LLC with enhanced noiseproofing feature

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Product Description

The HR1001B is a noise-proof enhanced version of the HR1001, and it is pin-to-pin and BOM-to-BOM with the HR1001. The HR1001B is an enhanced LLC controller, which provides new adaptive dead-time adjustment (ADTA) and capacitive mode protection (CMP) features. The adaptive dead-time adjustment 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. The ADTA features easier design, lower EMI, and higher efficiency. The HR1001B incorporates anti-capacitive mode protection, which prevents potentially destructive capacitive mode switching if the output is shorted or has a severe overload. This feature protects the MOSFET during abnormal conditions, making the converter robust. The HR1001B has a programmable oscillator that sets both the maximum and minimum switching frequencies. It starts up at a programmed maximum switching frequency and decays until the control loop takes over to prevent excessive inrush current. The HR1001B enters a controlled burst mode at light load to minimize the power consumption and tighten output regulation. The HR1001B provides rich protection features, including two-level OCP with external latch shutdown, auto-recovery, brown in/out, CMP, and OTP, improving converter design safety with minimal extra components.

Product 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 Protection
  • 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
  • SOIC-16 Package


  • Vref (V)2
  • Vin (min) (V)8.9
  • Vin (max) (V)15.5
  • Iop (mA)3
  • Iq (mA)1.2
  • fsw (max) (kHz)600
  • Vbr (V)618
  • Vfb (V)2
  • Typical Pmax (W)400
  • mps_Status2
  • Mps StatusNew
  • TypeResonant Controller
  • GradeCatalog
  • Control MethodLLC/SRC
  • Power Range DefinedNo