DC Regulated Power Supplies Towards High Precision
DC Regulated Power Supply With the development of electronic equipment in the direction of high precision, high stability and high reliability, the power supply of electronic equipment puts forward high requirements.
Quality Indicators
(1)Voltage regulation rate SV.Voltage regulation rate is an important index to characterise the advantages and disadvantages of DC regulated power supply voltage regulation performance, also known as voltage regulation coefficient or stabilisation coefficient, which characterises the degree of stability of the output voltage VO of DC regulated power supply when the input voltage VI varies, and is usually expressed in terms of the percentage of the relative change of the input and output voltages per unit of the output voltage. Voltage regulation rate formula.
(2)Current adjustment rate SI.Current adjustment rate is a main self-indicator reflecting the load capacity of DC regulated power supply, also known as current stability coefficient. It characterises that when the input voltage is constant, the DC regulated power supply has the ability to suppress the fluctuation of the output voltage caused by the change of the load current (output current), under the condition of the specified load current change, the current adjustment rate of the DC regulated power supply is usually expressed as the percentage of the change of the output voltage value per unit of the output voltage. Current adjustment rate formula.
(3) Ripple rejection ratio SR. Ripple rejection ratio reflects the DC regulated power supply on the input side of the introduction of the utility voltage rejection ability, when the DC regulated power supply input and output bars DC regulated power supply components remain unchanged, the ripple rejection ratio is often expressed in terms of the ratio of input ripple voltage peak-peak to the peak-peak value of the output ripple voltage, generally expressed in decibels. Number of said, but sometimes can also be expressed as a percentage, or directly expressed in terms of the ratio of the two.
(4) temperature stability K. The temperature stability of the integrated DC regulated power supply is based on the specified DC regulated power supply operating temperature Ti * large changes in the range (Tmin ≤ Ti ≤ Tmax) DC regulated power supply output voltage of the relative change in the percentage value. Temperature stability formula.
