1基本說明
1 basic description
XP258是非隔離24V轉5V電源卡，主要用于大容積率產品中；支持在JX-300XP機柜機籠中的冗余配置。該卡件采用寬、窄兩種面板設計，以滿足各種槽位對卡件面板的不同需求。
Xp258 is a non isolated 24V to 5V power card, which is mainly used in products with large plot ratio; Support redundant configuration in JX-300XP cabinet cage. The card adopts wide and narrow panel design to meet the different needs of various slots for the card panel.
電源卡具備的功能：輸出過流保護功能；輸出端過、欠壓檢測功能；輸入端過、欠壓檢測功能；輸入過流保護功能；輸入欠壓鎖定功能。
Functions of the power card: output overcurrent protection function; Output overvoltage and undervoltage detection function; Input overvoltage and undervoltage detection function; Input overcurrent protection function; Input undervoltage locking function.
2性能指標
2 performance index
功能要求
Functional requirements
電壓范圍：22V～26V
Voltage range: 22V ~ 26V
輸入電壓紋波/躁聲 lt;200/400mvp-p
Input voltage ripple / noise lt; 200/400mvp-p
電壓范圍：5.2V～5.6V
Voltage range: 5.2v ~ 5.6v
輸出電壓紋波/躁聲 lt;100/200mvp-p
Output voltage ripple / noise lt; 100/200mvp-p
輸出電流3.5A
Output current 3.5A
轉換效率負載大于50%時，>70%
Conversion efficiency > 70% when the load is greater than 50%
熱插拔具備整體抗瞬間電流和電壓沖擊功能
Hot plug has the overall function of resisting transient current and voltage shock
保護具備輸出過流保護功能，保護電流<4a具備輸入過流保護功能，保護電流<3a
The protection has output overcurrent protection function, protection current < 4a, input overcurrent protection function, protection current < 3a
性能要求
performance requirement
線性調節率輸入電壓從到，<0.5%
Linear regulation rate input voltage from to, < 0.5%
負載調節率負載從10%到，<8%
Load regulation rate from 10% to, < 8%
EMC配合系統，整體達工業三級指標
EMC cooperates with the system and reaches the industrial level III index as a whole
工作溫度（0～50）℃
Operating temperature (0 ~ 50) ℃
工作濕度5%～95%RH，無凝露
Working humidity 5% ~ 95% RH, no condensation
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