CL1120 is an excellent performance of the primary side feedback controller, which integrates a variety of protection features. CL1120 minimize the number of system components and the use of SOT-23-6L package, which makes the CL1120 better used low-cost design. CL1120 has a low current start, current sampling LEB and internal slope compensation. Meanwhile, CL1120 with overvoltage protection function to prevent the circuit from being damaged in exceptional circumstances. Characteristics ◆ ± 3% constant accuracy, ± 3% current precision primary side feedback eliminates ◆ TL431 and optocoupler to reduce costs ◆ Low start-up current: 5μA (typ) ◆ Low operating current: 2mA (typ) ◆ Adjustable output constant voltage, constant current and peak current mode control power ◆ ◆ ◆ compensate for transformer inductance tolerances cable drop compensation ◆ Built-in frequency jitter technology to improve EMI ◆ Built-in soft-start function ◆ Built-edge blanking circuit (LEB) ◆ by-cycle current limit ◆ undervoltage protection (UVLO) ◆ VDD OVP protection ◆ VDD voltage clamp Applications 20W low power AC / DC off-line switching power supply is applied: ◆ phone / cordless phone charger digital camera battery charger ◆ ◆ Small Power Adapter ◆ PC / TV auxiliary power ◆ alternative linear power CL1120 uses SOT-23-6L package