Monolithic Power Systems

High-Performance Digital PFC + LLC Combo Controller


HR 1203
The HR1203 is a high-performance controller that integrates an advanced, digital, PFC controller and a half-bridge, LLC resonant controller. The HR1203 requires low input power at no-load or ultra-light load, making it compliant with the Energy Using Product Directive (EuP) Lot 6 and Code of Conduct Version 5 Tier 2 specifications.
High-Performance Digital PFC + LLC Combo Controller
hr1203_tac_1

Description

The HR1203 is a high-performance controller that integrates an advanced, digital, PFC controller and a half-bridge, LLC resonant controller. The HR1203 requires low input power at no-load or ultra-light load, making it compliant with the Energy Using Product Directive (EuP) Lot 6 and Code of Conduct Version 5 Tier 2 specifications.

The PFC of the HR1203 employs a patented average current control scheme, which can operate both in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) according to the instantaneous condition of the input voltage and output load. The IC exhibits excellent efficiency and high power factor (PF) at light load. The performance of the PFC can be optimized by programming multiple parameters through an I2C GUI. Programming can be completed either by the factory or by the customer referring to a detailed user guide.

The half-bridge LLC resonant converter achieves high efficiency with zero-voltage switching (ZVS). The HR1203 implements an adaptive dead-time adjustment (ADTA) function to guarantee ZVS in different load conditions. Additionally, the HR1203 can prevent the LLC converter from operating in capacitive mode, making it more robust and easier to design.

The HR1203 integrates a high-voltage (HV) current source internally for start-up. When the AC input is removed, the HV current source also functions as an X-cap discharger. Such features are helpful to reduce related devices, thus reduce power consumption at no load.

In order to improve the noise immunity, HR1203 implements multiple programmable digital filters on critical signals.
Full protection features include thermal shutdown, open-loop protection (OLP), over-current protection (OCP), over-voltage protection (OVP), and brown-in/-out protection.

 
Features & Benefits

General System Features
  • Meets EuP Lot 6 and COC Version 5 Tier 2 Specifications
  • HV Current Source for Start-Up
  • Smart X-Cap Discharger
  • Standard I2C Interface
  • 1k EEPROM to Store Parameters
  • User-Friendly GUI for Digital PFC

PFC Controller
  • High Efficiency from Light Load to Full Load by CCM/DCM Multi-Mode Control
  • High PF Due to Patented Input Capacitor Current Compensation
  • Programmable Filter for Noise Suppression
  • Programmable Frequency Jittering
  • Programmable Brown-In and Brown-Out
  • Programmable Soft Start (SS)
  • Cycle-by-Cycle Current Limit
  • Open-Loop Protection (OLP)

LLC Controller
  • 600V High-Side Gate Driver with Integrated Bootstrap Diode and High dV/dt Immunity
  • Adaptive Dead-Time Adjustment of HB LLC with Minimum and Maximum Limit
  • Burst Mode Switching
  • Safe Start-Up in Case of System Fault
  • Two-Level Over-Current Protection (OCP)
  • Latch Shutdown Protection
  • Over-Temperature Protection (OTP)
  • Capacitive Mode Protection

*MPS Authorized Distributor
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