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UC3845N +BOM

The UC3845N is an AC-DC controller and regulator that is ROHS certified and comes in a DIP-8 package

UC3845N Information

Description

The UC3845N is a current-mode PWM controller from Texas Instruments, designed for voltage regulation with adjustable frequency support. It features a soft start function for smooth startup and precision ensured. This IC is commonly used in switch-mode power supplies for voltage regulation and control, as well as in offline and DC-to-DC converters, battery chargers, LED drivers, and inverters for renewable energy systems. Its advanced features include frequency adjustable, voltage feed-forward compensation supported, and soft start function ensures smooth startup. The UC3845N is suitable for various applications including SMPS and DC-DC converters, offering fast response time, high precision, and reliability.

Features

The UC3845N features include:

  • Current mode PWM controller
  • Soft start function for smooth startup
  • Adjustable frequency support
  • Voltage feed-forward compensation supported
  • Precise control over power converters
  • Fast response time, high precision, and reliability
  • Suitable for various applications including SMPS and DC-DC converters

These features make the UC3845N a versatile and efficient PWM controller suitable for a wide range of applications in power electronics.

Package

The package type of UC3845N is DIP-8 (Dual In-Line Package with 8 pins).

Pinout

The UC3845N has a pin count of 8 (DIP-8). The pin functions are:

  • Pin 1: OUT - PWM output
  • Pin 2: COMP - Compensation input
  • Pin 3: VCC - Positive supply voltage
  • Pin 4: GND - Ground
  • Pin 5: FB - Feedback input
  • Pin 6: RST - Reset input
  • Pin 7: CT - Current sense input
  • Pin 8: SHDN - Shutdown input

This information is based on the Texas Instruments datasheet for the UC3845N.

Manufacturer

The manufacturer of the UC3845N is Texas Instruments (TI). Texas Instruments is a leading American technology company that designs, manufactures, tests, and sells semiconductors and other electronic components. The company was founded in 1930 and is headquartered in Dallas, Texas. TI is a well-known brand in the semiconductor industry, offering a wide range of products including microcontrollers, analog ICs, interface ICs, logic ICs, and more.

Applications

According to the product information, the application areas of UC3845N include:

  • Switch-mode power supplies for voltage regulation and control
  • Offline and DC-to-DC converters
  • Battery chargers
  • LED drivers
  • Inverters for renewable energy systems
  • Industrial and automotive electronics for efficient power management

Equivalent

According to Texas Instruments' documentation, the UC3845N has several equivalent products:

  • UC3846N
  • UC3847N
  • LM5104 (dual-frequency controller)
  • TL494 (fixed-frequency PWM controller)

These products share similar features and applications with the UC3845N, offering varying degrees of frequency adjustment, soft-start functionality, and voltage regulation capabilities.

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 Through Hole
Base Product Number UC3845 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 Through Hole Operating Supply Voltage 30 V
Product Type Switching Controllers Factory Pack Quantity 1000
Subcategory PMIC - Power Management ICs Type Current Mode PWM Controllers
Unit Weight 0.032805 oz Package/Case DIP8

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Ratings and Reviews

More
J
J**n 01/24/2024

Everything is ok. The product corresponds to the description.

12
C
C**b 01/18/2024

The give 5 star. Item no. Where did you send it? He knows! Three weeks passed, komariki, on the balloon, would have already arrived with the parcel.

15
M
M**n 03/14/2023

Great product small but strong enough recommend this seller Thank you

6
J
J**i 11/05/2022

Twice business chance with Sue Kim is so happy and smooth. The parts they provide is brand new! The way Sue Kim work is very professional and he is also very kind-hearted.Hope more chance with avaq

7

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In Stock: 4,894

Minimum Order: 1

Qty. Unit Price Ext. Price
1000+ $1.006 $1,006.00
500+ $1.034 $517.00
100+ $1.095 $109.50
30+ $1.235 $37.05
10+ $1.370 $13.70
1+ $1.587 $1.59

The prices above are for reference only.

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