NCP1051 Datasheet | onsemi

features an active startup regulator circuit that eliminates the need for an auxiliary bias winding on the converter transformer, fault detector and a programmable timer for converter overload protection, unique gated oscillator configuration for extremely fast loop response with double pulse suppression, power switch current limiting, input undervoltage lockout with hysteresis, thermal shutdown, and auto restart fault detection. These devices are available in economical 8- pin dual- in- line and 4- pin SOT- 223 packages. Features - Startup Circuit Eliminates the Need for Transformer Auxiliary Bias Winding - Optional Auxiliary Bias Winding Override for Lowest Standby Power Applications - Converter Output Overload and Open Loop Protection - Auto Restart Fault Protection - IC Thermal Fault Protection - Unique, Dual Edge, Gated Oscillator Configuration for Extremely Fast Loop Response - Oscillator Frequency Dithering with Controlled Slew Rate Driver for Reduced EMI - Low Power Consumption Allowing European Blue Angel pliance - On- Chip 700 V Power Switch Circuit and Active Startup Circuit - Rectified AC Line Source Operation from 85 V to 265 V - Input Undervoltage Lockout with Hysteresis - Oscillator Frequency Options of 44 k Hz, 100 k Hz, 136 k Hz - These are Pb- Free and Halide- Free Devices Typical Applications - AC- DC Converters - Wall Adapters - Portable Electronic Chargers - Low Power Standby and Keep- Alive Supplies .onsemi. MARKING DIAGRAMS PDIP- 8 NCP105XZ P SUFFIX CASE 626A YYWWG 1 Pin: 1. 2. Control Input 3, 7- 8. Ground 4. No...