충전 작동 중에 온도가 너무 높을 경우 기존 제품의 과열 보호는 온도가 냉각될 때까지 출력 전력을 완전히 차단한다. 업그레이드 된 UHP-1000/1500/2500 & PHP-3500은 PC 기능과 함께 작동할 때 자동 출력 전력 감소가 발생하므로(실제 부하사용이 줄어들어 발열량이 줄어들게 되므로) 제품 신뢰성이 효과적으로 향상되고, 장비 작동을 유지하기 위해 배터리를 더 느린 속도로 충전할 수 있도록 업그레이드 되었다.
업그레이드는 2019년 11월 6일부터 UHP-1000/1500/2500의 신제품으로 이행되었으며 PHP-3500은 이미 해당 업그레이드 기능이 내장되어있다.(프로덕션 로트: W1912A)
The conduction-cooled UHP family is MEAN WELL new generation of industrial control power supply, and its unique fanless design has been well received by the market since release. UHP family 1000W and above products (UHP-1000/1500/2500 & PHP-3500) come with the Programmable Current (PC) function, which allows the output current to be modulated between 20%~100% by applying an external 1~5VDC control signal. One common application for the PC function is charging application. Customers can use the PC function to control charge rate of batteries. During the charging operation, if the temperature is too high, traditional over temperature protection will shut-off the output power completely until temperature cools down. The upgraded UHP-1000/1500/2500 & PHP-3500 will have automatic output power de-rating when operated with the PC function, which will effectively improve product reliability and still charge the batteries at a slower rate to maintain equipment operation.
Figure 1 shows the new de-rating curve added to the UHP-1000 specification sheet. When the power supply is operating under PC mode and full load conditions, the output current will de-rate to 50% when the operating temperature exceeds the maximum ambient temperature. If the temperature continues to rise, then the output will shut-off until the power supply is cool enough to be re-powered on. Figure 2 is the new de-rating curve of UHP-1500/2500 & PHP-3500, which is slightly different from the UHP-1000 automatic de-rating curve. Firstly, the automatic de-rating will activate when either PC function or communication protocol is utilized. Secondly, there will be de-rating of 10%/℃ when temperature rises from T1 to T2.