SD6834 SD 6834 Dip-8 PWM PFM SMPS Controller Integrated Mosfet DIP-8

SD686X  is  current mode  PWM+PFM  controller  with  built-in  high-voltage MOSFET used for SWPS,with low standby power and lowstart current for power switch. In standby mode, the circuit entersburst  mode  to  reduce  the  standby  power  dissipation.The  switchfrequency is 25~67KHz with jitter frequency for low EMI.Built-in  peak  current  compensation  circuitmakes  the  limit  outputpower  stable  even  with  different  input  AC  voltage.  Limit  outputpower can be adjusted through the resistor. Maximum peak currentcompensation during power-on reduces pressure on transformer toavoid saturation, the peak  current compensation  will  decrease  forbalance after power-on.It  integratesvarious  protections  such  as  undervoltage  lockout,overvoltage  protection,  overload  protection,  lead  edge  blanking,primary winding overcurrent protection and thermal shutdown. Thecircuit will restart until normal if protection occurs

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