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MPX2003 Datasheet(PDF) 30 Page - Monolithic Power Systems

Part # MPX2003
Description  Up to 140kHz All-in-One Flyback Controller with Integrated Primary Control Circuitry and Secondary Synchronous Rectification Driver
PDF  37 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MPX2003 Datasheet(HTML) 30 Page - Monolithic Power Systems

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MPX2003
– UP TO 140kHz ALL-IN-ONE FLYBACK CONTROLLER
MPX2003 Rev. 1.0
MonolithicPower.com
30
8/5/2022
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2022 MPS. All Rights Reserved.
ID
IPEAK
VG
SR Conduction Period
50% SR Conduction Period
IC
Figure 22: SR Waveforms in QR Mode
To effectively utilize the MOSFET’s RDS(ON), the
MOSFET should be completely turned on for at
least 50% of the SR conduction period. VDS can
be estimated with Equation (23):
DS
C
ON
OUT
ON
FWD
V
-I
R
-2 I
R
-V
=
=
(23)
Where VFWD is the forward voltage threshold.
The MOSFET’s RDS(ON) should not be lower than
12 / IOUT (in mΩ). For example, for a 5A
application, RDS(ON) should not be below 2.4mΩ.
Design Example
Table 1 shows a design example when using the
MPX2003 for a 65W PD charger application.
Table 1: Design Specifications
Parameter
Symbol
Value
Input
specifications
VIN
90VAC to 265VAC,
47Hz to 63Hz
Output
specifications
VOUT /
IOUT
5VDC / 0A to 3A,
9VDC / 0A to 3A,
12VDC / 0A to 3A,
15VDC / 0A to 3A,
20VDC / 0A to 3.25A



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