CS51220

www.DataSheet4U.com CS51220 Feed Forward Voltage Mode PWM Controller with Programmable Synchronization CS51220 is a single output PWM Controller with switching frequency up to 500 kHz. The feed forward voltage mode control provides excellent line regulation for wide input range. This PWM controller has a synchronization output allowing programmable phase delay. For overcurrent protection, the “soft hiccup” technique effectively limits the output current with maximum flexibility. In addition, this device includes such features as: soft start, pulse−by−pulse current limit, programmable foldback current limit, volt−second clamping, maximum duty cycle, overvoltage and undervoltage protection, and synchronization input. The CS51220 is available in 16 SO narrow surface mount package. http://onsemi.com 16 1 SO−16 D SUFFIX CASE 751B Features Constant Frequency Feed Forward Voltage Mode Control Programmable Pulse by Pulse Overcurrent Limit Programmable Foldback Overcurrent Limit with Delay Soft Hiccup Overcurrent Protection with Programmable Foldback Frequency Synchronization Output with Programmable Phase Delay Synchronization Input to Higher or Lower Frequency Direct Connection to External Opto Isolators Logic Gate Output Signal Accurate Volt−Second Clamping Programmable Soft Start Logic Input to Disable IC Line Overvoltage and Undervoltage Monitoring 3.3 V 3% Reference Voltage Output PIN CONNECTIONS AND MARKING DIAGRAM VO GND VCC VREF ISET 1 CS51220...