Product Summary

The 1203P60 is a PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Standby and Short Circuit Protection. The 1203P60 represents a major leap toward ultra-compact Switchmode Power Supplies and represents an excellent candidate to replace the UC384X devices. Due to its proprietary SMARTMOS Very High Voltage Technology, the circuit allows the implementation of complete off.line AC-DC adapters, battery charger and a high.power SMPS with few external components. With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz switching frequency, the controller features a high-voltage startup FET which ensures a clean and loss-less startup sequence. Its current.mode control naturally provides good audio.susceptibility and inherent pulse-by-pulse control. The applications of the 1203P60 include AC-DC Adapters for Notebooks, etc., Offline Battery Chargers, Auxiliary Power Supplies (USB, Appliances, TVs, etc.).

Parametrics

1203P60 absolute maximum ratings: (1)Power Supply Voltage VCC, Drv: 16 V; (2)Power Supply Voltage on all other pins except Pin 5 (Drv), Pin 6 (VCC) and Pin 8 (HV): 0.3 to 10 V; (3)Maximum Current into all pins except Pin 6 (VCC) and Pin 8 (HV) when 10 V ESD diodes are activated: 5.0 mA; (4)Thermal Resistance Junction.to.Air, PDIP-8 Version, RθJA: 100℃/W; (5)Thermal Resistance Junction.to.Air, SOIC Version, RθJA: 178℃/W; (6)Maximum Junction Temperature, TJMAX: 150℃; (7)Temperature Shutdown: 170℃; (8)Hysteresis in Shutdown: 30℃; (9)Storage Temperature Range: -60 to +150℃; (10)ESD Capability, HBM Model, All pins except Pin 6 (VCC) and Pin 8 (HV): 2.0 KV; ESD Capability, Machine Model: 200 V; (11)Maximum Voltage on Pin 6 (VCC) and Pin 8 (HV) Decoupled to Ground with 10μF: 450 V.

Features

1203P60 features: (1)Pb-Free Packages are Available; (2)High-Voltage Startup Current Source; (3)Auto-Recovery Internal Output Short-Circuit Protection; (4)Extremely Low No-Load Standby Power; (5)Current-Mode with Adjustable Skip-Cycle Capability; (6)Internal Leading Edge Blanking; (7)250 mA Peak Current Capability; (8)Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz; (9)Direct Optocoupler Connection; (10)Undervoltage Lockout at 7.8 V Typical; (11)SPICE Models Available for TRANsient and AC Analysis; (12)Pin to Pin Compatible with NCP1200.

Diagrams

1203P60 block diagram