FHB1.5A Series High Temperature Step Down Power Converter
■FHB1.5A series high-temperature step down power converter with input current of 1.5A is designed for electronic equipment working in the harsh environment. It can work for 1,000 hours at shell temperature 150 ℃, for 400 hours at shell temperature 175 ℃ and for 48 hours at shell temperature 204 ℃. With features of being resistant to high temperature,impact and humidity,it is a power supply system especially applicable to petroleum survey logging tool,petroleum drilling instrument,geophysical detecting instrument, vehicles, telecommunication, network infrastructures, enterprise and high-performance calculation.. Its input ranges from 7.0V to 20.0V. It provides non-isolated voltage-reduced single fix voltage or adjustable output voltage ranging 1.2V～7.0V/7.0V～18.0V. Within the entire temperature range and conversion between full load and no-load, the output voltage fluctuation is within 0.1V. The working frequency of FHB1.5A series power converter is up to 100KHz which provides good condition for filtering. In the circumstance of adding no filtering, its output voltage ripple is less than 50mV. The temperature stability of frequency within the entire range of temperature is ±8%.
■FHB1.5A is a step down power converter using DC-DC-BUCK circuit. When input voltage is greater than 7V, it starts to work. During operation, if input voltage is less than the preset output voltage, it becomes a series resistance with internal resistance of 0.4Ω. When power converter works steadily, the less the voltage difference of input and output voltage, the higher the conversion efficiency will be. The minimum voltage difference of input and output voltage is 0.4*IOUT (output current).
■FHB1.5A has output control end (ADJ)used to adjust output voltage. When ADJ connects resistance to output GND, the less the resistance is, the more the output will be; when ADJ connects the resistance to output, the less the resistance is, the less the output will be. To adjust the resistance, a 20K potentiometer is enough.
■FHB1.5A series power converter contains an in-built LC network, which can effectively reduce the fluctuations of the input current and the output voltage.
■FHB1.5A series power converter contains under-voltage cut-off function, which enables the converter to stop working beyond the range of the input voltage to protect the converter.
■FHB1.5A series power converter contains the output short circuit and overload automatic cut-off circuit. When the output lasts 0.1s and exceeds 120% of the rated output power, the module cuts off all outputs. After the over-current fault is eliminated, it automatically enters soft-start mode and restores the output voltage. If the overload duration of output is less than 01s, the module will not act.
■The operating frequency of FHB1.5A series power-supply converter is 100KHz, which provides a good condition for filtering. Under the circumstance without any filtering, its output voltage ripple is less than 50mV.
■Key components used for FHB1.5A series power-supply converter are purchased in military level and completely pass the in-factory test in strict accordance with the national military product quality standard. The factory test includes 24 ~ 72-hour live aging and screening under the temperature of +175℃. All finished products have experienced 8-hour full-load operation under the temperature of +185 ℃ before delivery so as to fully check the damage to the components during the production process and hence ensure the reliability of products.
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High Temperature Step Down Power Converter 、 High Temperature Step Down DC-DC Power Converters |
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[ petroleum prospecting logging tool ][ petroleum drilling instrument ][ geophysical detecting instrument ][ vehicles ][ telecommunication ][ network infrastructures ][ enterprise ][ high-performance calculation ][ electronic equipment ] |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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June 16,2022 |
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264 KB |
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