Enhanced LLC Controller with Adaptive Dead-Time Control

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Product Information

HR1001A is the OCP auto-recovery version of HR1001B.

HR1001A 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 inserts a dead time between the two complimentary gate outputs automatically. 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.

HR1001A 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.

HR1001A 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.

HR1001A enters a controlled burst mode at light load to minimize the power consumption and tighten output regulation.

HR1001A provides rich protection features, including two-level OCP, auto—recovery, external latch shutdown, brown in/out, CMP, and OTP, improving converter design safety with minimal extra components.

Symmetry Electronics is an authorized Monolithic Power Systems distributor.


Two-Level Over-Current Protection: Frequency Shift and Auto-Recovery Mode with Programmable Duration Time
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
Latched Disable Input for Easy Protection
Remote On/Off Control and Brown-Out Protection through BO
Programmable Burst Mode Operation at Light Load
Non-Linear Soft Start for Monotonic Output Voltage Rise
SOIC-16 Package


Monolithic Power Systems Datasheet

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