HR1001L
Enhanced LLC Controller with
Adaptive Dead-Time Control
HR1001L Rev.1.0 www.MonolithicPower.com 1
4/18/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
DESCRIPTION
The HR1001L is an enhanced LLC controller
that provides new, adaptive, dead-time
adjustment (ADTA) and capacitive mode
protection (CMP) features. The HR1001L is the
OCP latch-off version of the HR1001B.
ADTA inserts a dead time between the two
complimentary gate outputs automatically by
keeping the outputs off while sensing the dV/dt
current of the half-bridge switching node. ADTA
features an easier design, lower EMI, and
higher efficiency.
The HR1001L 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.
The HR1001L 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.
The HR1001L enters controlled burst mode at
light loads to minimize the power consumption
and tighten output regulation.
Full protection features include two-level over-
current protection (OCP), external-latch
shutdown, brown-in/brown-out, capacitive mode
protection (CMP), and over-temperature
protection (OTP).
FEATURES
Two-Level Over-Current Protection (OCP):
Frequency Shift and Latch-Off Mode
Adaptive Dead-Time Adjustment (ADTA)
Capacitive Mode Protection (CMP)
50% Duty Cycle, Variable Frequency
Control for Resonant Half-Bridge Converter
600V High-Side Gate Driver with Integrated
Bootstrap Diode with a High-Accuracy
Oscillator of High dV/dt Immunity
Operates up to 600kHz
Latched to 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
Available in a 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
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Assurance. “MPS” and “The Future of Analog IC Technology” are registered
trademarks of Monolithic Power Systems, Inc.