HR1001 Enhanced LLC Controller SOIC

HR1001 Enhanced LLC Controller SOIC

The HR1001 is an enhanced LLC controller which provides new features of adaptive dead time adjustment (ADTA) and capacitive mode protection (CMP).

Key Specifications

Features

• Adaptive dead-time adjustment
• Capacitive mode protection
• 50% Duty Cycle, Variable Frequency Control For Resonant Half-Bridge Converter
• 600V High-Side Gate Driver with Integrated Bootstrap Diode with High dv/dt immunity High-Accuracy Oscillator
• Operates up to 600kHz
• Two-Level Over-Current Protection: Frequency-Shift and Latched Shutdown with Programmable Duration Time
• Latched Disable Input for Easy Protections
• Remote ON/OFF Control and Brown-Out Protection through the BO Pin
• Programmable Burst-Mode Operation at Light-Load
• Non-Linear Soft-Start for Monotonic Output Voltage Rise

Typical Application Circuit

Applications

• LCD and PDP TVs
• Desktop PCs and Servers
• Telecom SMPS
• AC-DC Adapter, Open-Frame SMPS
• Video Game Consoles

Design Notes

• The PFC inductor must support the maximum duty cycle at the lowest line voltage, which is where saturation risk peaks.
• High-voltage startup and X-capacitor discharge paths dominate no-load standby loss; verify them against the efficiency target.
• Leakage inductance and the RCD clamp set the turn-off loss — snubber values are a thermal trade-off, not a fixed recipe.
• Synchronous rectification timing must track the primary switching; a mistimed SR FET conducts through its body diode and fails hot.

Common Questions