MIC38C44BM-TR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - High-performance voltage mode PWM controller - Designed for offline flyback converters - Provides precise control of output voltage and current - Offers protection features for enhanced reliability

Package: SOIC-8

Essence: The MIC38C44BM-TR is a voltage mode PWM controller that is widely used in offline flyback converters. It enables precise control of output voltage and current, ensuring efficient power conversion.

Packaging/Quantity: The MIC38C44BM-TR is available in a standard SOIC-8 package. Each package contains one IC.

Specifications

• Input Voltage Range: 10V to 30V
• Output Voltage Range: 5V to 24V
• Maximum Output Current: 2A
• Switching Frequency: 100kHz to 500kHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MIC38C44BM-TR has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. COMP: Compensation pin for feedback loop
4. CS: Current sense input
5. FB: Feedback voltage input
6. RT/CT: Timing resistor/capacitor connection
7. OUT: Output voltage
8. SS: Soft-start capacitor connection

Functional Features

• Voltage mode control for precise regulation
• Adjustable switching frequency for optimization
• Overvoltage protection for enhanced safety
• Overcurrent protection for reliable operation
• Soft-start function for controlled startup
• Error amplifier with high gain for accurate feedback

Advantages and Disadvantages

Advantages: - Precise control of output voltage and current - Enhanced reliability with protection features - Adjustable switching frequency for optimization - Soft-start function for controlled startup

Disadvantages: - Limited maximum output current (2A) - Restricted operating temperature range (-40°C to +85°C)

Working Principles

The MIC38C44BM-TR operates on the voltage mode control principle. It compares the feedback voltage (FB) with a reference voltage and adjusts the duty cycle of the PWM signal accordingly. This regulates the output voltage and current. The IC also incorporates various protection features, such as overvoltage and overcurrent protection, to ensure safe and reliable operation.

Detailed Application Field Plans

The MIC38C44BM-TR is commonly used in offline flyback converters, which are widely employed in various applications, including:

1. Power supplies for consumer electronics
2. LED lighting systems
3. Battery chargers
4. Industrial automation equipment
5. Telecommunication devices

Detailed and Complete Alternative Models

1. MIC38C42BM-TR: Similar voltage mode PWM controller with lower maximum output current (1A).
2. MIC38C43BM-TR: Comparable voltage mode PWM controller with higher maximum output current (3A).
3. MIC38C45BM-TR: Alternative voltage mode PWM controller with wider operating temperature range (-40°C to +105°C).

These alternative models provide similar functionality to the MIC38C44BM-TR but may have different specifications or additional features to suit specific application requirements.

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