NCP1397ADR2G

The NCP1397 is a high performance controller that can be utilized in half bridge resonant topologies such as series resonant, parallel resonant and LLC resonant converters. It integrates 600 V gate drivers, simplifying layout and reducing external component count. With its unique architecture, including a 500 kHz Voltage Controlled Oscillator whose control mode permits flexibility when an ORing function is required, the NCP1397 delivers everything needed to build a reliable and rugged resonant mode power supply. The NCP1397 provides a suite of protection features with configurable settings to optimize any application. These include: auto−recovery or fault latch−off, brown−out, open optocoupler, soft−start and short−circuit protection. Deadtime is also adjustable to overcome shoot through current.

Applications

• Flat Panel Display Power Converters
• High Power ac−dc Adapters for Notebooks
• Computing Power Supplies
• Industrial and Medical Power Sources
• Offline Battery Chargers

Key features

• High−Frequency Operation from 50 kHz up to 500 kHz
• 600 V High−Voltage Floating Driver
• Adjustable Minimum Switching Frequency with ±3% Accuracy
• Adjustable Deadtime from 100 ns to 2 s
• Startup Sequence Via an Externally Adjustable Soft−Start
• Brown−Out Protection for a Simpler PFC Association
• Latched Input for Severe Fault Conditions, e.g. Over Temperature or OVP
• Timer−Based Input with Auto−Recovery Operation for Delayed Event Reaction
• Latched Overcurrent Protection
• Disable Input for Immediate Event Reaction or Simple ON/OFF Control
• VCC Operation up to 20 V
• Low Startup Current of 300 μA
• 1 A/0.5 A Peak Current Sink/Source Drive Capability
• Common Collector Optocoupler Connection for Easier ORing
• Optional Common Emitter Optocoupler Connection
• Internal Temperature Shutdown
• These Devices are Pb −Free, Halogen Free/BFR Free and are RoHS Compliant