HR1211
Multi-Mode PFC and Current Mode
LLC Controller with Configurable Audible
Noise Reduction Control
o HV Current Source for Start-Up
o Smart X-Capacitor Discharge during AC
Dropout, Approved by IEC62368 and
IEC60950
o UART Interface for Configurations
o User-Friendly GUI for Digital PFC
DESCRIPTION
The HR1211 is a multi-mode PFC and current
mode LLC combo controller that is configurable
via UART interface. Power-saving technology
helps achieve optimized efficiency across the full
operating range.
PFC Controller:
The PFC controller employs a patented, digital
average current control scheme to achieve
hybrid CCM/DCM operation. Under heavy loads,
CCM reduces the peak MOSFET current so the
controller can be used across a wider load range.
Under light loads, DCM reduces the switching
frequency for better efficiency. Burst mode has
configurable, digital soft switching to improve
both light-load efficiency and audible noise.
o CCM/DCM Multi-Mode PFC Control with
High Efficiency across All Loads
o Operating Frequency Up to 250kHz
o High PF due to Input Capacitor Current
Compensation
o Configurable Frequency Jittering
o Configurable Soft Start and Burst On
o Configurable AC Input Brown-In/Out
o Cycle-by-Cycle Current Limiting
o OLP, OVP
Current mode control is implemented in the LLC
stage to achieve good stability and fast
response. Three operation modes are
implemented based on the different load
conditions: steady state, skip, and burst mode.
This allows different load conditions to be
independently optimized for efficiency. At light
loads, digital, frequency-controlled burst mode is
applied to reduce both switching power loss and
audible noise. Adaptive dead-time adjustment
(ADTA) and capacitive mode protection (CMP) is
also applied to guarantee zero-voltage switching
(ZVS) without capacitive mode operation.
LLC Controller:
o 600V High Side Gate Driver with
Bootstrap Diode and High dV/dt
Immunity
o Current Mode Control
o Up to 500kHz in Steady State
o Adaptive Dead-Time Adjustment with
Minimum and Maximum Limit
o Burst/Skip Mode Switching at Light Load
o Configurable Burst Frequency with Low
Audible Noise
o Configurable Soft Start
o Configurable DC Input Brown In/Out
o Capacitive Mode Protection
o OCP, OPP with Auto-Restart or Latch
o Configurable Protection on SO Pin
The HR1211 has an internal, high-voltage
current source for start-up, meaning that a
traditional start-up resistor or external circuit is
not required. The high-voltage (HV) current
source can be implemented as an X-capacitor
discharger when the AC input is in dropout, so a
capacitor resistor is not required.
APPLICATIONS
Desktop PCs and ATX Power Supplies
All-in-One and Gaming Power Supplies
Notebook Adapters
LCD TV and Plasma TV Power Supplies
Power Tools Power Supply LED Drivers
Protections include thermal shutdown (TSD),
PFC open-loop protection (OLP), over-voltage
protection (OVP), over-current limit (OCL) and
LLC over-current protection (OCP), SO pin
protection, and over-power protection (OPP).
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.
For MPS green status, please visit the MPS website under Quality
Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
The HR1211 is available in SOIC-20 and
TSSOP-20 packages.
FEATURES
General System Features:
HR1211 Rev. 1.0
1/4/2021
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
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