CS5106 Datasheet | Cherry Semiconductor Corporation

Feature , Synchronous plus Auxiliary PWM Controller Description The CS5106 is a fixed frequency, current mode controller with one single NFET driver and one dual FET, synchronous driver. The synchronous driver allows for increased efficiency of the main isolated power stage and the single driver allows the designer to develop auxiliary supplies for controller power as well as secondary side house keeping. In addition, because the synchronous drivers have programmable FET non-overlap, the CS5106 is an ideal controller for soft-switched converter topologies. The CS5106 is specifically designed for isolated topologies where speed, flexibility, reduced size and reduced ponent count are requirements. The controller contains the following features : Undervoltage Shutdown, Overvoltage Shutdown, Programmable Frequency, Programmable Synchronous Non Overlap Time, Master/Slave Clocking with Frequency Range Detection, Enable, Output Undervoltage Protection with Timer, 20m A 5V Output, 80ns PWM propagation delay, and Controlled Hiccup Mode. The CS5106 has junction temperature and supply ranges of -40ûC to 125ûC and 9V to 16V respectively and is available in the 24 lead SSOP package. Features s Programmable Fixed Frequency s Programmable FET Nonoverlap s Enable Lead s 12V Fixed Auxiliary Supply Control s Under and Overvoltage Shutdown s Output Undervoltage Protection with Timer s Master/Slave Clock Syncing Capability s Sync Frequency Range Detection s 80ns PWM Propagation Delay s 20m A 5V Reference Output s Small 24 lead SSOP Package s Controlled Hiccup Mode Applications Diagram 48V to 3.3V Forward Converter with Synchronous Rectifiers VIN R27 R1 VAUXP R3 R2 R4 C3 SYNCIN ENABLE V5REF UVSD ENABLE PROGRAM OVSD V5REF SYNC IN SYNC OUT OAM OAOUT FADJ OUVDELAY DLYSET ILIM2 ILIM1 RAMP2 RAMP1 VFB1 VFB2 VSS GATE2B VCC GATE2 VDD GATE1 SYNCOUT C6 R24 D8 R25 R14 C8 R13 R9 T4 CNY17-4 C1 C2 D5 R7 R20 R15 R16 C14 R17 C13 R18 Package Options 24 Lead SSOP UVSD VAUXP D1 T1 C4 TL431...