LM2596S DC-DC Adjustable Buck Power Supply Module Step Down Voltage Regulator Board With Digital Display Constant Current Voltage

📌 LM2596 Series DC-DC Step Down Buck Power Supply Module Full Range

🔎 Product Overview

LM2596 series DC-DC adjustable step-down buck modules adopt original LM2596S / LM2596HVS switching regulator chip, high-efficiency step-down conversion, wide input voltage range, adjustable output voltage via precision blue potentiometer, multiple versions for different application demands: standard voltage-adjustable, high-voltage 60V HVS, CC/CV constant current constant voltage charging, LED constant current driver, digital voltmeter display versions. Working temperature: -40℃ ~ +85℃. All modules feature built-in power inductor, large filter electrolytic capacitors, short-circuit & overheat protection, compact PCB design, screw terminal / pin hole wiring optional, low heat, stable output for industrial control, DIY electronics, battery charging, LED lighting projects.

🧠 Core Chip & Model Classification

1. LM2596S Standard Version
   • Input: 3V ~ 40V DC
   • Output: 1.25V ~ 37V adjustable
   • Max Output Current: 3A
   • Application: General low-voltage step-down power supply
   • PCB Color: Red / Blue bare board optional
2. LM2596HVS High Voltage Version
   • Input: 4.5V ~ 60V DC
   • Output: 1.25V ~ 58V adjustable
   • Max Output Current: 3A
   • Application: High voltage input industrial equipment, 48V system power conversion
3. LM2596HVS LED Constant Current Driver Module (Dual Potentiometer)
   • Dual trimming potentiometers: Voltage adjustment + Current adjustment
   • Wide 60V input, constant current drive for high-power LED strips / lamp beads
   • Over-current protection for LED lighting
4. LM2596S CC/CV Constant Current Constant Voltage Module (Triple Potentiometer)
   • Triple blue potentiometers: Output voltage limit, charging current limit, floating voltage
   • Perfect for lithium battery lead-acid battery charging, CC-CV charging curve
5. LM2596S Digital Display Step-Down Module
   • Onboard 3-digit digital voltmeter real-time display output voltage
   • Independent buttons for voltage calibration, power switch function
   • Screw terminal block for easy wiring, no soldering required

⚙ Main Electrical Parameters

• Conversion Efficiency: Up to 92%
• Switching Frequency: 150KHz fixed
• Output Ripple: Low ripple noise with large filter capacitor
• Protection Function: Short circuit protection, overheat thermal shutdown, over-current protection
• Adjustment Component: Blue 3296 precision trimming potentiometer
• Rated Power: Max 75W
• Operating Temperature: -40℃ ~ +85℃
• Load Regulation & Line Regulation: Excellent stability under variable input & load

📦 Each Version Feature Breakdown

1. LM2596S Blue Bare Board Buck Module Single potentiometer voltage adjustment, blue PCB, pin hole terminals, standard 3-40V input, general DIY power supply.
2. LM2596S Red Bare Board Buck Module Same electrical specs as blue version, red PCB circuit board, low cost basic voltage regulator.
3. LM2596HVS-ADJ High Voltage Buck Module Support up to 60V input, single potentiometer voltage regulation, for high voltage DC power conversion.
4. LM2596HVS LED Constant Current Driver Module Dual potentiometers for voltage & current setting, dedicated high-power LED constant current power supply.
5. LM2596S CC/CV Constant Current Constant Voltage Charging Module Three potentiometers to set charging current, cut-off voltage, floating voltage, battery charging dedicated module.
6. LM2596S Digital Display Voltage Regulator Module (HW-368) Built-in digital tube voltage display, input/output screw terminals, calibration button, visual voltage monitoring.
7. LM2596S Digital Display Step-Down Module (HW-816) Upgraded digital display board, power on/off button, independent input/output terminal blocks, voltage real-time readout.

✨ Product Advantages

• ✅ Full Series Coverage: Standard, high voltage, constant current, charging, digital display multiple models to meet all power supply needs
• ✅ High Efficiency Step Down: Up to 92% conversion efficiency, less heat generation, no heat sink required for normal load
• ✅ Wide Input Voltage: HVS version supports maximum 60V input, compatible with 12V/24V/36V/48V DC power sources
• ✅ Precision Adjustable Output: 3296 multi-turn potentiometer, fine-tune voltage/current accurately
• ✅ Complete Safety Protection: Short-circuit, overheat, over-current triple protection, avoid load & module burnout
• ✅ Multiple Wiring Options: Pin hole soldering or screw terminal quick connection, convenient installation
• ✅ Industrial Wide Temperature: Stable operation at -40℃ ~ +85℃, suitable for outdoor & industrial equipment
• ✅ Low Ripple Filter Circuit: Large capacity electrolytic capacitors + power inductor, smooth DC output voltage

🛠 Application Scenarios

1. DIY Electronic Projects: Arduino, ESP32, single-chip microcomputer power supply
2. Battery Charging: Lithium battery, lead-acid battery CC-CV charging (triple potentiometer CC/CV model)
3. LED Lighting: High power LED lamp beads, LED strip constant current drive (HVS constant current LED version)
4. Industrial Control Equipment: 12V/24V/48V industrial equipment secondary step-down power supply
5. Vehicle Electronics: Car, electric motorcycle DC voltage conversion
6. Instrument Power Supply: Adjustable laboratory test regulated power supply

⚠ Usage Reminders

1. Do not exceed the maximum input voltage of each model, HVS max 60V, standard LM2596S max 40V
2. Adjust potentiometer under no-load state first, then connect load to avoid overvoltage damage to electrical equipment
3. Constant current charging module must set charging current within battery safe range
4. Kind reminder: If there are version differences or images not been updated, please refer to the actual product.