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MIC38C43-1BM from MICREL

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MIC38C43-1BM

Manufacturer: MICREL, MIC, MICROCHIP

BiCMOS Current-Mode PWM Controllers

Partnumber Manufacturer Quantity Availability
MIC38C43-1BM,MIC38C431BM MICREL, MIC, MICROCHIP 1064 In Stock

Description and Introduction

BiCMOS Current-Mode PWM Controllers # **Introducing the MIC38C43-1BM: A High-Performance Current-Mode PWM Controller**  

The **MIC38C43-1BM** is a versatile and efficient current-mode pulse-width modulation (PWM) controller designed for high-performance power supply applications. Engineered to deliver precision and reliability, this advanced IC is ideal for switch-mode power supplies (SMPS), DC-DC converters, and offline power systems.  

## **Key Features and Benefits**  

- **Current-Mode Control** – The MIC38C43-1BM employs current-mode operation for improved transient response and simplified feedback loop compensation, ensuring stable performance under varying load conditions.  
- **Wide Operating Frequency Range** – With an adjustable oscillator frequency up to **1MHz**, this controller supports high-frequency designs, enabling compact and efficient power solutions.  
- **Programmable Soft-Start** – The integrated soft-start feature minimizes inrush current during startup, protecting components and enhancing system longevity.  
- **Under-Voltage Lockout (UVLO)** – Built-in UVLO ensures reliable operation by preventing the controller from functioning outside safe voltage thresholds.  
- **High-Current Totem Pole Output** – The **2A peak output current** capability allows direct drive of power MOSFETs, reducing the need for additional gate drive circuitry.  

## **Applications**  

The MIC38C43-1BM is well-suited for a variety of power management applications, including:  
- AC-DC and DC-DC converters  
- Telecom and industrial power supplies  
- LED drivers and battery chargers  
- Auxiliary power modules  

## **Why Choose the MIC38C43-1BM?**  

With its robust design, high efficiency, and flexible configuration options, the MIC38C43-1BM stands out as a reliable choice for engineers seeking a high-performance PWM controller. Its ability to optimize power conversion while maintaining stability makes it an excellent solution for modern power supply designs.  

For designers looking to enhance system efficiency and reliability, the MIC38C43-1BM offers a compelling combination of features and performance, making it a top contender in power management applications.

Application Scenarios & Design Considerations

BiCMOS Current-Mode PWM Controllers

Alternative Part Number

  • UC3843BD1 --: Industry-standard current-mode PWM controller in the same functional class as the MIC38C43; widely available SOIC-8 pin-compatible replacement with similar UVLO thresholds.
  • SG3843BD --: Direct functional equivalent current-mode PWM controller from a major vendor, matching the 8-pin package and operating characteristics of the original.
  • TL3843BP --: Well-known 3843-series current-mode controller offering comparable performance and pinout, suitable as a drop-in substitute when package variant is acceptable.
  • UC3843AN --: Industry-standard current-mode PWM controller in the same family as the MIC38C43, widely available and functionally equivalent for most flyback/boost designs.
  • SG3843M --: Pin-compatible current-mode PWM controller with similar UVLO thresholds and drive capability, suitable drop-in replacement in SOIC packages.
  • TL3843P --: Low-cost 3843-series current-mode controller with comparable electrical characteristics, good second-source option when exact MIC part is unavailable.

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