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 to 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
Benefits
Adjustable minimum switching frequency with 3% accuracy (improved Fmax of 6%)
Keeps the converter operation in the right region & simplifies design
Brown-out input
Simple PFC association
1 A / 0.5 A Peak Current Sink / Source Drive
High gate drive capability
Timer-based OCP input with auto-recovery
Allows transient overload, protects against overpower
Second latched OCP level
Protects application in case of short circuit
Adjustable deadtime from 100 ns to 2 us
Prevents shoot-through currents and allows for optimization based on MOSFET characteristics
Adjustable soft-start
Reduces startup currents
Designed with Pin-to-Adjacent-Pin Short Testing Safety Considerations
Enhanced reliability and safety
Designed with Open Pin Testing Safety Considerations
Enhanced reliability and safety
Applications
End Products
High Efficiency 90W~500W Power Supplies
LCD-TV
LED Lighting Systems
All-in-One Computer, Desktop, Server Power Supplies
Home and Industrial Appliances
Medium- and high-power small size notebook adapters
