HR1213 Multi-Mode PFC and Current Mode LLC Combo Controller Supporting both SOIC

HR1213 Multi-Mode PFC and Current Mode LLC Combo Controller Supporting both SOIC

The HR1213 is a multi-mode PFC and current mode LLC combo controller that can be configured via the UART interface.

Key Specifications

Features

• General System Features: o High-Voltage Current Source for Start- Up o UART Interface for Configurations o User-Friendly GUI o Available in SOIC-20 and TSSOP-20 Packages

Applications

• Desktop PCs and ATX Power Supplies
• All-in-One and Gaming Power Supplies
• Notebook Adapters
• TV Power Supplies
• Power Tools Power Supplies

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