HR1002A Enhanced LLC Controller with Robust Adaptive Dead-Time Adjustment and Capacitive Mode Protection DESCRIPTION FEATURES The HR1002A is an enhanced LLC controller Over-Current Protection (OCP) with that provides robust adaptive dead-time Configurable Delay for Enhanced Surge adjustment (ADTA) and capacitive mode Performance protection (CMP), as well as improved Adaptive Dead-Time Adjustment (ADTA) functional surge 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 HR1002A 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 HR1002A 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 SOIC16-15 Package switching frequency and decays until the control APPLICATIONS loop takes over. LCD and PDP TVs The HR1002A 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 SMPSs 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 HR1002A 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 SOIC16-15 package. HR1002A Rev. 1.0 www.MonolithicPower.com 1 10/13/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. HR1002A ENHANCED LLC CONTROLLER WITH ADAPTIVE DEAD TIME TYPICAL APPLICATION BO V BUS VCC C BST SS BST 16 1 R SS TIMER HG S1 15 2 L R SW CT C 3 14 SS C T FSET 4 D1 Output HR1002A S2 R FMAX BURST VCC C HBVS 12 5 L M LG CS R FMIN 11 6 GND BO 10 7 VCC HBVS LATCH 8 9 C R D2 C S R S TL431 HR1002A Rev. 1.0 www.MonolithicPower.com 2 10/13/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved.