MP44014
Boundary Mode PFC Controller
The Future of Analog IC Technology
FEATURES
DESCRIPTION
The MP44014 is a boundary conduction mode
PFC controller that provides simple, highperformance, active power factor correction
using minimal external components.
The output voltage is regulated accurately by a
high-performance voltage mode amplifier with
an accurate internal voltage reference.
The precise, adjustable output over-voltage
protection greatly enhances system reliability.
The on-chip R/C filter on the current sense pin
can potentially eliminate the external R/C filter.
The extremely low start-up current, quiescent
current, and disable function reduces power
consumption, resulting in excellent efficiency
performance.
Boundary Conduction Mode PFC Controller
for Pre-Regulator
Zero-Crossing Compensation to Minimum
THD of the AC Input Current
Precise Adjustable Output Over-Voltage
Protection
Ultra-Low (15μA) Start-U p Current
Low Quiescent Current (0.46uA) at OVP
Condition
On-Chip Filter on Current Sense Pin
Disable Function on ZCS Pin
-750mA/+800mA Peak Gate Drive Current
Available in SOIC-8 Packages
APPLICATIONS
The MP44014 is available in a SOIC-8 package.
Offline Adaptors
Electronic Ballast
LLC Front End
Other PFC Pre-Regulators
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.
Other patents pending.
TYPICAL APPLICATION
L1
R3
D2
R10
C2 R4
D1
D3
R1
C4 R6
R5
C6
U1
ZCS
VCC
C1
MULT
COMP
C5
Q1
FB
M44014
GATE
GND
CS
R7
C8
R11
R8
R2
C3
C7
R9
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
1
MP44014 – BOUNDARY MODE PFC CONTROLLER
ORDERING INFORMATION
Part Number
Package
SOIC-8
MP44014GS*
Top Marking
See Below
* For Tape & Reel, add suffix –Z (e.g. MP44014GS–Z)
TOP MARKING
MP44014: Part number
LLLLLLLL: Lot number
MPS: MPS prefix
Y: Year code
WW: Week code
PACKAGE REFERENCE
1
FB
VCC
8
2
COMP
GATE
7
3
MULT
GND
6
4
CS
ZCS
5
ABSOLUTE MAXIMUM RATINGS (1)
Thermal Resistance
Supply voltage (VCC) .............. -0.5V to self limit
Analog inputs and outputs (2)..........-0.3V to 6.5V
ZCS max. current......................-2.5mA to 10mA
Continuous power dissipation (TA = +25°C) (3)
SOIC-8 ....................................................... 1.4W
Junction temperature………………… …..150C
Lead temperature (solder) ........................260C
Storage temperature ................ -55C to +150C
SOIC-8 ....................................90 ...... 45 ... C/W
Recommended Operating Conditions
(4)
Supply voltage (VCC) ....................13.4V to 22V
Analog inputs and outputs .............-0.3V to 6.5V
Operating junction temp. (TJ). .. -40°C to +125°C
(5)
θJA
θJC
NOTES:
1) Exceeding these ratings may damage the device.
2) Except ZCS pin, which is self limited.
3) 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
Exceeding
the
maximum
D(MAX)=(TJ(MAX)-TA)/θJA.
allowable power dissipation will produce an excessive die
temperature, causing the regulator to go into thermal
shutdown. Internal thermal shutdown circuitry protects the
device from permanent damage.
4) The device is not guaranteed to function outside of its
operating conditions.
5) Measured on JESD51-7, 4-layer PCB.
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
2
MP44014 – BOUNDARY MODE PFC CONTROLLER
ELECTRICAL CHARACTERISTICS
VCC = 15V, CGATE = 1nF, TJ = -40C~+125C, unless otherwise noted.
Parameter
Supply Voltage
Operating range
Turn-on threshold
Turn-off threshold
Hysteresis
Zener voltage
Supply Current
Start-up current
Quiescent current
Symbol
Operating current
Icc
Quiescent current
Iq
Multiplier
Input bias current
Linear operation range
Output max. slope
Gain(6)
VCC
VCC_on
VCC_off
VCC_hys
Vz
Istartup
Iq
Condition
Min
After turn on
10.7
11
8.7
2.1
22
IIN = 20mA
VCC = 11V
No switch
Fs
=
70kHz,
CLOAD = 1nF
During OVP (either
static or dynamic)
or VFB ≤ 150mV
IMULT
VMULT
ΔVCS/ΔVMULT
K
Typ
Max
Units
25
21
13.8
10.8
3
29
V
V
V
V
V
15
2.5
30
3.2
µA
mA
3.5
4.5
mA
0.46
0.7
mA
-1
3
µA
V
12.3
9.8
0
VMULT = 0~0.6V
VCOMP = upper clamp
VMULT = 1V, VCOMP = 4V,
TJ = 25oC
1.60
1.90
V/V
0.5
0.6
0.7
1/V
2.465
2.5
2.535
V
2
5
mV
1
µA
-6.9
mA
Error Amplifier
Feedback voltage
Feedback voltage line regulation
Feedback bias current
Source current
VFB
VFB_LR
IFB
ICOMP_source
TJ = 25 oC
VCC = 10.7V to 22V
VFB = 2.6V
VCOMP = 4V, VFB = 2.4V,
TJ = 25oC
VCOMP = 4V, VFB = 2.6V,
TJ = 25oC
-2.7
-4.7
3
5
Sink current
ICOMP_sink
Upper clamp voltage
VCOMP_H
VFB = 2V, Icomp = -0.5mA
5.5
6.1
6.5
V
Lower clamp voltage
VCOMP_L
VFB = 2V, Icomp = -0.5mA
2.0
2.15
2.3
V
-1
95
1.83
µA
ns
ns
V
mV
mV
8.6
V
Current Sense Comparator
Input bias current
Turn-off delay
LEB time
Current sense clamp voltage
VCS_Clamp
Current sense offset
VCS_Offset
VMULT = 0V
VMULT = 2.5V
VZCSclamp_H
IZCS = 2.5mA
Zero Current Sensor
Upper clamp voltage
ICS
TDT
TLEB
CS = 0
MULT = 0.2V
MULT = 0.2V
45
1.6
7.1
190
70
1.72
26
8
7.8
mA
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
3
MP44014 – BOUNDARY MODE PFC CONTROLLER
ELECTRICAL CHARACTERISTICS (continued)
VCC = 15V, CGATE = 1nF, TJ = -40C~+125C, unless otherwise noted.
Parameter
Lower clamp voltage
Zero current sensing threshold
ZCS_DISABLE threshold
ZCS_EN threshold
Source current capability
Restart current after disable
Re-Starter
Re-start time
Over Voltage
Dynamic OVP current
Hysteresis
Static OVP threshold
Gate Driver
Dropout voltage
Symbol
Condition
VZCSclamp_L IZCS = -2.5mA
VZCS_H
VZCS rising
VZCS_L
VZCS falling
VZCS_DISABLE_
VZCS_EN
IZCS_source
IZCS_res
Min
Typ
Max
Units
0.2
0.5
2.1
1.56
185
320
0.7
2.21
1.66
230
380
V
V
V
mV
mV
mA
µA
1.45
140
260
-1.8
55
85
Tstart
80
175
280
µs
IOVP
35
45
IOVP_Hys
VOVP
2.15
40
30
2.25
µA
µA
V
VOH
VOL
Tf
Tr
VD_max
Voltage fall time
Voltage rise time
Max. output drive voltage
Source current capability
Sink current capability
IGate_source
IGate_sink
UVLO saturation voltage
VSaturation
IGDsource = 20mA
IGDsource = 200mA
IGDsink = 200mA
12
2.4
3.9
0.9
30
40
13.5
-750
800
VCC = 0 to VCC_ON,
IGate_sink = 10mA
2.35
3.1
5.0
1.9
70
80
15.5
V
V
V
ns
ns
V
mA
mA
0.3
V
NOTES:
6) The multiplier output is given by: Vcs = K·VMUTL·(VCOMP-2.5).
7) Guaranteed by design.
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
4
MP44014 – BOUNDARY MODE PFC CONTROLLER
TYPICAL PERFORMANCE CHARACTERISTICS
10
100
14
OPERATING
13
10
NON OVP
1
1
12
11
OVP
0.1
0.01
9
START-UP
0
5
10
15
20
25
30
28
FALLING
10
0.1
0.001
RISING
0.01
-50
0
50
100
150
8
-50
2.6
250
2.55
200
2.5
150
2.45
100
0
50
100
150
0
50
100
150
0
50
100
150
26
24
22
20
-50
0
50
100
150
2.4
-50
1.8
45
1.6
0
50
100
150
UPPER
CLAMP
50
-50
0.8
1.4
40
1.2
0.6
1
35
0.8
0.6
30
0.4
0.4
0.2
25
-50
0
50
100
150
0
0 0.5 1 1.5 2 2.5 3 3.5 4
0.2
-50
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
5
MP44014 – BOUNDARY MODE PFC CONTROLLER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
3.5
8
10
3
8
2.5
6
6
2
1.5
4
4
1
2
0
-50
0.5
0
50
100
150
2
0
100
200
300
400
500
0
0
100
200
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
300
400
500
6
MP44014 – BOUNDARY MODE PFC CONTROLLER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VOUT
AC Coupled
5V/div.
VOUT
AC Coupled
5V/div.
VREC
100V/div.
VREC
100V/div.
VREC
100V/div.
IL
1A/div.
IL
1A/div.
IL
1A/div.
VOUT
AC Coupled
5V/div.
IL
1A/div.
VOUT
100V/div.
VOUT
100V/div.
VREC
100V/div.
VREC
100V/div.
IL
2A/div.
IL
2A/div.
VZCS
5V/div.
VGATE
20V/div.
35
30
VREC
20V/div.
25
20
VGATE
20V/div.
15
10
IL
500mA/div.
5
0
3 7 11 15 19 23 27 31 35 39
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
7
MP44014 – BOUNDARY MODE PFC CONTROLLER
PIN FUNCTIONS
Pin #
1
Name
FB
2
COMP
3
MULT
4
CS
5
ZCS
6
GND
7
GATE
8
VCC
Description
Feedback. The output voltage is fed into FB through a resistor divider.
Output of the error amplifier. A compensation network is connected between COMP and
FB.
Input of the multiplier. Connect MULT to the rectified main voltage via a resistor divider to
provide the sinusoidal reference for the current control loop.
Current sense. The current through the MOSFET is fed into CS via a resistor. The resulting
voltage on CS is compared with the output of the internal multiplier to get an internal
sinusoidal-shaped reference to determine the MOSFET’s turn-off. The on-chip R/C filter can
reduce high frequency noise on CS. Also, suggest to add a RC filter on the CS pin in case of
switching noise is too large.
Inductor’s zero-crossing current sensing input. A negative transition edge triggers the
MOSFET’s turn-on. Suggest to connect a 22pF cap from this ZCS to GND to tune ZVS point.
Ground.
Gate driver output. The high output current of the gate driver is able to drive a low-cost
power MOSFET. The high-level voltage of GATE is clamped to 12V in case GATE is supplied
with a high VCC.
Supply voltage for both the signal path of the IC and the gate driver. A bypass capacitor
from VCC to ground is needed to reduce noise.
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
8
MP44014 – BOUNDARY MODE PFC CONTROLLER
FUNCTIONAL BLOCK DIAGRAM
Figure 1: Functional Block Diagram
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
9
MP44014 – BOUNDARY MODE PFC CONTROLLER
OPERATION
The MP44014 is a boundary conduction mode
PFC controller optimized for the PFC preregulator up to 300W and fully complies with
IEC1000-3-2 specification.
Output Voltage Regulation
The output voltage is sensed at FB through a
resistor divider from the output voltage to ground.
The accurate on-chip reference voltage and the
high performance error amplifier regulate the
output voltage accurately.
When the load is very light, the output voltage
tends to stay steadily above the nominal value. In
this condition, the error amplifier output will
saturate low. When the error amplifier output is
lower than 2.25V, static OVP will be triggered.
Consequently, the gate driver will be blocked to
turn off the external power MOSFET, and the
device will enter an idle state. Normal operation
resumes once the error amplifier output returns
to the regulated region (see Figure 2).
Over-Voltage Protection (OVP)
The MP44014 offers two stages of over-voltage
protection: dynamic over-voltage protection and
static over-voltage protection. With two-stage
protection, the circuit operates reliably.
The MP44014 achieves OVP by monitoring the
current flow through COMP.
During steady-state operation, the current flow
through the high-side feedback resistor (R9) and
the low-side feedback resistor (R10) is calculated
with Equation (1):
IR9
V VFB
V
O
IR10 FB
R9
R10
(1)
If there is an abrupt rise on the output (ΔVO) and
the compensation network connected between
FB and COMP takes time to achieve high power
factor (PF) due to the long RC time constant, the
voltage on FB will still be kept at the reference
value. The current through R10 remains equal to
VFB/R10. However, the current through R9 is
calculated with Equation (2):
'
IR9
VO VO VFB
R9
Figure 2: OVP Detector Block
Disable Function
The MP44014 can be disabled by pulling the
zero-current sensing (ZCS) pin lower than
190mV. This helps to further reduce quiescent
current when the PFC pre-regulator needs to be
shut down. After releasing ZCS, it will stay at a
lower clamp voltage when there is no external
voltage from the auxiliary winding (see Figure 3).
(2)
This current has to flow into COMP.
Simultaneously, this current is monitored inside
the chip. If the current rises to 35µA, the output
voltage of the multiplier will be forced to decrease,
and the energy delivered to the output will be
reduced. If this current continues to rise to about
40µA, the dynamic OVP can be triggered.
Consequently, the gate driver is blocked to turn
off the external power MOSFET, and the device
enters an idle state. This state is maintained until
the current falls below 10µA, the point at which
the internal starter will be re-enabled and allow
the switching to restart.
Figure 3: ZCS Triggering and Disable Block
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
10
MP44014 – BOUNDARY MODE PFC CONTROLLER
Boundary Conduction Mode
When the current of the boost inductor reaches
zero, the voltage on the inductor is reversed.
ZCS then generates the turn-on signal of the
MOSFET by sensing the falling edge of the
voltage on the auxiliary winding coupled with the
inductor. If the ZCS voltage rises above 2.1V, the
comparator waits until the voltage falls below
1.6V. Once the voltage falls below 1.6V, the
MP44014 turns on the MOSFET. The 7.8V high
clamp and 0.55V low clamp protect ZCS. The
internal 175µs timer generates a signal to turn on
the MOSFET if the driver signal has been low for
more than 175µs. This also allows the MOSFET
to turn on during the start-up period since no
signal is generated from ZCD during start-up.
Zero-Crossing Compensation
The MP44014 offers 30mV voltage offset for the
multiplier output near the zero crossing of the line
voltage (which can force the circuit to process
more energy at the bottom of the line voltage).
With this function, the THD of the current is
reduced.
To prevent redundant energy, this offset is
reduced as the instantaneous line voltage
increases. Therefore the offset will be negligible
near the top of the line voltage.
Power Factor Correction
The MP44014 senses the inductor current
through the current sense pin and compares it
to the sinusoidal-shaped signal, which is
generated from the output of the multiplier. When
the external power MOSFET turns on, the
inductor current rises linearly. When the peak
current hits the sinusoidal-shaped signal, the
external power MOSFET begins to turn off, and
the diode turns on. Also, the inductor current
begins to fall. When the inductor current reaches
zero, the power MOSFET begins to turn on again,
which causes the inductor current to start rising
again. The power circuit works in boundary
conduction mode, and the envelope of the
inductor current is sinusoidal shaped. The
average input current is half of the peak current,
so the average input current is also sinusoidal
shaped. A high power factor can be achieved
through this control method (see Figure 4).
Multiplier output
Inductor current
Input average current
Figure 4: Inductor Current Waveform
The control flow chart of the MP44014 is shown
in Figure 5.
Figure 5: Control Flow Chart
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
11
MP44014 – BOUNDARY MODE PFC CONTROLLER
PACKAGE INFORMATION
SOIC-8
0.189(4.80)
0.197(5.00)
8
0.050(1.27)
0.024(0.61)
5
0.063(1.60)
0.150(3.80)
0.157(4.00)
PIN 1 ID
1
0.228(5.80)
0.244(6.20)
0.213(5.40)
4
TOP VIEW
RECOMMENDED LAND PATTERN
0.053(1.35)
0.069(1.75)
SEATING PLANE
0.004(0.10)
0.010(0.25)
0.013(0.33)
0.020(0.51)
0.0075(0.19)
0.0098(0.25)
SEE DETAIL "A"
0.050(1.27)
BSC
SIDE VIEW
FRONT VIEW
0.010(0.25)
x 45o
0.020(0.50)
GAUGE PLANE
0.010(0.25) BSC
0o-8o
0.016(0.41)
0.050(1.27)
DETAIL "A"
NOTE:
1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN
BRACKET IS IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSIONS.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.004" INCHES MAX.
5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA.
6) DRAWING IS NOT TO SCALE.
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP44014 Rev. 1.01
www.MonolithicPower.com
11/10/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
12
工商网监
湘ICP备2023018690号
