HFC0500
Fixed Frequency Flyback Controller
with Ultra-low No Load Power Consumption
The Future of Analog IC Technology
DESCRIPTION
FEATURES
HFC0500 is a fixed-frequency current-mode
controller with internal slope compensation. It is
specifically designed for the medium-power, offline, flyback, switch-mode power supplies.
HFC0500 is a green-mode highly efficient
controller. At light loads, the controller freezes
the peak current and reduces its switching
frequency down to 25kHz to offer excellent
light-load efficiency. At very light loads, the
controller enters burst mode to achieve very low
standby power consumption.
HFC0500 offers frequency jittering to help
dissipate energy generated by conducted noise.
HFC0500 employs overpower compensation
function to narrow the difference of over power
protection point between low line and high line.
HFC0500 also has X-cap discharge function to
discharge the X-cap when the input is
unplugged. This aids in lowering no load power.
HFC0500 features multiple protections that
include thermal shutdown (TSD), VCC undervoltage lockout (UVLO), overload protection
(OLP), over-voltage protection (OVP), and
brown-out protection.
HFC0500 is available in an SOIC8-7A package.
Fixed-frequency current-mode control with
internal slope compensation
Frequency foldback down to 25kHz at light
loads
Burst mode for low standby power
consumption, meeting EuP Lot 6
Frequency jitter to reduce EMI signature
X-cap discharge function
Adjustable overpower compensation
Internal high-voltage current source
VCC under-voltage lockout with hysteresis
(UVLO)
Brown-out protection on HV
Overload protection with programmable
delay
Thermal shutdown (auto-restart with
hysteresis)
Latch-off for external over-voltage protection
(OVP) and over-temperature protection
(OTP) on TIMER
Latch-off for Vcc over voltage protection
Short-circuit protection
Programmable soft start
APPLICATIONS
AC/DC power for small and large
appliances
AC/DC adapters for notebook computers,
tablets, and smart phones
Offline battery chargers
LCD TVs and monitors
All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For
MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
HFC0500 Rev. 1.1
5/10/2019
www.MonolithicPower.com
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© 2019 MPS. All Rights Reserved.
1
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
TYPICAL APPLICATION
T1
Output
*
Input
85~ 265 Vac
*
*
TIMER
FB
CS
GND
1
8
HV
2
3
6
4
5
VCC
DRV
HFC0500
HFC0500 Rev. 1.1
5/10/2019
www.MonolithicPower.com
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© 2019 MPS. All Rights Reserved.
2
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
ORDERING INFORMATION
Part Number*
HFC0500GS
Package
SOIC8-7A
Top Marking
See Below
* For Tape & Reel, add suffix –Z (e.g. HFC0500GS–Z);
TOP MARKING
HFC0500: first seven digits of the part number;
LLLLLLLL: lot number;
MPS: MPS prefix:
Y: year code;
WW: week code:
PACKAGE REFERENCE
TOP VIEW
HFC0500 Rev. 1.1
5/10/2019
TIMER
1
8
HV
FB
2
CS
3
6
VCC
GND
4
5
DRV
www.MonolithicPower.com
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3
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
ABSOLUTE MAXIMUM RATINGS (1)
Thermal Resistance (4)
HV ............................................... -0.7V to 700V
VCC, DRV to GND ............................ -0.3V to 30V
FB, TIMER, CS to GND .................... -0.3V to 7V
Continuous Power Dissipation (TA = +25°C) (2)
............................................................... 1.3W
Junction Temperature ............................... 150°C
Lead Temperature .................................... 260°C
Storage Temperature ...............-60°C to +150°C
ESD Capability Human Body Model (except HV
and DRV) .................................................. 4.0kV
ESD Capability Human Body Model (DRV) 3.5kV
ESD Capability Human Body Model (HV) 1.8kV
ESD capability for Machine Mode .............. 400V
SOIC8-7A ................................ 96 ...... 45... °C/W
θJA
θJC
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD (MAX) = (TJ
(MAX)-TA)/θJA. 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.
Recommended Operation Conditions (3)
Operating Junction Temp (TJ) ..-40°C to +125°C
Operating VCC range ........................... 9V to 24V
HFC0500 Rev. 1.1
5/10/2019
www.MonolithicPower.com
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© 2019 MPS. All Rights Reserved.
4
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
ELECTRICAL CHARACTERICS
VCC=18V, TJ=-40°C ~ 125°C, Min & Max are guaranteed by characterization, typical is tested
under 25℃, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
2.8
5
Unit
Start-up Current Source (HV)
IHV_400
VCC= 12V,
VHV=400V
1.5
IHV_120
VCC= 12V,
VHV=120V
1.5
2.7
5
ILK_400
VCC increases to
18V then decreases
to 14V, VHV=400V
1
16
25
μA
ILK_200
VCC increases to
18V then decreases
to 14V, VHV=200V
1
13
22
μA
700
790
Supply Current from HV
Leakage Current from HV
Break Down Voltage
VBR
TJ = 25oC
mA
V
Supply Voltage Management (VCC)
VCC Increasing Level at which the
Current Source Turns-Off
VCCOFF
12.5
15.5
18
V
VCC Decreasing Level above which Soft
Start Takes Place if HV>HVON
VCCSS
10.5
12
13
V
VCCOFF VCCSS
1.35
3.5
VCCON
7.3
8.5
VCC UVLO Hysteresis
VCCOFF VCCON
5
7
VCC Re-charge Level when Protection
Takes Place
VCCPRO
4.9
5.5
VCC Decreasing Level at which the Latch
off Phase Ends
VCCLATCH
VCC Hysteresis for Brown-in Detection
VCC Decreasing Level at which the
Current Source Turns-On
V
9.6
V
V
6.2
2.5
V
V
ICC
VFB=2V,CL=1nF,
VCC=12V
1.1
1.8
2.7
mA
Internal IC Consumption, Latch off Phase
ICCLATCH
VCC=VCCOFF-1V,
TJ=25℃
520
700
880
μA
Voltage on the VCC above which the
Controller Latches off (OVP)
VOVP
24
26.5
28.5
V
Blanking
Duration
Comparator
TOVP
Internal IC Consumption
HFC0500 Rev. 1.1
5/10/2019
on
the
OVP
60
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μs
5
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
ELECTRICAL CHARACTERICS (continued)
VCC=18V, TJ=-40°C ~125°C, Min & Max are guaranteed by characterization, typical is tested under
25℃, unless otherwise specified.
Parameter
Symbol
Conditions
HV Turn on Threshold Voltage
HVON
VHV
up,TJ=25℃
going
HV Turn off Threshold Voltage
HVOFF
VHV going
TJ=25℃
down,
Min
Typ
Max
Unit
95
107
119
V
86
97
110
V
10
12.5
V
Brown-out
Brown-out Hysteresis
HV
TJ=25℃
7.5
Timer Duration for Line Cycle Drop-out
THV
CTIMER=47nF
40
Oscillator Frequency
fOSC
VFB>1.85V,TJ=25℃
62
65
68
kHz
Frequency Jittering Amplitude,
in Percentage of fOSC
Ajitter
VFB>1.85V,TJ=25℃
5
6.5
8.3
%
Frequency jittering entry level
VFB_JITTER
1.95
V
ms
Oscillator
Frequency Jittering Modulation Period
Tjitter
CTIMER=47nF
3.7
ms
Current Sense
Current Limit Point
VILIM
0.93
1
1.07
V
Short Circuit Protection Point
VSCP
1.3
1.47
1.63
V
Current limitation when frequency
foldback
VFOLD
VFB=1.85V
0.63
0.68
0.73
V
Current limitation when entry Burst
VIBURL
VFB=0.7V
0.11
V
Current limitation when leave Burst
VIBURH
VFB=0.8V
0.15
V
Leading Edge Blanking for VILIM
TLEB1
350
ns
Leading Edge Blanking for VSCP
TLEB2
270
ns
Slope of the Compensation Ramp
SRAMP
18
25
32
mV/μs
Internal Pull-up Resistor
RFB
11.5
14
16.5
kΩ
Internal Pull-up Voltage
VDD
VFB to Internal Current Setpoint Division
Ratio
KFB1
VFB=2V
2.55
2.8
3.05
--
VFB to Internal Current Setpoint Division
Ratio
KFB2
VFB=3V
2.8
3.1
3.4
--
FB Decreasing Level at
which the
Controller Enters the Burst Mode
VBURL
0.63
0.7
0.77
V
FB Increasing Level at
which the
Controller Leaves the Burst Mode
VBURH
0.72
0.8
0.88
V
Feedback (FB )
HFC0500 Rev. 1.1
5/10/2019
4.3
www.MonolithicPower.com
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V
6
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
ELECTRICAL CHARACTERICS (continued)
VCC=18V, TJ=-40°C ~125°C, Min & Max are guaranteed by characterization, typical is tested under
25℃, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Over Load Protection
FB Level at which the Controller Enters
the OLP after a Dedicated time
VOLP
Time Duration before OLP when FB
Reaches Protection Point
TOLP
3.7
CTIMER=47nF
V
40
ms
Over Power Compensation
VHV to IOPC Ratio
KOPC
Current out of CS
IOPC
0.45
VHV=120V,VFB=2.5V
0
VHV=155V,VFB=2.5V
13
VHV=310V,VFB=2.5V
85
VHV=380V,VFB=2.5V
, TJ=25℃
FB Voltage below which Compensation is
Removed
VOPC(OFF)
FB Voltage above which Compensation
is Applied Fully
VOPC(ON)
90
119
μA/V
μA
148
0.55
V
2.2
V
Frequency Foldback
FB Voltage Threshold below
Frequency Foldback Starts
which
Minimum Switching Frequency
FB Voltage Threshold below
Frequency Foldback Ends
FOSC(min)
which
1.8
VFB(FOLD)
TJ=25℃
21
25
V
30
1.0
VFB(FOLDE)
kHz
V
Latch-off Input(Integration in TIMER)
The Threshold below which Controller is
Latched
Blanking Duration on Latch Detection
HFC0500 Rev. 1.1
5/10/2019
VTIMER(LATC
H)
TLATCH
0.7
1
12
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1.3
V
μs
7
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
ELECTRICAL CHARACTERICS (continued)
VCC=18V, TJ=-40°C~125°C, Min & Max are guaranteed by characterization, typical is tested under
25℃, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
DRV Voltage
Driver Voltage High Level
VHigh
CL=1nF,VCC=12V
10.3
V
Driver Voltage Clamp Level
VClamp
CL=1nF,VCC=24V
13.4
V
Driver Voltage Low Level
VLow
CL=1nF,VCC=24V
16
mV
Driver Voltage Rise Time
TR
CL=1nF,VCC=16V
13
ns
Driver Voltage Fall Time
TF
CL=1nF,VCC=16V
23
ns
Driver Pull-up Resistance
RPull-up
CL=1nF,VCC=16V
8
RPull-down
CL=1nF,VCC=16V
10
Thermal Shutdown Threshold (5)
150
℃
Thermal Shutdown Hysteresis (5)
25
℃
Driver Pull-down Resistance
Thermal Shutdown
Notes:
5) This parameter is guaranteed by design.
HFC0500 Rev. 1.1
5/10/2019
www.MonolithicPower.com
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© 2019 MPS. All Rights Reserved.
8
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
PIN FUNCTIONS
Pin #
Name
1
TIMER
2
FB
3
CS
4
5
6
8
GND
DRV
VCC
HV
HFC0500 Rev. 1.1
5/10/2019
Description
Timer. This pin combines the soft start, frequency jittering, along with the timer functions for
OLP, brown-out protection, and X-cap discharge. The IC can be latched off by pulling this
pin low.
Feedback. Use a pull-down opto-coupler to control output regulation.
Current Sense. Senses the primary side current for current-mode operation, and provides a
means for over power compensation adjustment.
IC Ground.
Drive Signal Output.
Power Supply.
High-Voltage Current Source. Includes brown-out and X-cap discharge functions.
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9
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
TYPICAL CHARACTERISTICS
HFC0500 Rev. 1.1
5/10/2019
www.MonolithicPower.com
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© 2019 MPS. All Rights Reserved.
10
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
TYPICAL CHARACTERISTICS (continued)
HFC0500 Rev. 1.1
5/10/2019
www.MonolithicPower.com
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© 2019 MPS. All Rights Reserved.
11
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
TYPICAL CHARACTERISTICS (continued)
HFC0500 Rev. 1.1
5/10/2019
www.MonolithicPower.com
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12
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
TYPICAL PERFORMANCE CHARACTERISIC
VIN=230VAC, VOUT=19V, IOUT=2.35A, unless otherwise noted.
VBUS
100V/div.
VCC
5V/div.
VOUT
5V/div.
VBUS
100V/div.
VCC
5V/div.
VOUT
5V/div.
VOUT
100mV/div.
VCC
5V/div.
VFB
1V/div.
VCC
5V/div.
VFB
1V/div.
VCC
5V/div.
VFB
1V/div.
VDS
100V/div.
IOUT
10A/div.
VDS
100V/div.
IOUT
10A/div.
VDS
100V/div.
IOUT
10A/div.
VFB
2V/div.
VCC
5V/div.
IOUT
2A/div.
VFB
2V/div.
VCC
5V/div.
IOUT
2A/div.
VDS
100V/div.
VDS
100V/div.
HFC0500 Rev. 1.1
5/10/2019
VFB
2V/div.
VCC
5V/div.
IOUT
2A/div.
VDS
100V/div.
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13
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
TYPICAL PERFORMANCE CHARACTERISIC (continued)
VIN=230VAC, VOUT=19V, IOUT=2.35A, TA=25°C, unless otherwise noted.
HFC0500 Rev. 1.1
5/10/2019
www.MonolithicPower.com
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© 2019 MPS. All Rights Reserved.
14
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
TYPICAL PERFORMANCE CHARACTERISIC (continued)
VIN=230VAC, VOUT=19V, IOUT=2.35A, TA=25°C, unless otherwise noted.
No Load Power Consumption
VIN (VAC/Hz)
PIN (mW)
HFC0500 Rev. 1.1
5/10/2019
85/60
73.63
115/60
67.31
230/50
72.37
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265/50
78.86
15
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
OPERATION
HFC0500 incorporates all the necessary features
to build a reliable switch-mode power supply. It is
a fixed-frequency current-mode controller with
internal slope compensation. At light loads, the
controller freezes the peak current and reduces
its switching frequency down to 25kHz to
minimize switching losses. When the output
power falls below a given level, the controller
enters burst mode. It also has excellent EMI
performance due to frequency jittering.
Its high level of integration requires very few
external components.
Figure 1: Functional Block Diagram
HFC0500 Rev. 1.1
5/10/2019
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16
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
Fixed-Frequency with Jitter
Frequency Foldback
Frequency jitter reduces EMI by spreading the
energy over the jitter frequency range. Figure 2
shows the circuit of frequency jittering.
FB
VDD
14pF
10uA
Timer
3.2V
20uA
2.8V
S
Q
R
_
Q
The HFC0500 implements frequency foldback at
light load condition to improve overall efficiency.
When the load decreases to a given level
(1.0V3
0.25mm*2
30
matching with wire
N2
4—>5
0.15mm*2
7
matching with wire
1
1
E1
5—>Nc
0.1mm*12
Wind with tight
tension across
entire bobbin
evenly
N3
P—>N
0.5mm*2(T.I,W)
11
2
2
1
HFC0500 Rev. 1.1
5/10/2019
E2
5—>NC
0.1mm*2
Wind with tight
tension across
entire bobbin
evenly
N4
3—>1
0.25mm*2
30
matching with wire
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26
HFC0500 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
FLOW CHART
Start
Y
Internal High Voltage
Current Source ON
Shut Down
Internal High Voltage
Current Source
Y
Vcc>15V
Vcc Decrease
to 5.3V
N
Y
Y
OTP=
Logic High ?
Y
Vcc
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