LTP2884 Manual Datasheet

l ’ LINE I \p PRODUCT MANUAL LTP2884 TECHNOLOGY
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PRODUCT MANUAL LTP2884
Description
USB Isolator
The LT P 2884 is a complete USB isolator solution, ideal
for any application requiring ground isolation, protection
from large common mode voltage variations, or protection
from spikes and surges. Built with convenience in mind,
this robust isolator brings comprehensive protection to
a wide variety of applications without the need for any
configuration or additional software.
At the heart of the LT P 2884 is the LTM2884, an isolated
USB 2.0 compatible µModule
®
transceiver with isolated
power and automatic USB bus speed selection. Isolator
µModule technology uses coupled inductors and an iso-
lated power transformer to provide 2500VRMS of isolation
between the upstream and downstream USB interface. All
accessible lines on the LT P 2884 carry additional surge
protection and ESD protection up to ±20kV. Uninterrupted
communication is guaranteed for common mode transients
greater than 30kV/µs.
The LTP2884 is compatible with USB 2.0 full speed
(12Mbps) and low speed (1.5Mbps) operation. Automatic
L, LT, LTC, LTM, Linear Technology, µModule and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
speed selection configures integrated pull-up resistors on
the upstream port to match those sensed on the down-
stream device.
By default, downstream devices are powered
(up to 1W) by the upstream bus through an isolated DC/
DC converter. Optionally, a wall adapter can be used, in-
creasing available power to downstream devices to 2.5W.
The LT P 2884 has additional features which help to ensure
reliable operation. Status LEDs indicate the presence of
auxiliary and USB bus power. Warning LEDs indicate
overcurrent on the upstream bus and undervoltage on
the downstream bus, making it clear when an application
requires auxiliary power. High retention USB connectors
protect against accidental unplugging during operation.
Design files for this circuit board are available at
http://www.linear.com/demo
Features
n 2.5kVRMS Rated Dielectric Isolation Voltage for One
Minute
n USB 2.0 Full Speed and Low Speed Support
n Bus Powered with Optional External Supply
n Hot Plug Protection
n No Drivers or Software Required
n 400VRMS Continuous Working Voltage
n ±20kV ESD Protection
n High Common Mode Transient Immunity
n Small Rugged Enclosure
n LED Status and Warning Indicators
n High Retention USB Connectors
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PRODUCT MANUAL LTP2884
speciFications
MIN TYP MAX UNITS
Power
Operating Supply Range (Bus Power Mode) 4.4 5 5.5 V
Operating Supply Range (Auxiliary Power Mode) 9.6 12 14.4 V
Regulated Output Voltage 4.75 5 5.25 V
Downstream VBUS Source Current (Bus Power Mode) 200 mA
Downstream VBUS Source Current (Auxiliary Power Mode) 500 mA
USB Interface
Low Speed Data Rate 1.5 Mbps
Full Speed Data Rate 12 Mbps
Protection
Rated Dielectric Insulation Voltage 2500 VRMS
Maximum Continuous Working Voltage (Upstream to Downstream) 560
400
VPEAK
VRMS
Common Mode Transient Immunity 30 kV/µs
ESD Immunity ±20 kV
Mechanical
Dimensions 3.1 × 2.2 × 0.8 in
Weight 51 grams
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PRODUCT MANUAL LTP2884
connections anD inDicators
Auxiliary 12V DC: Power supply input for support of
>200mA downstream load applications. Power connec-
tor is standard 4mm type with positive center pin. Input
voltage range is 9.6V to 14.4V.
Upstream: High retention USB type B connector.
Connect with a standard USB cable to a computer or USB
host.
Downstream: High retention USB type A connector. Con-
nect with a standard USB cable to any USB 2.0 full speed
or low speed peripheral.
LED Indicators
VBUS: Green LED indicates the presence of VBUS voltage
on the upstream bus.
12V: Green LED indicates the presence of voltage on the
12V Auxiliary power input.
ILIM: Red LED shows when current on the up-stream VBUS
is near or exceeds the maximum allowed to guarantee
proper regulation of the downstream VBUS. If this LED is
on, the LT P 2884 needs to be powered from the 12V wall
adapter for the current application, increasing available
downstream power.
GOOD: This green LED indicates that the downstream
VBUS is above the minimum operating voltage of 4.75V.
LOW: This red LED indicates that downstream VBUS has
dropped below 4.75V. If on, it is an indicator that the current
load of the downstream device is too high for the current
configuration: >200mA for bus powered applications or
>500mA for 12V powered applications.
Note: 1. In bus powered hub applications the available
downstream current is limited to 100mA. The LT P 2884
would only be able to supply a few mA on its downstream
side if connected to a bus powered hub.
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PRODUCT MANUAL LTP2884
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
1 4 C1, C2, C3, C5 CAP, CHIP, X7R, 0.1µF, 5% , 50V, 0603 AVX, 06035C104JAT2A
2 1 C4 CAP, TANT, 100µF, 10V, 20%, C AVX, TPSC107M010R0150
3 3 D5, D6, D8 LED, GREEN, SMD, 0805 KINGBRIGHT, APT2012ZGC
4 2 D7, D9 LED, RED, SMD, 0805 KINGBRIGHT, CRCW06031R00JNEA
5 3 F1, F2, F3 PTC RESETABLE FUSE, 1.10A, 6V, 1206 BOURNS, MF-NSMF110-2
6 1 J1 USB-B RECEPTACLE, HIGH RETENTION SAMTEC, USBR-B-S-S-O-TH
7 1 J2 POWER RECEPTABLE, 2mm x 6mm CUI INC, PJ-047AH
8 1 J3 USB-A RECEPTACLE, HIGH RETENTION SAMTEC, USBR-A-S-S-O-TH
9 1 Q1 MOSFET, N-CH 30V 5.1A SC70-6 VISHAY, SI1470DH-T1-E3
10 1 Q2 MOSFET, P-CH 30V 2.7A SC70-6 VISHAY, SI1471DH-T1-E3
11 1 Q3 MOSFET, N-CH D-S 30V 8-SOIC VISHAY, SI4214DDY-T1-GE3
12 2 R1, R9 RES, CHIP, 1Ω, 5%, 1/10W, 0603 VISHAY, CRCW06031R00JNEA
13 1 R2 RES, CHIP, 1.15k, 1%, 1/10W, 0603 VISHAY, CRCW06031K15FKEA
14 1 R3 RES, CHIP, 4.42k, 1%, 1/10W, 0603 VISHAY, CRCW06034K42FKEA
15 1 R4 RES, CHIP, 5.62k, 1%, 1/10W, 0603 VISHAY, CRCW06035K62FKEA
16 1 R5 RES, CHIP, 169k, 1%, 1/10W, 0603 VISHAY, CRCW0603169KFKEA
17 1 R6 RES, CHIP, 19.6k, 1%, 1/10W, 0603 VISHAY, CRCW060319K6FKEA
18 1 R7 RES, CHIP, 100k, 1%, 1/10W, 0603 VISHAY, CRCW0603100KFKEA
19 3 R8, R10, R13 RES, CHIP, 3.65k, 1%, 1/10W, 0603 VISHAY, CRCW06033K65FKEA
20 1 R11 RES, CHIP, 0.1Ω, 1%, 1/4W, 0805 VISHAY, WSL0805R1000FEA18
21 1 R12 RES, CHIP, 100Ω, 1%, 1/10W, 0603 VISHAY, CRCW0603100RFKEA
22 6 TVS1 TO 3, 5 TO 7 DIODE TVS ARRAY, 5V, SOD323 BOURNS, CDSOD323-T05
23 1 TVS4 DIODE TVS ARRAY, 12V, SOD323 BOURNS, CDSOD323-T12
24 1 U1 IC, LTC4360-2 LINEAR LTC4360ISC8-2#PBF
25 1 U2 IC, LTC4412 LINEAR LTC4412IS6#PBF
26 1 U3 IC, LTC6108-2 LINEAR LT6108IMS8-2#PBF
27 1 U4 IC, LTC4365 LINEAR LTC4365ITS8-2#PBF
28 1 U5 IC, LTM2884 LINEAR LTM2884IY
29 1 U6 IC, LTC2906 LINEAR LTC2906ITS8#PBF
30 1 LIGHTPIPE LUMEX, LPA-C081301S-10
Optional Components
31 1 WALL ADAPTER, 12VDC. 7.2W VOLGEN, KTPS05-12006U
H352 $56520 E» E L7HWE/ég
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PRODUCT MANUAL LTP2884
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
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PRODUCT MANUAL LTP2884
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 2014
LT 0514 REV A • PRINTED IN USA
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