Description
Product Overview
The LM2596HVS Adjustable DC-DC Buck Converter Module is a high-performance, high-voltage step-down switching regulator designed to efficiently convert higher DC voltages (up to 50V) into a lower, continuously adjustable output. Based on the LM2596HVS (High Voltage Series) chip, this module is specifically engineered for applications that require stable power from higher voltage sources such as 36V, 48V, or even 54.6V electric vehicle battery packs .
Unlike standard LM2596 modules that typically max out at 40V input, the LM2596HVS variant supports input voltages up to 50V (absolute maximum 57V), making it the ideal choice for 48V industrial systems, electric vehicles (e-bikes, scooters, golf carts), solar battery banks, and telecom equipment . The module accepts a wide DC input range of 4.5V to 50V and provides an adjustable output from 1.25V to 40V via an onboard precision potentiometer .
At its core, the LM2596HVS utilizes a fixed 150kHz switching frequency and advanced PWM technology to achieve conversion efficiencies of up to 92% . This high efficiency means the module runs cooler and wastes significantly less power than linear regulators, making it ideal for battery-powered or enclosed applications. The module can deliver up to 3A of continuous output current, with higher currents (2.5A-3A) requiring a heatsink for thermal management .
This module is widely used in 48V vehicle accessories (LED lights, fans, USB chargers), industrial control systems, 36V/48V solar charge controllers, and DIY benchtop power supplies. Its ability to step down 48V to 12V, 5V, or any voltage between 1.25V and 40V makes it an incredibly versatile power solution for professionals and hobbyists alike.
Key Features
-
High Input Voltage Range: Accepts DC input from 4.5V to 50V (absolute max 57V), supporting 12V, 24V, 36V, and 48V systems including full 48V e-bike batteries (54.6V max) .
-
Adjustable Output Voltage: Provides continuously adjustable output from 1.25V to 40V via onboard precision potentiometer, allowing you to set exactly the voltage your project needs .
-
High-Efficiency Step-Down Conversion: Achieves up to 92% conversion efficiency, minimizing power loss and heat generation compared to linear regulators .
-
3A High Output Current: Capable of delivering up to 3A of continuous output current. For loads above 2A (or >10W output power), a heatsink is strongly recommended .
-
Fixed 150kHz Switching Frequency: Operates at a fixed 150kHz internal oscillator, allowing for smaller-sized filter components and lower output ripple (≤30mV typical) .
-
Comprehensive Protection: Includes thermal shutdown, current limit protection (two-stage frequency reducing current limit for the output switch), and some variants feature input reverse polarity protection .
-
Ultra-Low Quiescent Current: Standby current consumption of only 5mA-10mA (80µA in shutdown mode), making it suitable for always-on applications in electric vehicles .
-
Industrial Temperature Range: Designed to operate reliably from -40°C to +85°C, suitable for demanding industrial and outdoor environments .
-
Compact Form Factor: Small PCB footprint (approx. 43mm × 21mm × 14mm) allows for easy integration into space-constrained projects .
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Input Voltage | DC 4.5V – 50V (Absolute Max 57V) |
| Output Voltage | DC 1.25V – 40V (Continuously adjustable) |
| Output Current | 3A (Max), 2A – 2.5A Recommended |
| Minimum Input-Output Differential | 1.5V (input must be > output + 1.5V) |
| Switching Frequency | 150 kHz |
| Conversion Efficiency | Up to 92% |
| Output Ripple | ≤ 30mV (typical) |
| Quiescent Current (Active) | 5mA – 10mA |
| Standby Current (Shutdown) | 80µA typical |
| Load Regulation | < 1% (12V to 5V @ 1A) |
| Protection Features | Thermal Shutdown, Current Limit |
| Operating Temperature | -40°C to +85°C |
| Module Dimensions | Approx. 43mm × 21mm × 14mm |
| Weight | Approx. 10g – 15g |
Reviews
There are no reviews yet.