Hi Joseph,
Thank you for your interest in our product.
Here are two recommendations for you:
Part number: 091016
DROK® DC-DC Step-down Constant Current & Voltage Converter 4-38V to 1.25-36V 12V/24V Buck Voltage Regulator 5A 75W High Power LED Constant Current Driver Module for Lithium Battery Electromobile Charging
Parameter:
Frequency: 180KHz
Weight: about 25g
Input voltage: 4-38V
Output power: 75W(Max)
Transfer efficiency: 96%(Max)
Output current: adjustabel;5A(Max)
Input reverse connection protection: NO
Working temperature: -40 to +85 Celsius
Output voltage: 1.25-36V constantly adjustable
Short-circuit protection: YES(limited current of 8A)
Over-temperature protection: YES(item will stop output atomatically)

Note:
please strengthen cooling when buck converter module is used in more than 3A,35W

Product functions:
1.Work as high-power LED constant current driver module
2.Work as buck converter module with over-current protection
3.Charger of batteries(eg. nickel-cadimium or nickel-metal hydride battery, lithium batteries);can be used in solar panel/wind turbines/etc

Part number: 180051
DROK® Numerical Control Voltage Regulator DC 5-32V to 0-30V 5A Buck Converter, 24V 12V to 5V Step Down Power Converter Adjustable Digital Control Voltage Reducer with LED Ammeter Voltmeter Display
Technical Parameters:
Input Voltage Range: 5-32V (not to over 32V, or it will be damaged)
Output Voltage Range: 0-30.0V (step-down mode, the input must be at least 1V higher than output)
Output Power: 30W max
Output Current: 0-5A (if over 2A, should enhance heat dissipation)
Output Voltage Setting Resolution: 0.1V
Output Current Setting Resolution: 10mA
Power / Load Effect: CV < 20mV, CC < 30mA Voltage Measure Accuracy: ± (1% + 1 digits) Current Measure Accuracy: ± (1% + 2 digits) Dimensions: 75 * 43 * 12 mm Function Mode: 1, Setting Mode: In this mode, you can set the output current and voltage. Press the "SET" button, the digits on the screen will flash, then short press the "-" button to reduce the value, or short press the "+" button to increase the value and long pressing it, the value will increase rapidly. Press the "SET" button again to move to high-digit, move one digit with per pressing. When the setup is completed, press the "ON / OFF" button to determine the set data. At the same time, the system will save the set data to the chip's internal memory. It will also retain the set data when power-up again. 2, Working Mode: This mode is the normal operating mode, only in working mode, you can switch the input and output voltage display. 3, Automatically Output When Power On Function When power off, press ON/OFF button, then supply power to the module. At this time, the monitor will display "-F1-,-ON-", which means the module will output automatically when power on. With the same operation, if the monitor display "-F1-,-OFF-", which means the function, automatically output when power on, is turned off and you need to press the ON/OFF button if you want an output when power on. Hope this can help you. Best regards

Hello Alex,

Could you please tell us more details? For example, input voltage/current range and output  current range.