This LM2596 Constant Voltage / Constant Current (CC/CV) regulator module is a very flexible and adaptable charging solution that can provide either a Constant Voltage (CV) or Constant Current (CC) output. With a variable output voltage range of 1.25V to 30V and variable output current from 0A to 3A, DC Buck Charger LM2596 is ideal for use as an LED or laser diode current source/driver, a battery charger, a lab current/voltage source, or to regulate the output of solar panels or wind turbines to charge energy storage batteries.
LM2596 Charge Module can charge almost any size of lithium-ion cell to almost any voltage you need. This is an inexpensive way to charge those 4.30v and 4.35v cells, as well as life and many other cells that require different termination voltages. It is also a good way to charge smaller cells since you can almost infinitely adjust the charging current and output voltage.

Features
- Non-isolated step-down constant current, constant voltage module (CC-CV charging module)
- Uses Readily Available Standard Inductors
- Thermal Shutdown and Current-limit Protection
- Create a Custom Design Using the LM2596
Pinout

Specifications
Input voltage | 7V to 35V. For best efficiency, the output voltage should be about 80% of the input voltage |
Output voltage | Continuously adjustable from 1.25V to 30V |
Minimum Voltage difference (input V – output V) | ~2V |
Maximum output current | 3A (more than 15W output, please install a heat sink) |
Constant current range | 0A to 3A (adjustable) |
Output power | 15W with natural cooling, 25W with heatsink |
Conversion efficiency | Up to 92% (Higher efficiency at higher output voltage) |
Full load temperature rise | 45 °C |
No-load Current | Typical 10mA (12V switch to 4.2V) |
Load regulation | ± 1% |
Voltage regulation | ± 0.5% |
Dynamic response speed | 5% 200uS |
Size | 47mm (L) * 23mm (W) * 14mm (H) mm |
Application
- High-power (up to 3A) LED or laser diode constant current driver
- Lithium battery charger
- 4V, 6V, 12V, 14V, or 24V nickel-cadmium or nickel-metal hydride battery charger
- High Conversion Efficiency When Used with Car 12V Battery Input
- Adjustable laboratory voltage source or current source
- Dimming Devices
- Regulate the Output of solar panels and wind turbines
Datasheet
Download the Datasheet of the LM2596 Power Supply Module from the link given below.