LM2577 DC-DC Step-Up Power Converter Module

Description

Product Overview

The LM2577 DC-DC Step-Up Power Converter Module is a high-performance boost switching regulator designed to convert lower DC voltages into higher, adjustable output voltages. Based on the industry-standard LM2577 chip from Texas Instruments, this module efficiently steps up voltages from sources such as 3.7V Li-ion batteries, 5V USB, or 12V car batteries to higher levels like 12V, 24V, or even 48V .

Unlike linear regulators that waste excess voltage as heat, this switching regulator uses Pulse Width Modulation (PWM) technology at a fixed 52kHz switching frequency to achieve conversion efficiencies of up to 80% . This makes it ideal for battery-powered applications where power conservation is critical. The module can deliver up to 3A of output current and supports a wide input voltage range from 3.5V to 40V .

The LM2577 is highly versatile, supporting boost, flyback, and forward converter topologies . It includes built-in protection features such as current limiting, undervoltage lockout, thermal shutdown, and a soft-start function to reduce inrush current during startup . This module is the perfect choice for powering devices that require higher voltage than your available power source can provide—whether you’re building a portable power supply, charging lithium battery packs, or driving high-voltage LED arrays.

Key Features

• Adjustable Output Voltage: Provides continuously adjustable output from 1.23V to 60V via onboard potentiometer, allowing you to set exactly the voltage your project needs

• High-Efficiency Step-Up Conversion: Utilizes the LM2577 switching regulator with 52kHz fixed-frequency oscillator to achieve up to 80% efficiency, minimizing power loss and heat generation

• Wide Input Voltage Range: Accepts DC input from 3.5V to 40V, compatible with single-cell Li-ion (3.7V), USB (5V), car batteries (12V), and industrial power sources

• 3A High Output Current: Capable of delivering up to 3A of output current (peak). For loads above 2A, a heatsink is recommended

• Multiple Topology Support: Can be configured as a boost (step-up), flyback, or forward converter for maximum design flexibility

• Built-in Protection Features: Includes output switch current limiting, undervoltage lockout, and thermal shutdown to safeguard the module and your connected devices

• Soft-Start Function: Reduces inrush current during startup, protecting both the module and the power source

• Wide Operating Temperature: Rated for operation from -40°C to +125°C, suitable for demanding industrial and automotive environments

• Requires Few External Components: Simple design with minimal external components, making the module compact and reliable

Technical Specifications