DC-DC Buck Converter, 48V to 13.8V/36V

This series of DC-DC buck converters with synchronous rectification technology is designed to step down the input rated voltage 48V DC to 13.8V or 36V DC output voltage, and different models for your applications.

Features

• Wide input voltage range: 30V to 60V or 40V to 60V.
• Brand-new, die-cast aluminum shell and high quality design, maximum transfer efficiency of 92.2%.
• This DC step down module comes with waterproof lever of IP68, moisture-proof & anti-shock protection.
• Auto-recovery when the device is back to normal operating.
• Built-in full protection against over/under voltage input, over-current, overload, overhead, over-temperature and short circuit.
• Industry grade DC 48V to 13.8V/ 36V buck converter, widely used in automotive, electricity, surveillance systems, railway signals, instruments, solar generates electricity, display screen of bus and taxi, car audio device, security systems, hospital equipment, telecommunications etc.

5A DC-DC Buck Converter Specification

48V to 13.8V DC-DC Buck Converter Model Selection

Code	Model	Price	Input Voltage	Output Voltage	Output Current	Output Power	Efficiency	Size	Download
1	ATOWG-48S13R805	$55.39	48V DC	13.8V DC	5 Amps	69 Watts	92.2%	64*57*22mm
2	ATOWG-48S13R810	$58.79	48V DC	13.8V DC	10 Amps	138 Watts	93.7%	64*57*22mm
3	ATOWG-48S13R815	$60.39	48V DC	13.8V DC	15 Amps	207 Watts	95.8%	74*74*32mm
4	ATOWG-48S13R820	$61.59	48V DC	13.8V DC	20 Amps	276 Watts	95%	74*74*32mm
5	ATOWG-48S13R830	$77.79	48V DC	13.8V DC	30 Amps	414 Watts	95.3%	100*80*39mm
6	ATOWG-48S13R850M	$136.69	48V DC	13.8V DC	50 Amps	690 Watts	97%	100*80*36mm
7	ATOWG-48S13R860M	$144.69	48V DC	13.8V DC	60 Amps	828 Watts	96.5%	100*80*36mm

48V to 36V DC-DC Buck Converter Model Selection

Note: The series of 48V to 13.8V/ 36V DC-DC buck converter models are all here, check the parameter carefully from the table and select the right converter power supply when place the order.

13.8 volts DC Power Supply Applications

ATO DC-DC buck converter can step down 24V/48V DC voltage to 13.8V. 13.8V DC power supply is mainly used in vehicle charging systems, communication equipment, emergency backup power supply and other fields. Here are some specific applications:

• Car charging system: The vehicle's charging system usually converts AC power into 13.8V DC voltage, which is used to charge the vehicle battery. This voltage value is to ensure that the battery can maintain good condition when charging and not overcharge.
• Communications equipment: Many radio communications equipment and radio stations require 13.8V DC power to operate. These devices include amateur radio stations and professional communications equipment, and using this standard voltage ensures stable operation of the equipment.
• Backup power supply for electronic equipment: Some electronic equipment, such as radios, communication equipment and emergency lighting, often use 13.8V DC power supply as a backup power supply. Backup power ensures equipment remains operational in the event of a primary power failure, especially during emergencies.
• Fire alarm: Some fire alarm systems may require a 13.8V DC power supply to ensure that the system can continue to work during a power outage or other emergency, providing continuous safety monitoring.
• Ship and aircraft equipment: Some electronic equipment and communication equipment on ships and aircraft also use 13.8V DC power supply. These equipment include navigation systems, communication equipment and various control systems. Using this voltage can ensure the reliability and stability of the equipment.

Tips: Where are DC-DC converters used?

DC-DC converters are widely used in various applications to efficiently convert one direct current (DC) voltage level to another. They play a crucial role in modern electronics and power management systems. Common applications include:

• Power Supplies: DC-DC converters are integral in many electronic devices, such as laptops and smartphones, to regulate the voltage supplied to sensitive components.
• Renewable Energy: They are used in solar power systems to convert variable DC voltages from solar panels into stable outputs for grid connection or battery charging.
• Automotive: In electric and hybrid vehicles, DC-DC converters transform high-voltage battery power to lower voltages for vehicle subsystems.
• Telecommunications: They help maintain stable voltage levels in cell towers, data centers, and telecom equipment, ensuring uninterrupted communication.
• Industrial Control: DC-DC converters are used in automation, robotics, and process control systems to power sensors, controllers, and actuators.
• Aerospace and Defense: They provide regulated power for avionics, radar, and missile systems, where reliability is critical.
• Medical Devices: DC-DC converters ensure precise and stable power supplies for medical equipment like MRI machines and pacemakers.

DC-DC converters offer flexibility, efficiency, and voltage regulation in diverse applications, making them indispensable in modern technology.

Tips: What components are the main losses in a buck converter?

The losses in buck converters are mainly concentrated in several key components, including switches, diodes, inductors and capacitors. The switch tube will produce conduction and cut-off losses when it is turned on and off, which depends on the voltage and current when the switch tube is turned on and off. Conduction losses due to the forward voltage drop of the diode are also an important factor, especially in traditional non-synchronous buck converters. Inductors will produce certain losses when converting magnetic energy into electrical energy, mainly caused by the DC resistance and AC resistance of the inductor. Capacitor loss is mainly due to the equivalent series resistance and dielectric loss of the capacitor.