UC3825ADW

Dual 2 A, 1000 kHz
3,111 Effective Inventory

UC3825ADW

Effective Inventory3,111

Dual 2 A, 1000 kHz

  • Manufacturer Part # : UC3825ADW

  • Package/Case: SOIC-16

  • Brand: Texas Instruments

  • Product Categories : DC DC Switching Controllers

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Service & Packaging

Service & Packaging

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UC3825ADW DataSheet
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Please submit RFQ for UC3825ADW or email to us: Email: [email protected], we will contact you in 12 hours.

Details

One of the standout features of the UC3825ADW is its programmable oscillator, which grants users the freedom to customize the switching frequency to their specific needs. This flexibility makes the device adaptable to various design requirements, enabling engineers to fine-tune their power supply designs for maximum performance. The inclusion of a voltage feedforward control loop further enhances the load regulation of the power supply, ensuring stable and reliable operation across different load conditions

UC3825ADW

Key Features

  • UC3825ADW is a versatile pulse width modulation controller IC
  • It offers adjustable deadtime control to prevent shoot-through in push-pull or half-bridge configurations
  • The IC includes a high-speed error amplifier, allowing for precise voltage regulation
  • It features a flexible oscillator with adjustable frequencies up to 500kHz
  • UC3825ADW has a voltage reference precision of ±1%

    • Application

    • Ensures high-frequency pulse-width modulation
    • Optimal for power management systems

    Specifications

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

    Topology Boost, Buck, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current, Voltage
    Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 1000
    Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Leading edge blanking, Multi-topology, Programmable max duty cycle, Soft start, Synchronization pin UVLO thresholds on/off (V) 9.2/8.4
    Operating temperature range (°C) 0 to 70 Rating Catalog
    Gate drive (typ) (A) 2 Vin (max) (V) 22

    Datasheet PDF

    Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

    Preliminary Specification UC3825ADW PDF Download

    FAQs

    What is UC3825ADW?

    The UC3825ADW is a high-performance, current-mode PWM controller designed by Texas Instruments. It is commonly used in power supply applications to regulate the output voltage and control the power delivery to various electronic devices.

    How Does UC3825ADW Work?

    The UC3825ADW operates as a current-mode PWM controller, where it compares a current signal representing the output voltage with a reference voltage to generate a control signal that adjusts the duty cycle of the PWM waveform. This control method provides fast transient response and inherent current limiting, making it suitable for power supply designs.

    How Many Pins does UC3825ADW have and What are the Functions of the Pinout Configuration?

    The UC3825ADW is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:

    • VCC: Power supply pin.
    • COMP: Compensation pin for loop stability.
    • RT/CT: Timing components (resistor and capacitor) for setting oscillator frequency.
    • UVLO: Under Voltage Lock-Out control pin.
    • SD, +SENSE, -SENSE: Shutdown and current sense pins.
    • FB: Feedback pin for output voltage regulation.
    • OUTA, OUTB: PWM outputs for driving external power switches.

    What are the Pros and Cons of UC3825ADW?

    Pros:

    • Current-Mode Control: Offers fast transient response and inherent current limiting.
    • Wide Input Voltage Range: Suitable for various power supply designs.
    • Protection Features: Includes under-voltage lockout and shutdown pins for system protection.
    • External Clock Synchronization: Supports synchronization to an external clock signal.
    • Enhanced Efficiency: Improves power conversion efficiency in power supply applications.

    Cons:

    • Complex Design: Requires careful consideration of loop stability and component selection for optimal performance.
    • External Components: May need additional external components for specific application requirements.
    • Noisier Operation: Current-mode control can introduce noise in certain circuit layouts.

    Are There Any Equivalents/Alternatives to UC3825ADW for Recommendation?

    • The UC3842 from Texas Instruments is a similar current-mode PWM controller with slightly different features.
    • Alternatives to the UC3825ADW include the SG3525A from STMicroelectronics and the IR2153 from Infineon Technologies.

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