HF500-15
Fixed Frequency Multi-Mode
Flyback Regulator
Integrated with Highly Rugged MOSFET
HF500-15 Rev. 1.03 www.MonolithicPower.com 1
1/10/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2018 MPS. All Rights Reserved.
DESCRIPTION
The HF500-15 is a fixed-frequency, current-
mode regulator with built-in slope compensation.
It combines a 700V MOSFET of high avalanche
ruggedness and a full-featured controller into
one chip for a low-power, offline, flyback,
switch-mode power supply.
At medium and heavy loads, the regulator
works in a fixed frequency with frequency
jittering, which helps to spread energy out in a
conducted mode. During a light-load condition,
the regulator freezes the peak current and
reduces its switching frequency to f
OSC(min)
to
offer excellent efficiency at light load. At very
light loads, the regulator enters burst mode to
achieve low standby power consumption.
Full protection features include thermal
shutdown, brown-in and brownout, VCC under-
voltage lockout (UVLO), overload protection
(OLP), short-circuit protection (SCP), input and
output over-voltage protection (OVP), and over-
temperature protection (OTP) .
The HF500-15 features timer-based fault
detection and over-power compensation to
ensure that the overload is independent of the
input voltage.
The HF500-15 is available in a SOIC8-7B
package.
FEATURES
700V/4.5 Integrated MOSFET with high
single pulse avalanche energy
Fixed-Frequency Current-Mode-Control
Operation with Built-In Slope Compensation
Frequency Foldback Down to f
OSC(min)
at
Light Load
Burst Mode for Low Standby Power
Consumption
Frequency Jittering for a Reduced EMI
Signature
Over-Power Compensation
Internal High-Voltage Current Source
VCC Under-Voltage Lockout (UVLO) with
Hysteresis
Programmable Input B/O and OVP
Overload Protection (OLP) with a
Programmable Delay
Latch-Off Protection on TIMER
Thermal Shutdown (Auto-Restart with
Hysteresis)
Short-Circuit Protection (SCP)
Programmable Soft Start
APPLICATIONS
Power Supplies for Home Appliances
Set-Top Boxes
Standby and Auxiliary Power
Adapters
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” and “The Future of Analog IC Technology” are registered
trademarks of Monolithic Power Systems, Inc.
