Enhanced LLC with Adaptive Dead Time and Capacitive Mode Protection

Upgrade to myMPS+


The HR1001 is an enhanced LLC controller which provides new features of adaptive dead time adjustment (ADTA) and capacitive mode protection (CMP). 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. HR1001 incorporates anti-capacitive mode protection which prevents potentially destructive capacitive mode switching if the output is shorted or has a severe over load. This feature protects the MOSFET during abnormal condition, making the converter robust. HR1001 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. HR1001 enters a controlled burst-mode operation at light-load to minimize the power consumption and tighten output regulation. HR1001 provides rich protection features which include two-level OCP with external latch shutdown, auto-recovery, brown in/out, CMP, and OTP, improving converter design safety with minimal extra components.


  • 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
  • SOIC-16 package


  • Vref (V)2
  • Vin (min) (V)8.9
  • Vin (max) (V)16.2
  • Iop (mA)3
  • Iq (mA)1.2
  • fsw (max) (kHz)600
  • Vbr (V)618
  • Vfb (V)2
  • Typical Pmax (W)600
  • Capacitive Mode Protection
  • Adaptive Dead Time Control
  • High-Voltage Start-UpNo
  • PackageSOIC-16
  • TypeResonant Controller
  • GradeCatalog
  • Control MethodAnalog
  • Power Range DefinedNo