NCP1207A

Product Summary

The NCP1207A is a PWM Current-Mode Controller for Free Running Quasi-Resonant Operation. The NCP1207A implements a standard current mode architecture where the switch off time is dictated by the peak current setpoint whereas the core reset detection triggers the turn on event. This component represents the ideal candidate where low part count is the key parameter, particularly in low cost AC/DC adapters, consumer electronics, auxiliary supplies, etc. Thanks to its high performance High Voltage technology, the NCP1207A incorporates all the necessary components/features needed to build a rugged and reliable Switch Mode Power Supply (SMPS).

Parametrics

NCP1207A absolute maximum ratings:(1)Power Supply Voltage, VCC, Drv: 16V; (2)Maximum Voltage on all other pins except Pin 8 (HV), Pin 6 (VCC) Pin 5 (Drv) and Pin 1 (Demag):0.3 to 10V; (3)Maximum Current into all pins except VCC (6), HV (8) and Demag (1) when 10 V ESD diodes are activated: 5.0mA; (4)Maximum Current in Pin 1, Idem: +3.0/2.0mA; (5)Thermal Resistance, Junction to Case, RθJC: 57℃/W; (6)Thermal Resistance, SOIC version, RθJA 178℃/W; (7)Thermal Resistance; Air, DIP8 version, RθJA 100℃/W; (8)Operating Junction Temperature, Tj: 40 to +125℃; (9)Maximum Junction Temperature, TJMAX: 150℃; (10)Temperature Shutdown: 155℃; (11)Hysteresis in Shutdown: 30℃; (12)Storage Temperature Range: 60 to +150℃; (13)ESD Capability, HBM Model (All pins except HV): 2.0kV; (14) ESD Capability, Machine Model: 200V; (15) Maximum Voltage on Pin 8 (HV), Pin 6 (VCC) decoupled to ground with 10μF, VHVMAX: 500V; (16) Minimum Voltage on Pin 8 (HV), Pin 6 (VCC) decoupled to ground with 10μF, VHVMIN: 40V.

Features

NCP1207A features:(1)Free Running Borderline/Critical Mode Quasi Resonant Operation; (2)Current Mode with Adjustable Skip Cycle Capability; (3)No Auxiliary Winding VCC Operation; (4)Auto Recovery Over current Protection; (5)Latching Overvoltage Protection; (6)External Latch Triggering, e.g. Via Over temperature Signal; (7)500mA Peak Current Source/Sink Capability; (8)Undervoltage Lockout for VCC Below 10 V; (9)Internal 1.0 ms Soft Start; (10)Internal 8.0us Minimum TOFF; (11)Adjustable Skip Level; (12)Internal Temperature Shutdown; (13)Direct Optocoupler Connection; (14)SPICE Models Available for TRANsient Analysis; (15)Pb-Free Package is Available.

Diagrams