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Trimming The Output Voltage Of DC/DC Converters
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Trimming The Output Voltage Of DC/DC Converters
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From Beta Dyne Inc.
The simplest and least expensive solution is to connect a resistor from the VOUT Adjust pin to the minus (-) reference point or to the plus (+) reference point (positive point where the feedback RF resistor is connected. When a variable voltage source, such as a digital-to-analog converter (D/A) or OPAM, must be used for adjustment, the circuit in Figure 2 can be used. The circuit in Figure 1 is a variable current source that can be used to perform a ±10% adjustment of the converter’s output voltage. The auxiliary output is preloaded by RLF and an overvoltage zener diode to prevent any overvoltage condition in case the external load is not installed or disconnected. The converter in Figure 4 is the same converter given in Figures 3A, 3B and 3C with one exception: it incorporates output synchronous rectification for its main output. The converter in Figure 4 does not need a preload for its main output due to the fact that the loop is energized by the switching loss in the MOSFETs.
Products & Services
AC to DC converter chips transfer an AC input into DC power using switching (MOSFET, IGBT) or rectification (diodes, Schottky diodes).
DC-DC converter chips provide a regulated DC voltage output from a different, unregulated input voltage.
DC to AC converter chips transfer a DC input into AC power by using switching, inversion, or other technology.
DC-DC converters accept DC input and provide regulated and/or isolated DC output in various applications including computer flash memory, telecommunications equipment, and process control systems.
Frequency-to-voltage converter chips provide an analog voltage output as a function of the input signal frequency.
Product Announcements
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The "E" Series of high-voltage, regulated DC-DC converters addresses the needs of the precision high-voltage-power supply user. The "E" Series is designed and built utilizing state-of-the-art power...
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The WPC Series of converters is essentially a full wave DC power supply capable of operating at low voltage DC. The output may be filtered using a capacitor internal in the converter/charger.
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The "AA" Series of high-voltage regulated DC-DC converters addresses the needs of the miniature PCB-mount regulated high voltage power supply user. Designed and built utilizing state of the art power...
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The "A" Series of high-voltage regulated DC-DC high-voltage power supplies address the needs of the miniature PCB-mount, regulated high-voltage-power-supply user. Designed and built utilizing state of...
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The "C" Series of high-voltage regulated DC-DC converters are designed for fast-rise-time/charging applications utilizing state-of-the-art power conversion topology. Surface mount technology and...
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The model VTC615R 19" Rackmount Voltage Converter supplies either 12V, 24V, or 48 VDC from a 24V, or 48VDC power source.
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From Digi-Key, the LT3080 is a 1.1A low dropout linear regulator that can be paralleled to increase output current or spread heat in surface mounted boards.
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Solid State Power Source/Frequency Converter with variable output. Allows adjustment of output voltage and frequency over a wide range. Available in sizes from 500W to 320KVA.
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Behlman Electronics Inc., known for its leadership in providing power products for aviation, industrial, commercial and military applications, has received customer acceptance for the modified Behlman...
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Topics of Interest
When the output voltage (VO) of a DC/DC converter must be adjusted in an application, the manufacturer usually specifies the output adjustable voltage range of the converter, typically 5% to 10%. The...
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The industry drive toward smaller, lighter and more efficient electronics has led to the development of the Switch Mode Power Supply (SMPS). There are several topologies commonly used to implement...
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Referring to the output stage diagram (Figure 1), note that - VOUT (Pin 7) is connected to the system ground and the load is connected between +VOUT (Pin 5) and -VOUT (Pin 7). Also note that VOUT/2...
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For non-isolated switching voltage regulators (SVR or SR), such as our SRAD20 series, the feedback control of the PWM is used to adjust the output voltage of the regulator. The PWM voltage reference...
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Switching noise generated from a DC/DC converter appears at both the input and output terminals. The parasitic capacitance of the power transformer, printed circuit board (PCB) and case will couple...
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