Views: 0 Author: Site Editor Publish Time: 2024-06-27 Origin: Site
The role of DC-DC adapter is generally the role of power supply of transformer and rectifier.
What is the definition of DC-DC adapter?
What are the functions of the DC-DC adapter?
What are the parameters of the DC-DC adapter?
The DC-DC adapter is a laptop charger. The conventional laptop charger can only output a single voltage to charge a laptop type. This traditional laptop power supply is referred to in the industry as single band laptop charger.
The DC-DC adapter converts AC voltage through a transformer, aligning and filtering the rectifier circuit to obtain unstable DC voltage. To achieve high-precision DC voltage, the power supply must adjust the output voltage via a voltage feedback circuit. This kind of power supply technology is mature, the circuit is simple and there is no interference and noise that the switching power supply has.
(1) Voltage regulation coefficient (voltage regulation rate) SU: Under the condition that the load current and ambient temperature remain unchanged, the relative change of input voltage (10%) causes the relative change of output voltage. The smaller the SU value, the better the voltage control performance. the better.
(2) Internal resistance (output resistance) rn: When the load current changes, the output voltage of the power supply also changes, and the smaller the change, the better. The internal resistance is used to characterize the ability of the power supply to suppress changes in the load current. The internal resistance of the power supply is defined as the ratio of the output voltage change of the power supply to the output current change with unchanged input voltage. The smaller rn, the stronger the repressive capacity.
(3) Current control rate Sl: Current control rate refers to the percentage of relative change of output voltage when the load current changes from zero to maximum when the input voltage is constant. The smaller the Sl, the better the current control rate. . The size of the current control rate also reflects to some extent the size of the internal resistance, they all indicate the ability of the output voltage to remain stable when the load current changes. Therefore, in general, only one of the two is used, and the indicator of internal resistance is used on many occasions.
(4) Wave coefficient S0: There is a wave voltage in the output voltage of the power supply, which is the AC component contained in the output voltage. If the hum voltage is too high, this can lead to noise in the audio equipment and image distortion and rolling interference in the TV. The smaller the S0, the smaller the hum disturbance.
(5) Temperature coefficient Sr: The temperature coefficient is used to indicate the stability of the output voltage temperature. Under the condition that input voltage and output current remain unchanged, the ratio of the drift of the output voltage to the temperature change caused by the change in ambient temperature is called the temperature coefficient. The smaller it is, the more stable the power supply works.
HIENT Power Technology Co., Ltd. has been working for several years to meet the needs of customers from industrial production and commercial large-scale production.
HIENT Power Technology Co., Ltd. is the technology enterprises engaged in the development, design, manufacture and sale of power supply and power system.Power supply product includes adapter, charger, industry power... Read More
