HR1210 Multi-Mode PFC and Current Mode LLC Digital Combo Controller SOIC

HR1210 Multi-Mode PFC and Current Mode LLC Digital Combo Controller SOIC

The HR1210 is a multi-mode PFC and current mode LLC combo controller that is configurable through a UART interface.

Key Specifications

Features

• General System Features
• HV Current Source for Start-Up
• Smart X-Capacitor Discharges during AC Dropout, Approved by IEC62368 and IEC60950
• UART Interface to Configure Parameters
• User-Friendly GUI PFC Controller
• CCM/DCM Multi Mode PFC Control with High Efficiency from Light-Load to Full Load
• Operate up to 250kHz
• High PF from Input Capacitor Current Compensation
• Configurable Frequency Jittering
• Configurable Soft Start

Typical Application Circuit

Applications

• Desktop PCs and ATX Power Supplies
• All-in-One Gaming Power Supplies
• Notebook Adapters
• LCD TV and Plasma TV Power Supplies
• Power Tool 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