High Performance Resonant Mode Controller with Integrated High-Voltage Drivers

The NCP1398 is a high performance controller for half bridge LLC resonant converters. The integrated high voltage gate driver simplifies layout and reduces external component count. A unique architecture, which includes a 750 kHz Voltage Controlled Oscillator whose control mode permits flexibility when an ORing function is required allows the NCP1398 to deliver everything needed to build a reliable and rugged resonant mode power supply. The NCP1398 provides a suite of protection features with configurable settings allow optimization in any application. This includes: auto−recovery and latch−off over−current protection, brown−out detection, open optocoupler detection, adjustable soft−start and dead−time.

FEATUREs
• High−Frequency Operation from 50 kHz up to 750 kHz
• Adjustable Minimum Switching Frequency with ± 3% Accuracy
• Adjustable Dead−Time
• Startup Sequence Via an Externally Adjustable Soft−Start
• Precise and High Impedance Brown−Out Protection
• Latched Input for Severe Fault Conditions, e.g. Over Temperature or OVP
• Timer−Based Auto−Recovery Overcurrent Protection
• Latched Output Short−Circuit Protection
• Open Feedback Loop Protection for NCP1398B Version
• Disable Input for ON/OFF Control
• Skip Mode with Adjustable Hysteresis
• VCC Operation up to 20 V
• 1 A / 0.5 A Peak Current Sink / Source Drive Capability
• Common Collector Optocoupler Connection for Easier ORing
• Internal Temperature Shutdown
• Designed with Pin−to−Adjacent−Pin Short Testing Safety Considerations
• Designed with Open Pin Testing Safety Considerations
• These Devices are Pb−Free and Halogen Free/BFR Free

Typical Applications
• Flat panel Display Power Converters
• High Power AC/DC Adapters
• Computing Power Supplies
• Industrial and Medical Power Sources
• Offline Battery Chargers