Augsta jauda blīvums, ātrs reakcija maksas kontrolēts komutācija barošana padeve vadība mikroshēma
SCM1725A mikroshēma is a augstas veiktspējas strāva režīms PWM kontrole mikroshēma, the mikroshēma iekšējais integrētais drenāža minimums izturēt spriegums of 650V 2A jauda caurule, augstspriegums start pin by tieši savienojums ar the power supply bus spriegums, to sasniegt ātra uzlāde of the VDD apvedceļš kondensators, at tas tas pats laiks, in mikroshēma to sākums īssavienojums aizsardzība, the VDD kondensators spriegums pilieni to punkts kur the VDD zemspriegums, augstspriegums ātrs starts ķēde At tas pats laiks, after the chip starts the short circuit protection, the VDD kondensators spriegums pilieni to the VDD undervoltage point, the high voltage fast start circuit restarts to charge the VDD bypass kondensators līdz tas sasniedz the VDD start voltage, the start circuit stop working to reduce the loss.
Sakarā ar the chip built-in light load frequency hopping mode, so that it has a very good efficiency performance at light loads, but also built-in duty cycle slope compensation, internal loop compensation and other circuits, so that the system loop operation is more stable. In order to improve system reliability, the chip also integrates a series of internal protection functions. In add, the chip integrates an EN pin, external logic high level, can control the chip into a very low power consumption mode, and at the same time make the VDD pin voltage is controlled at about 8.6V voltage. When the chip has enough heat dissipation conditions, in the open 75 degree environment 3S on/off intermittent operation, the maximum output peak power up to 20W.
