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UC3844D +BOM

Single ended 500KHz current mode PWM controller with 16V/10V UVLO 50% duty cycle, 0C to 70C

UC3844D Information

Description

The UC3844D is a Current Mode PWM Controller designed by Texas Instruments (TI). It's a semiconductor component that enables efficient power management and control in various applications. With its features, such as current sense input with adjustable threshold, automatic feed forward compensation, and pulse-by-pulse current limit, this controller ensures reliable operation and prevents damage from overcurrent conditions. The UC3844D is suitable for use in switch-mode power supply applications, including AC-DC and DC-DC converters, battery chargers, LED drivers, and voltage regulators. It can also be employed in motor control systems, lighting systems, and industrial equipment to manage power efficiently. With its wide VCC range of 8V to 20V, the UC3844D provides flexibility for various voltage requirements. In summary, the UC3844D is a current mode PWM controller that enables efficient power management and control in various applications with features such as current sense input, automatic feed forward compensation, and overcurrent shutdown.

Features

According to the product information, the features of the UC3844D are:

  • Voltage mode control PWM controller
  • Current sense input with adjustable threshold
  • Automatic feed forward compensation
  • Adjustable soft-start
  • Pulse-by-pulse current limit
  • Overcurrent shutdown
  • UVLO (Undervoltage Lockout) with hysteresis
  • Wide VCC range (8V - 20V)

These features make the UC3844D suitable for various applications such as switch-mode power supply, motor control, lighting systems, and industrial equipment.

Package

The package type of UC3844D is SOIC-14 (Small Outline Integrated Circuit, 14-pin).

Manufacturer

The manufacturer of the UC3844D is Texas Instruments (TI), a well-known American technology company that designs, manufactures, tests, and sells semiconductors, including integrated circuits and embedded systems solutions. TI is one of the largest and most successful semiconductor companies in the world, with a wide range of products used in many industries, including consumer electronics, automotive, medical devices, and more.

Applications

The UC3844D is commonly used in switch-mode power supply applications, including AC-DC and DC-DC converters, battery chargers, LED drivers, and voltage regulators. It can also be utilized in motor control, lighting systems, and industrial equipment for efficient power management and control functions.

Equivalent

The equivalent products of UC3844D are:

  • ST's L4970
  • ON Semi's NCP3801
  • Analog Devices' ADP8860
  • Texas Instruments' LM5026

These ICs offer similar current-mode PWM controller functionality and can be used as alternatives in various applications.

Specifications

Category Integrated Circuits (ICs)Power Management (PMIC)DC DC Switching Controllers Output Type Transistor Driver
Function Step-Up, Step-Down, Step-Up/Step-Down Output Configuration Positive, Isolation Capable
Topology Boost, Buck, Buck-Boost, Flyback, Forward Number of Outputs 1
Output Phases 1 Voltage - Supply (Vcc/Vdd) 12V ~ 28V
Frequency - Switching Up to 500kHz Duty Cycle (Max) 48%
Synchronous Rectifier No Clock Sync No
Serial Interfaces - Control Features Frequency Control
Operating Temperature 0°C ~ 70°C (TA) Mounting Type Surface Mount
Base Product Number UC3844 Product Category Switching Controllers
Output Voltage 4.9 V to 5.1 V Output Current 1 A
Minimum Operating Temperature 0 C Maximum Operating Temperature + 70 C
Mounting Style SMD/SMT Operating Supply Voltage 30 V
Product Type Switching Controllers Subcategory PMIC - Power Management ICs
Type Current Mode PWM Controllers Unit Weight 0.011923 oz
Package/Case SOP14

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Ratings and Reviews

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E
E**y 01/05/2024

Shipping one and a half weeks, track is not tracked. Put in a mailbox

1
S
S**u 04/28/2022

Received the product without any problem. Fast shipping and reasonable prices. I recommend this store.

8
J
J**b 09/25/2020

Sold handsome! I ordered one thing, and i got two! Both work. Zbs. But delivery from _ ka p _ z mega long!

10

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