High Performance Switch-Mode Power Supply Controller for Backlight and LLC Converters

The DDA002C controller hosts a high performance circuitry dedicated to driving half−bridge topologies, such as lamp ballasts for backlighting applications or resonant converters like the LLC circuit. The controller includes everything needed to build a reliable and rugged converter, including a pre−heating period and various protections such as an adjustable brown−out, for instance. Both, minimum and maximum switching frequencies, are adjustable by single pull down resistor, offering the ability to operate between 30 kHz and 500 kHz.

FEATUREs
• High−Frequency Operation from 30 kHz up to 500 kHz
• Selectable Minimum Switching Frequency
• Adjustable Deadtime from 100 ns to 2 s
• 100 ms Delayed Startup for PFC Stage Stabilization
• Adjustable Preheating Timer via External Capacitor
• Startup Sequence via Adjustable Soft−Start
• 600 V High−Voltage Floating Drivers
• Synchronized Low−Current Outputs for Full Bridge Applications
• Adjustable Maximum On−Time Clamp for Synchronization Outputs
• Brown−Out Protection for Easier PFC Association
• Delayed Open−Loop Protection
• Latched Input for Severe Fault Conditions, e.g. Over Current
• Secondary Latched Input for Over Temperature Protection
• Auto−Recovery Enable Input
• VCC Operation up to 20 V
• Low Startup Current of 300 A
• 0.5 A / 0.25 A Peak Current Sink / Source Drive Capability, Respectively
• Internal Temperature Shutdown
• SO19W package
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

Typical Applications
• Flat Panel Display Power Converters
• LLC Converters Control for LCD/Plasma TVs
• HCFL / CCFL Backlight Inverters