Professional IC Distribution & Technical Solutions

Global leader in semiconductor components distribution and technical support services, empowering your product innovation and industry advancement

Product Catalog Contact Us
Home > others05 > UC3843B

UC3843B Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
UC3843BPROMAX-JOM213Yes

UC3843B is a high-performance current-mode PWM controller manufactured by Motorola (MOT).

The UC3843B is a high-performance current-mode PWM controller manufactured by Motorola (MOT).

Specifications:

  • Topology: Current-mode PWM control
  • Operating Frequency: Up to 500 kHz
  • Output Drive: Single-ended output (suitable for driving MOSFETs)
  • Duty Cycle Range: 0% to 100%
  • Supply Voltage (VCC): 8V to 30V
  • Start-up Current: Typically 0.5 mA
  • Under-Voltage Lockout (UVLO): 8.4V (on) / 7.6V (off)
  • Peak Output Current: ±1A (sink/source)
  • Error Amplifier Bandwidth: 1 MHz
  • Reference Voltage (VREF): 5V (±1%)
  • Operating Temperature Range: -40°C to +85°C

Descriptions:

The UC3843B is designed for DC-DC converter applications, providing precise control for power supplies. It features a trimmed oscillator for accurate frequency control, a temperature-compensated reference, and a high-gain error amplifier.

Features:

  • Current-Mode Operation: Improves loop response and simplifies compensation.
  • Automatic Feed-Forward Compensation: Enhances line regulation.
  • Latching PWM: Ensures single-pulse operation per cycle.
  • Undervoltage Lockout (UVLO): Ensures reliable start-up and shutdown.
  • High-Current Totem Pole Output: Directly drives power MOSFETs.
  • Cycle-by-Cycle Current Limiting: Protects against overloads.
  • Low Start-up and Operating Current: Improves efficiency.

This IC is commonly used in flyback, forward, and boost converters.

Request Quotation

Part Number:
Quantity:
Target Price($USD):
Email:
Contact Person:
Additional Part Number
Quantity (Additional)
Special Requirements
Verification: =

Recommended Products

  • MUR1220CT ,200,TO220

    MUR1220CT** is a high-efficiency, ultra-fast recovery rectifier manufactured by ON Semiconductor.

  • PP0100 ,100,TEP-5L

    Part PP0100 Manufacturer Specifications, Descriptions, and Features** ### **Manufacturer Specifications:** - **Part Number:** PP0100 - **Material:** High-quality polymer or metal (varies by application) - **Operating Temperature Range:** -40°C

  • NE649N ,200,DIP16

    NE649N is a high-frequency transistor manufactured by SIGENT.

  • TIBPAL16R4-12CN,TI,20,DIP20

    47C1238AN-UA07,TOSHIBA,20,DIP54

Sales Support

Our sales team is ready to assist with:

  • Fast quotation
  • Price Discount
  • Technical specifications
Contact sales