NCP4330

NCP4330 Post Regulation Driver The NCP4330 houses a dual MOSFET driver intended to be used as a companion chip in AC−DC or DC−DC multi−output post regulated power supplies. Being directly fed by the secondary AC signal, the device keeps power dissipation to the lowest while reducing the surrounding part count. Furthermore, the implementation of a N−channel MOSFET gives NCP4330−based applications a significant advantage in terms of efficiency. Features Undervoltage Lockout Thermal Shutdown for Overtemperature Protection PWM Operation Synchronized to the Converter Frequency High Gate Drive Capability Bootstrap for N−MOSFET High−Side Drive Over−Lap Management for Soft Switching High Efficiency Post−Regulation Ideal for Frequencies up to 400 kHz This is a Pb−Free Device http://onsemi.com MARKING DIAGRAM 8 1 SO−8 D SUFFIX CASE 751 8 4330D ALYW G 1 4330D = Device Number A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package Typical Applications ATX 3V3 Post−Regulation Offline SMPS with MAGAMP Post−Regulation Multi−Outputs DC−DC Converters VDD RST Vref, UVDth VDD Band−Gap AR2 VDD Undervoltage Detection (UVD high if VDD < 4.9 V) UVD HS_DRV and LS_DRV low RESET Block Level Shifter Buffer U1 INVERTER BST HS_DRV PIN CONNECTIONS HS_DRV 1 BST 2 RST 3 C_ramp 4 8 GND 7 LS_DRV 6 VDD 5 I_ramp (Top View) ORDERING INFORMATION Device Package Shipping† C_ramp I_ramp Iramp 2.5 V/1.5 V U4 + U3 Iramp - OR Hysteresis VD...