• SF5545 is a high performance, high efficiency, low cost, highly integrated current mode PWM controller  for offline flyback converter applications. jMJ嘉泰姆




•    PWM switching frequency with shuffling is externally programmable, which can reduce conduction EMI emission of a power supply. 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.jMJ嘉泰姆




•    SF5545 can achieve "Zero OCP/OPP Recovery Gap" using SiFirst's proprietary control algorithm. SF5545 also has built in proprietary "Audio Noise Free OCP Compensation",which can achieve constant power limiting and can achieve audio niose operation at heavy loading when line input is around 90VAC .  jMJ嘉泰姆




•    SF5545 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). jMJ嘉泰姆




•    SF5545 is available in SOT23-6, DIP-8 packages.jMJ嘉泰姆

jMJ嘉泰姆

jMJ嘉泰姆

jMJ嘉泰姆