Enhanced LLC Controller with Adaptive Dead Time Control

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Not Recommended for New Designs. Refer to HR1001B

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.

Symmetry Electronics is an authorized Monolithic Power Systems distributor.


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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


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Monolithic Power Systems Datasheet

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