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UC1845AMDREP

Current Mode PWM Controller 1A 500kHz 8-Pin SOIC T/R

Inventory:5,436

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Overview of UC1845AMDREP

The UC1845AMDREP is a high-performance current-mode PWM controller IC suitable for power supply applications. It offers precise regulation of output voltage and current, making it ideal for various power management systems.

Pinout

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

  • COMP: Compensation Pin for control loop stability
  • RT/CT: Timing components connection for oscillator frequency adjustment
  • CT: Timing capacitor connection for oscillator frequency control
  • RT: Timing resistor connection for oscillator frequency control
  • REF: Reference Voltage for feedback loop
  • VC: Output voltage control pin
  • VREF: Reference Voltage for error amplifier
  • GND: Ground connection
  • OUT: Power supply output
  • VCC: Power supply input
  • SYNC: Synchronization input for multiple converters
  • FB: Feedback input for regulating output voltage

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the UC1845AMDREP IC for a visual representation.

Key Features

  • Current-Mode PWM Controller: Provides precise regulation of output voltage and current.
  • Adjustable Oscillator Frequency: Allows customization of switching frequency for different applications.
  • High Efficiency: Enhances power conversion efficiency in power supply designs.
  • Overcurrent Protection: Ensures safety and reliability by limiting output current during fault conditions.
  • Wide Input Voltage Range: Operates with a broad input voltage range, suitable for various power supply systems.
  • Soft Start Capability: Facilitates smooth power-up operation to prevent voltage overshoot.

Note: For detailed technical specifications, please refer to the UC1845AMDREP datasheet.

Application

  • Switched-Mode Power Supplies: Ideal for controlling and regulating power in SMPS applications.
  • DC-DC Converters: Suitable for use in DC-DC converter circuits for power management.
  • Battery Chargers: Used in battery charger designs to maintain precise charging parameters.

Functionality

The UC1845AMDREP current-mode PWM controller is designed to deliver stable and efficient power regulation in various power supply applications, ensuring reliable performance and protection against faults.

Usage Guide

  • Input Power: Connect VCC (Pin 10) to the power supply input voltage.
  • Output Regulation: Use the COMP (Pin 1) and FB (Pin 12) pins for output voltage regulation.

Frequently Asked Questions

Q: What is the maximum switching frequency of the UC1845AMDREP?
A: The UC1845AMDREP offers an adjustable oscillator frequency ranging up to 500kHz for flexible power supply design.

Q: Does the UC1845AMDREP provide overcurrent protection?
A: Yes, the UC1845AMDREP features overcurrent protection to safeguard the circuit during abnormal operating conditions.

Equivalent

For similar functionalities, consider these alternatives to the UC1845AMDREP:

  • UC3845: A popular current-mode PWM controller IC suitable for power supply and motor control applications.
  • TL494: This PWM control circuit offers versatile features for power supply regulation and control.

Specifications

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

Topology Boost, Flyback, Forward Control mode Current
Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 500
Features Error amplifier, Multi-topology UVLO thresholds on/off (V) 8.4/7.6
Operating temperature range (°C) -55 to 125 Rating HiRel Enhanced Product
Gate drive (typ) (A) 1 Vin (max) (V) 25

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packageimg

UC1845AMDREP

Current Mode PWM Controller 1A 500kHz 8-Pin SOIC T/R

Inventory:

5,436