HR1001A
Enhanced LLC Controller with
Adaptive Dead-Time Control
HR1001A Rev.1.1 www.MonolithicPower.com 1
3/14/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
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.
FEATURES
• 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
APPLICATIONS
• LCD and PDP TVs
• Desktop PCs and Servers
• Telecom SMPS
• AC/DC Adapter, Open-Frame SMPS
• Video Game Consoles
• Electronic Lighting Ballast
All MPS parts are lead-free, halogen-free, and adhere to the RoS directive.
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Assurance. “MPS” and “The Future of Analog IC Technology” are registered
trademarks of Monolithic Power Systems, Inc.
