DAP018B

Customer Specific Device from ON Semiconductor DAP018A/B/C/D/F PWM Current-Mode Controller for High-Power Universal Off-Line Supplies Auto−recovery internal output short−circuit protection for A, B, C and D versions. F is latched Adjustable Timer for Improved Short−circuit Protection OTP and OVP Inputs for Improved Robustness +500 mA / −800 mA Peak Current Capability Up to 28 V VCC Operation Improved Creepage Distance between High−voltage and Adjacent Pin Extremely Low No−load Standby Power This is a Pb−Free Device This Device uses Halogen−Free Molding Compound Housed in a SO−14 package, the DAP018X represents an enhanced version of the currently available Speedking controller, the DAP011. With an internal structure operating at a fixed 65 kHz or 100 kHz frequency, the controller directly connects to the high−voltage rail for a lossless and clean startup sequence. Current−mode control also provides an excellent input audio−susceptibility and inherent pulse−by−pulse control. Internal ramp compensation easily prevents sub−harmonic oscillations from taking place in continuous conduction mode designs. On top of these features, the device takes advantage of the auxiliary winding negative swing to let the user adjust the maximum power the converter can deliver in high line conditions (OPP). When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically freezes the peak current and reduces its switching frequency...