Housed in SOIC−8 or PDIP−8 package, the NCP1200 represents a major leap toward ultra−compact Switchmode Power Supplies. Due to a novel concept, the circuit allows the implementation of a complete offline battery charger or a standby SMPS with few external components. Furthermore, an integrated output short−circuit protection lets the designer build an extremely low−cost AC−DC wall adapter associated with a simplified feedback scheme. With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz, the controller drives low gate−charge switching devices like an IGBT or a MOSFET thus requiring a very small operating power. Due to current−mode control, the NCP1200 drastically simplifies the design of reliable and cheap offline converters with extremely low acoustic generation and inherent pulse−by−pulse control.
Feature
- No auxiliary winding operation
- Internal output short-circuit protection
- Extremely low no-load standby power
- Current-mode with skip-cycle capability
- Internal leading edge blanking
- Direct opto coupler connection
- Built-in frequency jittering for lower EMI
- SPICE models available for transient and AC analysis
- Internal temperature shutdown
