SD6835 is current mode PWM+PFM controller used for SMPS with built-in high-voltage MOSFET and external sense resistor.
It features low standby power and low start current. In standby mode, the circuit enters burst mode to reduce the standby power dissipation.
The switch frequency is 25~67KHz decided by the load with jitter frequency for low EMI.
Built-in limit output power compensation circuit is used for balancing the limit output power under different AC voltage inputs. Built-in slope compensation circuit is used for adapting to more transformer applications. Maximum peak current compensation during power-on reduces pressure on transformer to avoid saturation, the peak current compensation will decrease for balance after power-on. Limit output current can be adjusted through the resistor connected to CS.
It integrates various protections such as undervoltage lockout, overvoltage protection, overload protection, leading edge blanking and thermal shutdown. The circuit will restart until normal if protection occurs.
Energy Star 2.0 standard
Lower start-up current
Various switching frequency following load for the high efficiency
EMI Frequency jitter for low EMI
Overvoltage, overload and over temperature protections
External peak current sense resistor
Limit output power compensation
Built-in high voltage MOSFET
Auto restart mode
Maximum peak current compensation for initialization to realize the soft start