• UC3845BD1R2G SOIC-8
UC3845BD1R2G SOIC-8

UC3845BD1R2G

8-Pin SOIC N T/R

Inventory:7,166

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Overview of UC3845BD1R2G

The UC3845BD1R2G is a high-performance fixed-frequency current-mode controller that provides constant regulation for power supplies and other electronic systems. It features a voltage reference, error amplifier, current sensing comparator, and a high-current totem pole output, making it suitable for various switching power applications.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • VREF: Voltage Reference Output
  • OUTPUT: Error Amplifier Output
  • SENSE: Current Sense Input
  • RT/CT: Oscillator Timing Components Connection
  • DISC/THD: Discharge/Fault/Threshold Setting
  • RT/CT: Oscillator Timing Components Connection
  • VCC: Positive Power Supply
  • GND: Power Ground

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the UC3845BD1R2G for a visual representation.

Key Features

  • Constant-Frequency Operation: Provides fixed-frequency current-mode control for stable regulation.
  • High-Current Totem Pole Output: The totem pole output stage ensures high current sourcing and sinking capabilities.
  • Internal Regulator: Integrated voltage reference and error amplifier for simplified power supply designs.
  • Programmable Oscillator: Allows flexibility in setting frequency and timing for specific application requirements.
  • Overcurrent Protection: Built-in current sensing and fault detection for enhanced system safety.

Note: For detailed technical specifications, please refer to the UC3845BD1R2G datasheet.

Application

  • Switching Power Supplies: Ideal for use in various switching power supply designs for efficient energy conversion.
  • DC-DC Converters: Suitable for controlling and regulating DC-DC converter systems in electronic devices.
  • LED Drivers: Can be used in LED driver circuits for constant current regulation and brightness control.

Functionality

The UC3845BD1R2G is a versatile current-mode controller designed to provide stable regulation and control in switching power supplies and related applications. Its integrated features and programmable capabilities make it a reliable choice for power management.

Usage Guide

  • Power Supply: Connect VCC (Pin 6) to the positive power supply and GND (Pin 7) to the ground.
  • Oscillator Components: Connect the RT/CT (Pin 4) to the timing components for setting the oscillator frequency.
  • Current Sensing: Use the SENSE (Pin 3) input for current sensing in the power supply circuit.

Frequently Asked Questions

Q: What is the maximum frequency of operation for the UC3845BD1R2G?
A: The UC3845BD1R2G operates at a maximum fixed frequency determined by the external timing components connected to the RT/CT pin.

Q: Can the UC3845BD1R2G be used in LED lighting applications?
A: Yes, the UC3845BD1R2G can be utilized in LED driver circuits to provide constant current regulation and control.

Equivalent

For similar functionalities, consider these alternatives to the UC3845BD1R2G:

  • UC3843A: This is a current-mode PWM controller with similar features and performance for power supply applications.
  • TL494: A versatile PWM controller IC suitable for various power supply and converter designs.

UC3845BD1R2G

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Status Active Compliance PbAHP
Package Type SOIC-8 Case Outline 751-07
MSL Type 1 MSL Temp (°C) 260
Container Type REEL Container Qty. 2500
ON Target N Topology Step-Up
Control Mode Current Mode fsw Typ (kHz) 52
Stand-by Mode No UVLO (V) Yes
Short Circuit Protection Yes Latch No
Soft Start No VCC Max (V) 25
Drive Cap. (mA) 200 / 200 Pricing ($/Unit) $0.2191Sample

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