HR1001C
Enhanced LLC Controller with
Adaptive Dead-Time Control,
Capacitive Mode Protection and
Enhanced Surge Protection
HR1001C Rev.1.0 www.MonolithicPower.com 1
2/6/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
DESCRIPTION
The HR1001C is an enhanced LLC controller
that provides adaptive dead-time adjustment
(ADTA) and capacitive mode protection (CMP)
features, as well as functional improvements on
surge performance.
ADTA 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. ADTA features easier design,
lower EMI, and higher efficiency.
The HR1001C 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 HR1001C 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 HR1001C enters a controlled burst mode
at light load to minimize power consumption
and tighten the output regulation.
Full protection features include two-level over-
current protection (OCP) with external latch
shutdown, auto-recovery, brown-in and brown-
out, capacitive mode protection (CMP), and
over-temperature protection (OTP), improving
converter design safety with minimal extra
components.
FEATURES
Over-Current Protection (OCP) with
Programmable Delay for Enhanced Surge
Performance
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
Two-Level Over-Current Protection (OCP):
Frequency Shift and Latched Shutdown with
Programmable Duration Time
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
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 Ballasts