HR1002AGSE-P, Switching Voltage Regulators Enhanced LLC Controller with Robust Adaptive Dead-Time Adjustment and Capacitive Mode Protection

HR1002A is an enhanced LLC controller that provides robust adaptive dead-time adjustment (ADTA) and capacitive mode protection (CMP), as well as improved functional surge performance. ADTA automatically inserts a dead time between the two complimentary gate outputs. This is ensured by keeping the outputs off while sensing the dV/dt current of the half-bridge switching node. ADTA simplifies design and provides lower EMI, as well as higher efficiency. The HR1002A incorporates capacitive mode protection, which prevents potentially destructive capacitive mode switching if the output is shorted or is severely overloaded. This feature protects the MOSFET during abnormal conditions to provide a robust converter. The HR1002A has a configurable oscillator that sets both the maximum and minimum switching frequencies. Applications includes LCD and PDP TVs, desktop PCs and servers, telecom SMPSs, AC/DC adapters, open-frame SMPSs, power tools, video game consoles and electronic lighting ballasts.

• Overcurrent protection (OCP) with configurable delay for enhanced surge performance
• 50% duty cycle, variable frequency control for resonant half-bridge converter
• 600V high-side gate driver with integrated bootstrap diode, high accuracy oscillator
• High dV/dt immunity, operates up to 600KHz
• Two level overcurrent protection, frequency shift and latched shutdown with configurable duration
• Latched disable input for easy protection
• Remote on/off control and brownout protection through BO
• Configurable burst mode operation under light-load conditions
• Non-linear soft start for monotonic output voltage rising
• Auto-recovery, brown-in and brownout, capacitive mode protection and overtemperature protection