HR1002 Enhanced LLC Controller with Robust Adaptive Dead-Time Adjustment DESCRIPTION FEATURES The HR1002 is an enhanced LLC controller that Over-Current Protection (OCP) with provides robust adaptive dead-time adjustment Configurable Delay for Enhanced Surge (ADTA) and capacitive mode protection (CMP), Performance as well as improved functional surge Adaptive Dead-Time Adjustment (ADTA) performance. Capacitive Mode Protection (CMP) 50% Duty Cycle, Variable Frequency ADTA automatically inserts a dead time Control for Resonant Half-Bridge Converter between the two complimentary gate outputs. 600V High-Side Gate Driver with Integrated This is ensured by keeping the outputs off while Bootstrap Diode, High-Accuracy Oscillator, sensing the dV/dt current of the half-bridge and High dV/dt Immunity switching node. ADTA simplifies the design and Operates Up to 600kHz provides lower EMI, as well as higher efficiency. Two-Level Over-Current Protection (OCP): The HR1002 incorporates capacitive mode Frequency Shift and Latched Shutdown with protection, which prevents potentially Configurable Duration destructive capacitive mode switching if the Latched Disable Input for Easy Protection output is shorted or is severely overloaded. This Remote On/Off Control and Brownout feature protects the MOSFET during abnormal Protection through BO conditions to provide a robust converter. Configurable Burst Mode Operation under The HR1002 has a configurable oscillator that Light-Load Conditions sets both the maximum and minimum switching Nonlinear Soft Start for Monotonic Output frequencies. To prevent excessive inrush Voltage Rising current, it starts up at a configured maximum Available in an SOIC-16 Package switching frequency and decays until the control APPLICATIONS loop takes over. LCD and PDP TVs The HR1002 enters a controlled burst mode Desktop PCs and Servers under light-load conditions to minimize power Telecom SMPSs consumption and tighten the output regulation. AC/DC Adapters, Open-Frame SMPS Full protection features include two-level over- Power Tools current protection (OCP) with external latched Video Game Consoles shutdown, auto-recovery, brown-in and Electronic Lighting Ballasts brownout, capacitive mode protection (CMP), and over-temperature protection (OTP). All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under The HR1002 requires minimal external Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. components, and is available in an SOIC-16 package. HR1002 Rev. 1.0 www.MonolithicPower.com 1 9/25/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. HR1002 ENHANCED LLC CONTROLLER TYPICAL APPLICATION BO V BUS VCC C BST SS BST 16 1 R SS HG S1 TIMER 2 15 L R CT SW 14 C 3 SS C T FSET NC 13 4 D1 Output HR1002 S2 R VCC FMAX BURST C HBVS 12 5 L M LG CS R FMIN 11 6 BO GND 7 10 HBVS VCC LATCH 9 8 C R D2 C S R S TL431 HR1002 Rev. 1.0 www.MonolithicPower.com 2 9/25/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved.