HFC0300
Variable Off Time Controller
The Future of Analog IC Technology
DESCRIPTION
HFC0300 is a variable off-time controller that
uses a fixed-peak–current technique to
decrease its frequency as the load lightens. As
a result, it offers excellent efficiency at light-load
while optimizing the efficiency under other load
conditions.
When the frequency decreases to threshold,
the peak current decreases with the decreasing
load to prevent mechanical resonance in the
transformer. The controller enters burst mode
when the output power falls below a given level.
The HFC0300 features various protections such
as thermal shutdown, V
CC
under-voltage lockout,
overload protection, short-circuit protection, and
over-voltage protection.
The HFC0300 is available in SOIC-7 package.
FEATURES
Variable Off-Time, Current Mode Control
Universal Main Supply Operation (85VAC to
265VAC)
Frequency Foldback as Load Lightens
Peak-Current Compression to Reduce
Transformer Noise
Active-Burst Mode for Low Standby Power
Consumption
Internal High-Voltage Current Source
Internal 200ns Leading Edge Blanking
Thermal Shutdown (Auto Restart with
Hysteresis)
VCC Under-Voltage Lockout with Hysteresis
Over-Voltage Protection on VCC Pin
Timer-Based Overload Protection
Short-Circuit Protection
Natural Spectrum Shaping for Improved
EMI Performance
Battery Charger for Portable Electronics
Standby Power Supply
Switched-Mode Power Supplies
APPLICATIONS
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“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
HFC0300 Rev. 1.0
9/23/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
1
HFC0300– VARIABLE OFF TIME CONTROLLER
TYPICAL APPLICAION
T1
*
Input
85Vac - 265Vac
*
Output
*
HV
8
1
2
DRV
CS
GND
COMP
VCC
FSET
6
5
3
4
HFC0300
HFC0300 Rev. 1.0
9/23/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
2
HFC0300– VARIABLE OFF TIME CONTROLLER
ORDERING INFORMATION
Part Number*
HFC0300HS
Package
SOIC-7
Top Marking
HFC0300
Free Air Temperature (T
A
)
-40°C to +125°C
For Tape & Reel, add suffix –Z (e.g. HFC0300HS–Z);
For RoHS compliant packaging, add suffix –LF (e.g. HFC0300HS–LF–Z)
PACKAGE REFERENCE
TOP VIEW
DRV
CS
GND
COPM
1
2
3
4
6
5
VCC
FSET
8
HV
SOIC-7
ABSOLUTE MAXIMUM RATINGS
(1)
Thermal Resistance
(4)
θ
JA
θ
JC
HV Breakdown Voltage .............. -0.7V to +700V
VCC, DRV to GND ........................-0.3V to +30V
DRV to GND .................................-0.3V to +18V
FSET, COMP, CS to GND ..............-0.3V to +7V
(2)
Continuous Power Dissipation (T
A
= +25°C)
SOIC-7……………………………………....1.3W
Junction Temperature ...............................150°C
Thermal Shut Down ..................................150°C
Thermal Shut Down Hysteresis ..................25°C
Lead Temperature ....................................260°C
Storage Temperature .............. -60°C to +150°C
ESD Capability Human Body Model (All Pins
except Drain) ........................................... 2.0kV
ESD Capability Machine Model ................. 200V
Recommended Operation Conditions
(3)
Maximum Junction Temp. (T
J
) ............... +125°C
Operating Vcc range ........................ 8.2V to 20V
SOIC-7 .................................... 96 ...... 45 ... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T
J
(MAX), the junction-to-
ambient thermal resistance
θ
JA
, and the ambient temperature
T
A
. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by P
D
(MAX) = (T
J
(MAX)-T
A
)/θ
JA
. Exceeding the maximum allowable power
dissipation will cause excessive die temperature, and the
regulator will go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7, 4-layer PCB.
HFC0300 Rev. 1.0
9/23/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
3
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Monolithic Power Systems (MPS)
:
HFC0300HS-LF HFC0300HS-LF-Z
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