Current - Output (Max):	250mA, 250mA
Size / Dimension:	1.25" L x 0.80" W x 0.40" H (31.8mm x 20.3mm x 10.2mm)
Package / Case:	24-DIP Module, 6 Leads
Mounting Type:	Through Hole
Efficiency:	88%
Operating Temperature:	-40°C ~ 105°C
Features:	Remote On/Off, OCP, OVP, SCP, UVLO
Applications:	ITE (Commercial), Medical
Voltage - Isolation:	5.0kV
Power (Watts):	6W
Series:	REM6
Voltage - Output 3:	--
Voltage - Output 2:	-12V
Voltage - Output 1:	12V
Voltage - Input (Max):	75V
Voltage - Input (Min):	18V
Number of Outputs:	2
Type:	Isolated Module
Part Status:	Active
Packaging:	Tube

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DC DC Converters

DC-DC converters represent a unique and important converter type found in many applications, including automotive, industrial, aerospace and power system applications. DC-DC converters use an electrical process known as ‘rectification’ to convert direct current (DC) to a variable or adjustable voltage DC power supply. The REM6-4812DW/A is a high frequency AC/DC step down power supply module, with a maximum output power of 600 Watts, and an operating temperature range of -40°C to +85°C. The REM6-4812DW/A has an input voltage of 236 – 530Vac, and a range of output voltages of 12Vdc to 48Vdc, with a maximum efficiency of 89%. It features active current and temperature protection, as well as overload, short circuit, overvoltage and undervoltage protection. It is compliant to UL and EN60950-1, and has an approving certification for ROHS and CE. The application field of the REM6-4812DW/A varies depending on the individual design capabilities and typical uses include power supplies where a high efficiency, high power density and excellent output voltage stability are required. Typical applications may include industrial control, Uninterruptible Power Supply (UPS) systems, LED lighting control, security systems and automotive electronics. The working principle of the REM6-4812DW/A relies on the most common topology of DC/DC converters, which is the buck-boost converter. The buck-boost converter contains a pair of DC/DC switches, a buck transistor and a boost transistor, each of which controls the output voltage level. The input voltage to the REM6-4812DW/A is rectified by a power rectifier, controlled by a current regulator. This rectifier converts the AC power into pulsing DC power. This pulsing DC is then routed to the DC/DC switching elements, which govern the output voltage with high speed switching. The switching elements are driven by the control circuitry which is responsible for maintaining the output voltage at the desired level. For example, if the load on the output needs to be increased, the switch will reduce its conduction period to increase the level of current delivered to the load. This in turn lets the control circuit reduce the frequency in an effort to limit excessive current. The output voltage is set by adjusting the duty cycle (on/off time ratio) of the DC/DC switch. The output voltage is checked by comparing the reference voltage with an internal comparator, and the duty cycle is then adjusted until the two voltages are matched.The operation of the REM6-4812DW/A can be considered quite efficient and reliable due to the low power losses and high power handling capabilities, which enable it to be used in a wide range of applications. This makes the REM6-4812DW/A an ideal choice for a variety of DC/DC power supply applications.

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