PN-DESIGNKIT-57 Datasheet by Bourns Inc.

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PORTNOTE° SOLUTIONS 3mm WM (90mm 3324? BOURNS“
www.bourns.com
COPYRIGHT© 2019 • BOURNS, INC. • 8/19 • 250C/K1990 • “PortNote is a registered service mark of Bourns, Inc.
“Bourns” and “Multifuse” are registered trademarks of Bourns, Inc. in the U.S. and other countries.
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USB
Power Delivery Protection
Bourns® PortNote® solutions provide protection recommendations for typical port threats.
Objective
The USB Power Delivery Specification enables
the maximum functionality of USB by
providing more flexible power delivery along
with data over a single cable. Increased and
low power levels (10-100 W) are delivered with
maximum efficiency. The power source must
be able to provide short circuit current limiting
to protect its port from excessive current while
at the same time maintaining the maximum
power needed by the peripheral without
accidentally tripping. This solution provides
this protection.
Benefit
In addition to providing port protection from
excessive current as mandated by power
delivery, this is a cost-effective solution
when compared to a separate overcurrent
protection IC.
Solution
1 Multifuse® PPTC Resettable Fuse:
MF-LSMF300/24X
(Profile 2: 9 V, 3 A, Profile 3: 15 V, 3 A)
2 5.0 V TVS Diodes:
CDDFN2-T5.0LC
3 4-Channel 3.3 V TVS Diode Arrays:
CDDFN10-3324P
1 High-Current Power Inductor:
SRP6540-4R7M
Compliance*
UL60950, USB PD 2.0, USB 3.1
Alternate Recommendations
MF-MSMF150/16X or
MF-SMDF150 (Profile 2: 12 V, 1.5 A)
Profile Vbus Power (W)
1 5 7.5 - 15
2 5 9 15 - 27
3 5 9 15 27 - 45
4 5 9 15 20 45 - 100
DC/DC Converter
USB
Host
SRP6540-4R7M
MF-LSMF300/24X
CDDFN2-T5.0LC
CDDFN2-T5.0LC
CDDFN10-3324P
CDDFN10-3324P
CDDFN10-3324P
+Vhost
sr
USB PD
Controller
L1
USB
Connector
Vbus
CC1
CC2
SSRX1
SSTX1
SSRX2
SSTX2
USB 1 Data
USB 2 Data
To order samples, click on the
“Request Sample” button online.
*The schematic illustrates a possible combination of the solution
products to achieve the stated protection goal and does not
constitute the complete circuit design. Customers should verify
actual device performance in their specific circuits and applications.
1. The Multifuse® products (MF-LSMF300X/24X,
MF-MSMF150/16X, MF-SMDF150) help ensure an
application’s compliance to
A. USB 3.1 (section 11.4.1.1.1) in that a polymer PTC may
be used for overcurrent protection of the DC bus; and
B. UL60950-1 Section 2.5 (Limited Power Source Table 2B)
in that any short circuit current shall be limited to less
than 8 A within 5 seconds.
2. The inductor model SRP6540-4R7M is part of the DC/DC
converter which provides the power levels (profiles) as
described in the USB PD 3.0 Standard.
3. The TVS diode array CDDFN10-3324P and TVS diode
CDDFN2T5.0LC provide ESD and surge protection to the Cable
Connect Lines (CC1, CC2) and data lines of the USB port.
Customers should evaluate the effects of the capacitance
of the TVS diode arrays on the quality of USB 3.1 data flow in
their specific circuits and applications.
4. Profile 4 as described is shown for informational purposes
only. This PortNote® Solution is applicable to
profiles 2 and 3.
MF-LSMF300/24X
CDDFN2-T5.0LC
CDDFN10-3324P
SRP6540-100M
Solution Products

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