pulse current limiting, and over-current protection to ensure reliable and safe operation.This controller comes in an 8-pin SOIC package, making it suitable for compact designs with limited board space. It is ideal for applications such as isolated and non-isolated power supplies, battery chargers, LED drivers, and motor drives where high efficiency and precise control are required.

Key Features

Low-cost current mode controller

Operating voltage range of 8V to 20V

500mA output current capability

Oscillator frequency range of 50kHz to 1MHz

Internal soft-start function

Integrated error amplifier

Protection against overload and short circuit conditions

Available in an 8-pin SOIC package

Application

The UC3844AD8 is commonly used in applications such as switch-mode power supplies, battery chargers, LED drivers, and other power management functions

It is also suitable for use in industrial, automotive, and consumer electronic devices that require efficient and reliable voltage regulation

Specifications

Topology	Boost, Buck, Buck boost, 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)	0 to 70	Rating	Catalog
Gate drive (typ) (A)	1	Vin (max) (V)	28