Description

The SCY99089DR2G is a high-performance switch-mode power supply controller designed for backlight and LLC converters. It is suitable for driving half-bridge topologies, such as lamp ballasts for backlighting applications or resonant converters like the LLC circuit. The controller offers adjustable switching frequencies, ranging from 30 kHz to 500 kHz, and includes various protections for a reliable and rugged converter.

Specifications and 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
• Pb-Free, Halogen Free/BFR Free, and RoHS compliant

Application Scenarios

• Flat panel display power converters
• LLC converters control for LCD/Plasma TVs
• HCFL / CCFL backlight inverters

Comparison

- High-frequency operation for improved efficiency

- Adjustable switching frequencies for versatile applications

- Various protection features for a reliable and rugged converter

- Suitable for driving half-bridge topologies

- Not suitable for other types of power supply topologies