MP6902
Fast Turn-off Intelligent Controller
MP6902 Rev. 1.14 www.MonolithicPower.com 1
6/23/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP6902 is a Low-Drop Diode Emulator IC
for Flyback converters which combined with an
external switch replaces Schottky rectification
diodes for high efficiency. The chip regulates
the forward drop of an external switch to about
70mV and switches it off as soon as the voltage
becomes negative. MP6902 has a light-load
sleep mode that reduces the quiescent current
to <300uA.
FEATURES
Supports DCM and Quasi-Resonant
Flyback Converters
Works with 12V Standard and 5V Logic
Level FETS
Compatible with Energy Star, 1W Standby
Requirements
V
DD
Range From 8V to 24V
70mV V
DS
Regulation Function
(1)
Fast Turn-off Total Delay of 20ns
Max 400kHz Switching Frequency
Light Load Mode Function
(1)
with <300μA
Quiescent Current
Supports High-side and Low-side
Rectification
Power Savings of Up to 1.5W in a Typical
Notebook Adapter
APPLICATIONS
Industrial Power Systems
Distributed Power Systems
Battery Powered Systems
Flyback Converters
A
ll MPS parts are lead-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 o
f
Monolithic Power Systems, Inc.
Notes:
1) Related issued patent: US Patent US8,067,973; US8,400,790.
CN Patent ZL201010504140.4; ZL200910059751.X. Othe
r
patents pending.
TYPICAL APPLICATION
MP6902- FAST TURN-OFF INTELLIGENT CONTROLLER
MP6902 Rev. 1.14 www.MonolithicPower.com 2
6/23/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking
MP6902DS
SOIC8
MP6902DS
* For Tape & Reel, add suffix –Z (e.g. MP6902DS–Z);
For RoHS Compliant Packaging, add suffix –LF; (e.g. MP6902DS–LF–Z)
PACKAGE REFERENCE
PGND
EN
LL
V
D
V
G
NC
V
DD
V
SS
1
2
3
4
8
7
6
5
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
(2)
V
DD
to V
SS
.................................... -0.3V to +27V
PGND to V
SS
............................... -0.3V to +0.3V
V
G
to V
SS
......................................... -0.3V to V
CC
V
D
to V
SS
.................................... -0.7V to +180V
LL, EN to V
SS
.............................. -0.3V to +6.5V
Maximum Operating Frequency ............ 400 kHz
Continuous Power Dissipation (T
A
=+25°C)
(3)
............................................................ 1.4W
Junction Temperature .............................. 150°C
Lead Temperature (Solder) ...................... 260°C
Storage Temperature .............. -55°C to +150°C
Recommended Operation Conditions
(4)
V
DD
to V
SS
.......................................... 8V to 24V
Operating Junction Temp. (T
J
). ... -40°C to +125°C
Thermal Resistance
(5)
θ
JA
θ
JC
SOIC8 .................................... 90 ...... 45 ... °C/W
Notes:
2) Exceeding these ratings may damage the device.
3) 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 a
t
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.
4) The device is not guaranteed to function outside of its
operating conditions.
5) Measured on JESD51-7, 4-layer PCB.
MP6902- FAST TURN-OFF INTELLIGENT CONTROLLER
MP6902 Rev. 1.14 www.MonolithicPower.com 3
6/23/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
DD
= 12V, T
A
= +25°C, unless otherwise noted.
Paramete
r
Symbol Conditions Min Typ Max Units
V
DD
Voltage Range
8 24 V
V
DD
UVLO Rising 5.0 6.0 7.0 V
V
DD
UVLO Hysteresis 0.8 1 1.2 V
Operating Current I
CC
C
LOAD
=5nF, F
SW
=100kHz 8 10 mA
Quiescent Current I
q
V
SS
-V
D
=0.5V 2 3 mA
Shutdown Current
V
DD
=4V 210 255
µA
V
DD
=20V, EN=0V 375 440
Light-load Mode Current 290 380 µA
Thermal Shutdown 150
o
C
Thermal Shutdown Hysteresis 30
o
C
Enable UVLO Rising 1.1 1.5 1.9 V
Enable UVLO Hysteresis 0.2 0.4 V
Internal Pull-up Current On EN
Pin
10 15 µA
CONTROL CIRCUITRY SECTION
V
SS
–V
D
Forward Voltage V
fwd
55 70 85 mV
Turn-on Delay
T
Don
C
LOAD
= 5nF 150 ns
T
Don
C
LOAD
= 10nF 250 ns
Input Bias Current On V
D
Pin V
D
= 180V 1 µA
Minimum On-time
(5)
T
MIN
C
LOAD
= 5nF 1.6 µs
Light-load-enter Delay T
LL-Dela
R
LL
=100k 100 µs
Light-load-enter Pulse Width T
LL
R
LL
=100k 1.3 1.75 2.2 µs
Light-load-enter Pulse Width
Hysteresis
T
LL-H
R
LL
=100k 0.2 µs
Light-load Resistor Value R
LL
30 300 k
Light-load Mode Exit Pulse
Width Threshold (V
DS
)
V
LL-DS
-400 -250 -150 mV
Light-load Mode Enter Pulse
Width Threshold (V
GS
)
(6)
V
LL-GS
1.0 V
GATE DRIVER SECTION
V
G
(Low) I
LOAD
=1mA 0.05 0.1 V
V
G
(High)
V
DD
>17V 13 14 15 V
V
DD
<17V V
DD
-2.2
Turn-off Threshold (V
SS
-V
D
) 30 mV
Turn-off Propagation Delay V
D
=V
SS
15 ns
Turn-off Total Delay
T
Doff
V
D
=V
SS
, C
LOAD
=5nF,
R
GATE
=0Ω
35 ns
T
Doff
V
D
=V
SS
, C
LOAD
=10nF,
R
GATE
=0
45 ns
Pull Down Impedance 1 2
Pull Down Current
(
6
)
3V <V
G
<10V 2 A
Notes:
6) Guaranteed by Design and Characterization.

MP6902DS-LF

Mfr. #:
Manufacturer:
Monolithic Power Systems (MPS)
Description:
AC/DC Converters Fast-Off Intelligent Rectifier Driver
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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