LM2577 DC-DC Digital Voltmeter Booster Module

Description

Product Overview

The LM2577 DC-DC Digital Voltmeter Booster Module is a high-performance step-up (boost) switching regulator that combines the reliable LM2577 chip with a built-in digital voltmeter display. This all-in-one module efficiently converts lower DC voltages (from 3V) into higher, adjustable output voltages up to 35V, while allowing you to monitor both input and output voltages in real-time without an external multimeter .

Based on the Texas Instruments LM2577 switching regulator, this module operates at a fixed 52 kHz switching frequency and achieves conversion efficiencies of up to 80% . The integrated 3-digit LED display can be toggled between input and output voltage readings with a single button, making it incredibly convenient for benchtop use, battery-powered projects, and field adjustments.

The module features a high-precision multi-turn potentiometer for output voltage adjustment, a power-down memory function that recalls your last voltage setting, and the ability to turn off the display to save power . Whether you’re powering 12V devices from a 5V USB source, charging battery packs, or creating a variable bench power supply, this module provides a complete, user-friendly solution.

Key Features

• Integrated 3-Digit LED Display: Shows input or output voltage at the press of a button (±0.1V accuracy, 0-40V range), eliminating the need for an external multimeter

• Adjustable Output Voltage: Continuously adjustable from 4V to 35V via onboard precision multi-turn potentiometer

• Wide Input Voltage Range: Accepts DC input from 3V to 34V, compatible with 3.7V Li-ion batteries, 5V USB, 12V car batteries, and 24V industrial supplies

• 3A High Output Current: Capable of delivering up to 3A output current (2.5A continuous recommended). Input current can reach 3A

• High Conversion Efficiency: Up to 80% efficiency with 52 kHz fixed-frequency oscillator, minimizing power loss and heat generation

• Built-in Protection Features: Includes current limiting, undervoltage lockout, thermal shutdown, and soft-start function to reduce inrush current during startup

• Power-Down Memory Function: Automatically remembers and displays the last measured voltage when power is restored

• Display On/Off Control: Press and hold the button for 3 seconds to turn off the LED display, saving power in battery applications; press again to reactivate

• Screw Terminal Connections: Features wiring terminals for easy, solderless installation

Technical Specifications