SF1585 is a high performance, cost efficiency, high efficiency, low cost, highly integrated current mode PWM controller  for offline flyback converter applications. NXK嘉泰姆

   In SF1585，PWM switching frequency with shuffling is fixd to 65KHz and is trimmed to tight range. When the output power demands decrease, the IC automatically decreases switching frequency based on the proprietary η-BalanceTM control to boost Power conversion efficiency at the light load. When the current set-point falls below a given value, e.g. the output power demand diminishes, the IC enters into burst mode and provides excellent efficiency without audio noise.NXK嘉泰姆

  SF1585 can achieve "Zero OCP/OPP Recovery Gap" using SiFirst's proprietary control algorithm. It also has built in proprietary "Audio Niose Free OCP Compensation",which can achieve constant power limiting and can achieve audio noise operation at heavy loading when line input is around 90VAC.  NXK嘉泰姆

   SF1585 integrates functions and protections of Under Voltage Lockout (UVLO),  VCC Over Voltage Protection (OVP), Cycle-by-cycle Current Limiting (OCP), All  Pins Floating Protection, Over Load Protection (OLP), RT Pin Short-to-GND  Protection, Gate Clamping, VCC Clamping, Leading Edge Blanking (LEB). NXK嘉泰姆

   SF1585 is available in SOT23-6, DIP-8 packages.NXK嘉泰姆