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

  • BC33740 ,1000,TO92

    BC33740** is a **NPN Bipolar Junction Transistor (BJT)** commonly used for general-purpose amplification and switching applications.

  • 7920BC ,212,DIP8

    7920BC** is a manufacturer-specific EPON (Ethernet Passive Optical Network) ONU (Optical Network Unit) device.

  • RC0603JR-07200KL ,100000,0603ECCN: EAR99

    Manufacturer:** YAGEO **Part Number:** RC0603JR-07200KL **Type:** Thick Film Chip Resistor ### **Specifications:** - **Resistance Value:** 200 kΩ - **Tolerance:** ±5% - **Power Rating:** 0.

  • 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