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Numéro de référence | HR1000A | ||
Description | Resonant Half-Bridge Controller | ||
Fabricant | MPS | ||
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HR1000A
The Future of Analog IC Technology
DESCRIPTION
The HR1000A is a controller designed specifically
for the reso nant half-bridge topolog y. It provide s
two drive -signal channels t
hat output
complementary signals at a 50% d uty cycle. An
internal f ixed dead-time of 350n s between the
two complementary gate signa ls guarante es
zero-voltage switching during the transient an d
enables high-frequency operation.
The integra ted bootstr ap diode simplifies th e
external driving circuit fo r the high-side switch. It
can withsta nd up to 600V with immunity agai nst
high dV/dt noise.
Modulating the switching frequency r egulates the
topology output voltage. A programmable
oscillator can set bo th the maximu m and
minimum switching frequencies.
The IC starts up at the programmed ma ximum
switching frequency and gradually slows until t he
control loo p takes over to prevent excessive
inrush current
The IC can be forced to enter a con trolled burst-
mode operation at lig ht-load to minimize the
power consumption and tighten output regulation.
Protections features—including latched shutdown,
auto-recovery, brown-o ut protectio n, and over-
temperature protection—improve converte
r
design sa fety without engendering addition al
circuit complexity.
The IC provi de 1.5A/2A source/sink capability for
both high-side and low-side gate drivers.
The HR1000A is available in a SO-16 package.
Resonant Half-Bridge Controller
FEATURES
• 50% Duty Cycle, Variable Frequency
Control For Resonant Half-Bridge Converter
• 600V High-Side Gate Driver with Integrated
Bootstrap Diode and High dV/dt Immunity
• 1.5A/2A Source/Sink Capability for Both
High-Side and Low-Side Gate Drivers
• High-Accuracy Oscillator
• Operates at up to 600kHz
• Two-Level Over-Current Protection:
Frequency-Shift and Latched Shutdown with
Programmable Duration Time
• Remote ON/OFF Con trol and Brown-Out
Protection through the BO Pin
• Latched-Disable Input for Easy Pro tections
Implementation
• Interfaces with PFC Controller
• Programmable Burst-Mode Ope ration at
Light-Load
• Non-Linear Soft-Start for Monotonic Output
Voltage Rise
• SO-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 and adhere to the RoHS directive. For MPS green
status, please visit M PS website u nder Q uality Assurance. “MPS” and “ The
Future of An alog IC Technology” a re Re gistered T rademarks of Mo nolithic
Power Systems, Inc.
HR1000A Rev. 1.01
www.MonolithicPower.com
8/30/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
1
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Pages | Pages 23 | ||
Télécharger | [ HR1000A ] |
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