EPM0510SJ

Voltage - Output 3:	--
Size / Dimension:	1.30" L x 1.22" W x 0.81" H (33.0mm x 31.0mm x 20.7mm)
Package / Case:	14-DIP Module, 9 Leads
Mounting Type:	Through Hole
Efficiency:	70%
Operating Temperature:	-20°C ~ 80°C
Features:	OCP, OTP, OVP
Applications:	ITE (Commercial)
Voltage - Isolation:	3kV
Power (Watts):	5W
Current - Output (Max):	1A
Series:	--
Voltage - Output 2:	--
Voltage - Output 1:	5V
Voltage - Input (Max):	450V
Voltage - Input (Min):	110V
Number of Outputs:	1
Type:	Isolated Module
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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DC DC Converters

DC-DC converters are devices which convert power from one voltage level to another. This is commonly achieved through the use of a transformer, not to be confused with a DC-AC converter which would be used to convert DC power to AC power. DC-DC converters are very important in applications where the voltage level must be controlled, such as in aerospace, industrial automation, automotive, renewable energy, and wireless communication. In this article, we will discuss the application field and working principle of EPM0510SJ, a DC-DC converter from Texas Instruments.

EPM0510SJ Application Field

EPM0510SJ is a high-efficiency non-synchronous buck converter with integrated Schottky diode. This device is especially suited for providing low voltage supplies from higher voltage input sources. Typical design applications include fixed-frequency, pre-regulators for high voltage DC distribution systems, point-of-load converters for DSPs and microprocessor based systems, and low voltage level shifters.

EPM0510SJ Key Features

This device follows a few key features:

• Input voltage range between 3.3 to 20 volts
• Output Current up to 5A
• Adjustable drop out voltage
• Power-good output
• Integrated low resistance Schottky diode
• Programmable switching frequency up to 1.2 MHz
• Voltage mode control (constant VOUT)
• Current mode control (constant IOUT)
• Four optional operating modes
• Integrated over-temperature protection
• Low Shutdown currents

Working Principle of EPM0510SJ

EPM0510SJ works on the principle of buck topology. It is designed primarily for essential step-down voltage conversion. The core element of this conversion is a switch that regulates the power drawn from the input voltage source, which is connected through a power capacitor. The output voltage is thus determined by the duty cycle of the switch and the voltage of the input source. This device mainly comprises of a power MOSFET, an input capacitor Ci, an output capacitor Co, and a diode as shown in the schematic. During the ON time of the MOSFET, the current flows from the input voltage source towards the output load. The voltage is regulated by controlling the on/off duty cycle of the MOSFET. During the off-time, the current stored in the input capacitor and output capacitor flows through internal Schottky diode back to the output load.The EPM0510SJ operating frequency can be programmed to maximize the efficiency and regulation. The frequency is adjusted by the onboard oscillator connected to the external programming resistor. It also features an adjustable Soft-Start circuit and a fault timer for protection against conditions such as short circuits and over-currents.

Conclusion

In conclusion, EPM0510SJ is a high-efficiency DC-DC converter from Texas Instruments which follows the buck topology for voltage conversion. It is especially suited for providing low voltage supplies from higher voltage input sources. This converter is especially suited in designs where space is a constraint and power levels need to be regulated. Moreover, EPM0510SJ works on the principle of Pulse-Width Modulation for voltage conversion. Its integrated Schottky diode, adjustable drop out voltage, adjustable switching frequency, power-good output, and protection circuits make it a suitable choice for low voltage level shifting and point-of-load conversions.

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