MP9989
CCM/DCM Flyback Ideal Diode
with Integrated 100V/10mΩ MOSFET
and No Need for Auxiliary Winding
DESCRIPTION
FEATURES
The MP9989 is a fast turn-off, intelligent rectifier
for flyback converters that integrates a 100V
MOSFET. It can replace a diode rectifier for
higher efficiency and power density. The chip
regulates the forward voltage drop of the internal
power switch to 40mV(1) and turns off before the
drain-source voltage reverses.
The MP9989 can generate its own supply
voltage without the need for auxiliary winding,
which makes it suitable for charger applications
with a low output voltage requirement or any
other adaptor applications with high-side set-up.
The internal ringing detection circuitry prevents
the MP9989 from falsely turning on during
discontinuous conduction mode (DCM) or quasiresonant operations.
Integrated 100V/10mΩ MOSFET
Wide Output Range down to 0V
No Need for Auxiliary Winding for High-Side
or Low-Side Rectification
Ringing Detection Prevents False Turn-On
during DCM Operations
Compatible with Energy Star
110µA Quiescent Current
Supports DCM, CCM, and Quasi-Resonant
Operations
Available in SOIC-8 and QFN4x5-8
Packages
APPLICATIONS
The MP9989 is available in SOIC-8 and
QFN4x5-8 packages.
Laptop Adapters
QC and USB PD Charger
High-Efficiency Flyback Converters
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”,
the MPS logo, and “Simple, Easy Solutions” are registered trademarks of
Monolithic Power Systems, Inc. or its subsidiaries.
Note:
1)
Related issued patent: US Patent US8, 067,973; US8,400,790. CN
Patent ZL201010504140.4. Other patents pending.
TYPICAL APPLICATION
VDD
SENSE
VS
VD
MP9989
MP9989 Rev. 1.1
8/27/2020
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1
MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
ORDERING INFORMATION
Part Number
MP9989GS*
MP9989GV**
Package
SOIC-8
QFN4x5-8
Top Marking
See Below
See Below
MSL Rating
2
2
* For Tape & Reel, add suffix –Z (e.g. MP9989GS–Z).
** For Tape & Reel, add suffix –Z (e.g. MP9989GV–Z).
TOP MARKING (MP9989GS)
MP9989: Part number
LLLLLLLL: Lot number
MPS: MPS prefix
Y: Year code
WW: Week code
TOP MARKING (MP9989GV)
MPS: MPS prefix
Y: Year code
WW: Week code
MP9989: Part number
LLLLLL: Lot number
MP9989 Rev. 1.1
8/27/2020
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2
MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
PACKAGE REFERENCE
MP9989 Rev. 1.1
8/27/2020
TOP VIEW
TOP VIEW
SOIC-8
QFN4x5-8
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MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
PIN FUNCTIONS
Pin #
SOIC-8
Pin #
QFN4x5-8
Name
1
1
VDD
2
2
SENSE
3, 4
5, 6, 7, 8
3, 4
5, 6, 7, 8
VS
VD
Description
Linear regulator output. VDD is the supply of the MP9989.
MOSFET drain voltage sensing. SENSE is also used as the linear
regulator input.
MOSFET source. VS is also used as a reference for VDD.
MOSFET drain.
θJA
θJC
ABSOLUTE MAXIMUM RATINGS (2)
Thermal Resistance (6)
VDD to VS ................................... -0.3V to +14V
VD to VS .................................... -1.5V to +100V
SENSE to VS ................................ -1V to +180V
Continuous drain current (TC = 25°C)
SOIC-8 .....................................................14.9A
QFN4x5-8 .................................................28.1A
Continuous drain current (TC = 100°C)
SOIC-8 .....................................................9.42A
QFN4x5-8 .................................................17.8A
Pulsed drain current (3)
SOIC-8 ........................................................50A
QFN4x5-8 ....................................................94A
Maximum power dissipation (4)
SOIC-8 ......................................................1.7W
QFN4x5-8 ................................................ 3.1W
Junction temperature ............................... 150°C
Lead temperature (solder) ....................... 260°C
Storage temperature ............... -55°C to +150°C
SOIC-8 ................................... 70 ...... 32 ... C/W
QFN4x5-8 .............................. 40 ....... 9 .... C/W
Notes:
2)
3)
4)
5)
6)
Exceeding these ratings may damage the device.
Repetitive rating: Pulse width = 100µs, duty cycle limited by
maximum junction temperature.
TA = +25°C. The maximum allowable power dissipation is a
function of the maximum junction temperature TJ (MAX), the
junction-to-ambient thermal resistance θJA, and the ambient
temperature TA. The maximum allowable continuous power
dissipation at any ambient temperature is calculated by P D
(MAX) = (TJ (MAX) - TA) / θJA. Exceeding the maximum
allowable power dissipation produces an excessive die
temperature, causing the regulator to go into thermal
shutdown. Internal thermal shutdown circuitry protects the
device from permanent damage.
The device is not guaranteed to function outside of its
operating conditions.
Measured on JESD51-7, 4-layer PCB.
ESD Rating
Human-body model (HBM) .................... ±1200V
Charged device model (CDM) ................ ±2000V
Recommended Operation Conditions (5)
VDD to VS ...................................... 4.5V to 13V
Operating junction temp (TJ) .... -40°C to +125°C
MP9989 Rev. 1.1
8/27/2020
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MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
ELECTRICAL CHARACTERISTICS
VDD = 6.7V, TJ = -40 to about +125°C, unless otherwise noted.
Parameter
Drain-source breakdown
voltage
VDD UVLO rising
VDD UVLO hysteresis
VDD maximum charging
current
Operating current
Quiescent current
Control Circuitry Section
Forward regulation voltage
(VS-VD) (7)
Symbol
Conditions
Min
V(BR)DSS
TJ = 25°C
100
4.0
0.1
Max
Units
V
4.2
0.24
4.4
0.38
V
V
IVDD
VDD = 5.5V, SENSE = 30V
63
ICC
fSW = 100kHz
VDD = 7V
4
110
6
135
mA
µA
25
40
55
mV
-115
-80
-57
mV
-6
3
12
mV
0.8
20
25
1.2
1.55
ns
ns
µs
3
V
IQ(VDD)
VFWD
Turn-on threshold (VDS)
Turn-off threshold (VS-VD) (7)
Turn-on delay (8)
tD-ON
(7)
Turn-off delay
tD-OFF
Turn-on blanking time
tB-ON
Turn-off blanking threshold
VB-OFF
(VDS)
Turn-off threshold during
minimum on time (VDS)
Turn-on slew rate detection
time (8)
Power Switch Section
Single pulse avalanche
EAS
energy (9)
Drain-source on state
RDS(ON)
resistance
Input capacitance
CISS
Output capacitance
COSS
Reverse transfer capacitance
CRSS
Source-Drain Diode Characteristics
Source-drain diode forward
voltage
Reverse recovery time
Diode reverse change
Typ
CLOAD = 2.2nF
2
mA
1.8
V
30
ns
VDD = 50V, VGS = 10V,
L = 1.0mH, TJ = 25°C
20
mJ
ID = 2A,TJ = 25°C
10
VDS = 40V, VGS = 0V,
f = 1MHz
VSD
IS = 8A, VGS = 0V
tRR
QRR
IF = 10A, dl/dt = 100A/μs
12.5
3850
614
40
0.8
78.8
105.6
mΩ
pF
pF
pF
1.2
V
ns
nC
Notes:
7) Guaranteed by characterization.
8) Guaranteed by design.
9) EAS is tested at starting TJ = 25°C, L = 1mH, IAS = 6.4A, VDD = 50V, VGS = 10V
MP9989 Rev. 1.1
8/27/2020
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5
MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
TYPICAL CHARACTERISTICS
VDD = 6.7V, unless otherwise noted.
VD-VS Breakdown Voltage vs.
Temperature
VDD Rising vs. Temperature
4.4
4.35
120
VDD_RISING (V)
BREAKDOWN VOLTAGE (V)
125
115
110
105
4.3
4.25
4.2
4.15
4.1
4.05
100
4
-50
0
50
100
TEMPERATURE (℃)
150
-50
-25
0
25 50 75 100 125 150
TEMPERATURE (℃)
VDD Maximum Charging Current vs.
Temperature
Operation Current vs. Temperature
4.2
100
4.15
90
4.1
80
4.05
IVDD (mA)
OPERATION CURRENT (mA)
VDD = 5.5V, SENSE = 30V
4
3.95
70
60
3.9
50
3.85
40
3.8
-50
-25
0
25 50 75 100 125 150
TEMPERATURE (℃)
30
-50
-25
0
25 50 75 100 125 150
TEMPERATURE (℃)
RDS(ON) vs. Temperature
1.8
RDS(ON) , (NORMALIZED)
DRAIN-SOURCE ON
RESISTANCE
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-70
MP9989 Rev. 1.1
8/27/2020
-20
30
80
130
TJ, JUNCTION TEMPERATURE (℃)
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MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
TYPICAL PERFORMANCE CHARACTERISTICS
Operation in 48W Flyback
Application
Operation in 48W Flyback
Application
VIN = 90VAC, IOUT = 4.0A
VIN = 265VAC, IOUT = 4.0A
CH1: VDS
20V/div.
CH1: VDS
20V/div.
CH4: IDS
5A/div.
CH4: IDS
5A/div.
10μs/div.
MP9989 Rev. 1.1
8/27/2020
10μs/div.
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7
MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
FUNCTIONAL BLOCK DIAGRAM
Figure 1: Functional Block Diagram
MP9989 Rev. 1.1
8/27/2020
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MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
OPERATION
The
MP9989
supports
operation
in
discontinuous
conduction
mode
(DCM),
continuous conduction mode (CCM), and quasiresonant flyback converters. The control circuitry
controls the gate in forward mode and turns the
gate off when the synchronous rectification (SR)
MOSFET current drops to zero.
VDD Generation
SENSE is the input for the linear regulator, the
output of which is VDD. VDD supplies the
MP9989, and is regulated at 6.7V.
When SENSE is under 4.7V, a 40mA current
source from SENSE charges up VDD. When
SENSE is above 4.7V, the linear regulator’s
maximum charging current is limited at IVDD to
charge the external capacitor at VDD.
Start-Up and Under-Voltage Lockout (UVLO)
When VDD rises above 4.2V, the MP9989 exits
under-voltage lockout (UVLO) and is enabled.
Once VDD drops below 4.0V, the MP9989
enters sleep mode and VGS is kept low.
Turn-On Phase
When VDS drops to ~2V, a turn-on timer begins.
If VDS reaches the -80mV turn-on threshold from
2V within the slew rate detection time (~30ns),
the MOSFET is turned on after a turn-on delay
tD-ON (~20ns) (see Figure 2). If VDS crosses 80mV after the timer ends, the gate voltage
remains off. This turn-on timer prevents the
MP9989 from falsely turning on due to ringing
from DCM and quasi-resonant operations.
Turn-On Blanking
The control circuitry contains a blanking function.
When the MOSFET turns on, the control circuit
ensures that the on state lasts for a specific
period of time. The turn-on blanking time is tB-ON
(~1.2µs) to prevent an accidental turn off due to
ringing. However, if VDS reaches 1.8V within the
turn-on blanking time, VGS is pulled low
immediately.
voltage level to enlarge the on resistance of the
synchronous MOSFET.
VDS
2V
-3mV
-40mV
-80mV
Driver Begins
to be Pulled
Down
VGS
Driver Turn
Off
2V
Turn-On
Delay
Turn-On
Blanking
Turn-Off Turn-Off
Delay Blanking
Figure 2: Turn-On/Turn-Off Timing Diagram
With this control scheme, VDS is adjusted to be
around VFWD even when the current through the
MOSFET is fairly low. This function keeps the
driver voltage at a very low level when the
synchronous MOSFET is turned off, which
boosts the turn-off speed and is especially
important to CCM operation.
Turn-Off Phase
When VDS rises to trigger the turn-off threshold (3mV), the gate voltage is pulled to zero after a
short turn-off delay of tD-OFF (about 25ns) (see
Figure 2).
Turn-Off Blanking
After the gate driver (VGS) is pulled to zero by VDS
reaching the turn-off threshold (-3mV), a turn-off
blanking time is applied, during which the gate
driver signal is latched off. The turn-off blanking
is removed when VDS rises above VB-OFF (2V)
(see Figure 2).
Conduction Phase
When VDS rises above the forward voltage drop,
VFWD (-40mV), according to the decrease of the
switching current, the MP9989 lowers the gate
MP9989 Rev. 1.1
8/27/2020
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MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
APPLICATION INFORMATION
Slew Rate Detection Function
In DCM operations, the demagnetizing ringing
may bring VDS below 0V. If VDS reaches the turnon threshold during the ringing, SR controllers
without the slew rate detection function may turn
on the MOSFET by mistake. This not only
increases power loss, but may also lead to
shoot-through if the primary side MOSFET is
turned on within the minimum on time.
Considering the slew rate of the ringing is always
much less than when the primary MOSFET is
completely turned off, this false turn-on situation
can be prevented by the slew rate detection
function. When the slew rate is less than the
threshold, the IC does not turn on the gate even
when VDS reaches the turn-on threshold. For
more details, see the Turn-On Phase section on
page 8.
SENSE
VDD
VS
VD
MP9989
Figure 3: Low-Side Rectification
VDD
SENSE
VS
VD
MP9989
Figure 4: High-Side Rectification
External Resistor on SENSE
Over-voltage conditions may lead to damage to
the device, so there must be appropriate
application design to guarantee safe operation,
especially on the high voltage pin.
Maximum Output Current
The allowed temperature rise of the MP9989
limits the maximum output current the device can
handle. The temperature rise is determined by its
own power loss. Generally, for a universal input
adapter the recommended rated output current
for MP9989 is 4A. For certain designs, the power
loss of the MP9989 can be calculated, so the
maximum output current can be deduced.
One common over-voltage condition is when the
body diode of the SR MOSFET is turned on, as
the forward voltage drop may exceed the
negative rating on the SENSE pin. In this case,
it is recommended to place an external resistor
between SENSE and the MOSFET drain. In
general, the resistance is recommended to be
about 100Ω to 300Ω.
The power loss of the MP9989 can be separated
into several parts: controller consumption,
integrated MOSFET conduction loss, and so on.
If the MP9989 works in continuous conduction
mode (CCM), reverse-recovery loss of the
integrated MOSFET must also be considered.
Each part of the loss can be calculated based on
Equation (1), Equation (2), and Equation (3):
On the other hand, this resistor also cannot be
too large, because it may compromise the VDD
supply and slow down the slew rate on the VDS
detection. In general, it is not recommended to
use a resistor greater than 300Ω, but for each
use case, it should be checked based on the
condition of VDD supply and the slew rate.
PLOSS _ CONTROLLER VSENSE _ P IDD
Typical System Implementations
Figure 3 and Figure 4 show the typical system IC
implementation in low-side rectification and highside rectification, respectively.
MP9989 Rev. 1.1
8/27/2020
tS _ ON
PLOSS _ SR _ CONDUCTION fSW
(1)
VSR _ SD (t) ISR _ SD (t)dt (2)
0
PLOSS _ SR _ RR
1
VDS IRR tF fSW
2
(3)
Where IDD is the current of the MP9989, and
VSENSE_P is the corresponding plateau voltage in
the SENSE pin when SR turns off. fSW is the SR
switching frequency, and tS_ON is the SR on
period, VSR_SD is the voltage drop from the SR,
and ISR_SD is the current flowing from the SR. IRR
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MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
is the peak reverse current and tF is the reverse
current fall time.
The total loss of the MP9989 (PLOSS) is the sum
of the above losses. If a RC snubber is used, the
power loss caused by this snubber must also be
taken into consideration.
The junction and case temperature rises can be
calculated with the thermal resistance of the
junction-to-ambient (θJA) and junction-to-case
(θJC). The junction temperature must be within
ABS (typically 150°C). Calculate ∆TJA and ∆TJC
with Equation (4) and Equation (5):
TJA PLOSS JA
(4)
TJC PLOSS JC
(5)
Layout Example
Figure 6 and Figure 7 show the layout example
for QFN4x5-8 package and SOIC-8 package in
high-side application of flyback power supply,
respectively. It is a single layer with a throughhole transformer. R2 and C2 are the RC snubber
network for the internal MOSFET. The sensing
loop (SENSE to the MOSFET drain) is optimized
and kept separate from the power loop. The VDD
decoupling capacitor (C1) is placed beside VDD.
The thermal resistance can be reduced in one of
several ways to lower the temperature: a thicker
copper layer attached to VD and VS, additional
vias for thermal dissipation, or heatsinks. The
real maximum output current can be set
combining the real tested data.
PCB Layout Guidelines
Efficient PCB layout is critical for stable
operation. For best results, refer to Figure 5,
Figure 6, Figure 7, and follow the guidelines
below.
1. Connect SENSE pin to different position for
an adjustable turn-off point of time during the
fast transients in CCM. In general, the farther
the junction point is from the VD, the earlier
the SR turns off. (See Figure 5).
Figure 6: Layout Example for QFN4x5-8 package
in Flyback High-Side Application
2. Keep the IC out of the power loop to prevent
the sensing loop and power loop from
interrupting each other.
Decoupling
Capacitor
VS
VDD
Sense Position
VD
SENSE
Figure 5: Voltage Sensing for VD/SENSE
3. Place a decoupling ceramic capacitor from
VDD to VS close to the IC for adequate
filtering.
MP9989 Rev. 1.1
8/27/2020
Figure 7: Layout Example for SOIC-8 package in
Flyback High-Side Application
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MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
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)
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
DETAIL "A"
MP9989 Rev. 1.1
8/27/2020
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.
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MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
PACKAGE INFORMATION
QFN4X5-8
PIN 1 ID
MARKING
PIN 1 ID
INDEX AREA
BOTTOM VIEW
TOP VIEW
SIDE VIEW
NOTE:
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE
MOLD FLASH.
3) LEAD COPLANARITY SHALL BE 0.08
MILLIMETERS MAX.
4) DRAWING REFERENCE TO JEDEC MO-220
5) DRAWING IS NOT TO SCALE.
RECOMMENDED LAND PATTERN
MP9989 Rev. 1.1
8/27/2020
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13
MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
CARRIER INFORMATION
SOIC-8
Pin1
1
1
1
1
ABCD
ABCD
ABCD
ABCD
Feed Direction
Part Number
Package
Description
Quantity/Reel
Quantity/
Tube
Quantity/
Tray
Reel Diameter
MP9989GS-Z
SOIC-8
2500
100
N/A
13in
Carrier
Tape
Width
12mm
Carrier
Tape
Pitch
8mm
QFN4X5-8
Pin1
1
1
ABCD
1
1
ABCD
ABCD
ABCD
Feed Direction
Part Number
Package
Description
Quantity/Reel
Quantity/
Tube
Quantity/
Tray
Reel Diameter
MP9989GV-Z
QFN4x5-8
5000
N/A
N/A
13in
MP9989 Rev. 1.1
8/27/2020
Carrier
Tape
Width
12mm
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Carrier
Tape
Pitch
8mm
14
MP9989 – FAST TURN-OFF INTELLIGENT RECTIFIER
Revision History
Revision #
1.1
1.1
MP9989 Rev. 1.1
8/27/2020
Revision
Date
8/272020
8/272020
Description
Update ABS.
Add sections for PCB layout.
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Pages
Updated
3
11
15
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