LM2596 DC Buck Step Down with LCD (ARD87E)

M2596 DC-DC Buck Step-Down Converter (with Digital Voltmeter)

1. Voltage Measurement Accuracy

• Built-in digital voltmeter with accuracy of ±0.1V
• Measurement range: 0 – 40V DC
• Note: For accurate readings, input voltage must be ≥ 4V

2. Display Function Switching

• Touch button allows switching between:
  • Input voltage display
  • Output voltage display
• LED indicator shows which voltage is currently being measured

3. Power-Off Memory Function

• Stores the last measured voltage display setting
• Automatically restores previous setting after power is reconnected

4. Display Control (Energy Saving)

• Press and hold touch button for 3 seconds to turn OFF LED display
• Short press to turn ON display again

5. Terminal Design

• Equipped with screw/band terminals
• No soldering required for basic wiring
• Secure and easy wire connection points

6. Input Voltage Range

• Input DC voltage: 4.0V – 40V
• Input voltage must be at least 1.5V higher than output voltage for proper regulation

7. Output Voltage Range

• Adjustable output voltage: 1.25V – 37V DC
• Continuously adjustable via onboard potentiometer
• Input must exceed output by approximately 1.5V

8. Output Current Capability

• Maximum output current: 3A
• Recommended continuous stable current: 2A
• (Proper cooling recommended for higher loads)

9. Switching Frequency & Efficiency

• Internal switching frequency: 150 kHz
• Second-generation switching regulator design
• Features:
  • Low power consumption
  • High efficiency DC-DC conversion

10. LED Indicator

• Built-in LED status indicator
• Typically red LED for power/display status