L2269 Datasheet | LIZE

Description Current Mode PWM Controller Frequency Shuffling L2269 is highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyblack converter applications in sub 80W range. PWM switching frequency at normal operation is externally programmable to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss.Lower standby power and higher conversion efficiency in thus achieved. VDD low startup current and low operating current contribute to a reliable power on startup design with L2269.A large value resistor could thus be used in the startup circuit to minimize the standby power. L2269 offers plete protection coverage with automatic self- recovery feature including Cycle-by-Cycle current limiting (OCP), over temperature protection(OTP),VDD over voltage clamp and under voltage lockout (UV LO).The Gate output is clamped to maximum 18V to protect the power MOSFET. z z z z z z z z Leading edge Blanking on current sense input. Internal synchronized slope pensation . Extended burst mode control for improved efficiency and minimum standby power design Low VDD startup current and low operating current. Gate output maximum voltage clamp 18V. Cycle-by-Cycle Current Limiting, Built-in Adaptive Current Peak Regulation Power on Soft-start, Programmable CV and CC Regulation VDD Under Voltage Lockout with Hysteresis(UVLO),OVP,OCP,OLP, Clamp VDD, Applications z z z z z Digital Cameras Charger Power adaptor Set_top box power supplies Open_frame SMPS Battery charger Features z z Proprietary frequency shuffling technology for improved EMI performance. External programmable PWM switching frequency. reserves the right to change this documentation without prior notice Page 2 of 13 Shenzhen LIZE Electronic Technology Co., Ltd Application Circuit Current Mode PWM Controller Frequency Shuffling Pin Assignment & Marking Information Ordering...