• UC3843BVD1R2G SOIC-8
UC3843BVD1R2G SOIC-8

UC3843BVD1R2G

Current Mode Control

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Overview of UC3843BVD1R2G

The UC3843BVD1R2G is a current-mode PWM controller IC designed for use in switching power supplies and LED drivers. It features a precision voltage reference and high-performance error amplifier, making it ideal for controlling power delivery in various applications.

Pinout

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

  • VCC: Positive power supply
  • CS: Current sense input for regulating output
  • RT: Timing resistor input for frequency control
  • CT: Timing capacitor input for frequency control
  • GND: Ground connection
  • OUT: Output of the PWM signal
  • FB: Feedback input for error correction

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the UC3843BVD1R2G IC for a visual representation.

Key Features

  • Current-Mode PWM Control: Enables precise regulation of output by monitoring output current.
  • High Efficiency: The UC3843BVD1R2G offers high efficiency in power conversion applications, reducing energy loss.
  • Precision Voltage Reference: Includes a precise voltage reference for accurate control of output voltage.
  • Wide Operating Voltage Range: Operates within a wide voltage range, making it suitable for various power supply designs.
  • Error Amplifier: Features a high-performance error amplifier for efficient error correction in power regulation.

Note: For detailed technical specifications, please refer to the UC3843BVD1R2G datasheet.

Application

  • Switching Power Supplies: Ideal for controlling power delivery in switching power supply designs.
  • LED Drivers: Suitable for LED driver applications requiring precise current regulation.
  • Power Conversion: Used in various power conversion applications to ensure efficient power delivery.

Functionality

The UC3843BVD1R2G is a current-mode PWM controller that provides accurate and efficient control of power delivery in a wide range of applications, including switching power supplies and LED drivers.

Usage Guide

  • Power Supply: Connect VCC (Pin 1) to the positive power supply and GND (Pin 6) to ground.
  • Feedback Loop: Use the FB pin (Pin 7) to provide error correction feedback for stable operation.
  • Timing Components: Connect RT (Pin 3) and CT (Pin 4) to external timing components for setting frequency control.

Frequently Asked Questions

Q: Can the UC3843BVD1R2G be used in high-power applications?
A: The UC3843BVD1R2G is suitable for a range of power levels, but for high-power applications, it is recommended to consult the datasheet for specific limitations and considerations.

Q: Is the UC3843BVD1R2G compatible with digital control interfaces?
A: Yes, the UC3843BVD1R2G can interface with digital control interfaces using appropriate signal conversion and interfacing circuitry.

Equivalent

For similar functionalities, consider these alternatives to the UC3843BVD1R2G:

  • UC3844: A similar current-mode PWM controller with slightly different specifications and performance characteristics.
  • SG3525: This PWM controller IC offers comparable functionality to the UC3843BVD1R2G with variations in features and performance.

UC3843BVD1R2G

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 Flyback
Control Mode Current Mode fsw Typ (kHz) 52
Stand-by Mode No UVLO (V) Yes
Short Circuit Protection Yes Latch No
Soft Start Yes VCC Max (V) 30
Drive Cap. (mA) 200 / 200 Pricing ($/Unit) $0.24

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