Datasheet Linear Technology LTC4098 — Ficha de datos

Fabricante	Linear Technology
Serie	LTC4098

Administradores de potencia de conmutación compatibles con USB / cargadores de iones de litio con protección contra sobretensiones

Hojas de datos

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PDF, 459 Kb, Revisión: C, Archivo subido: oct 22, 2017

Extracto del documento

Precios

Embalaje

	LTC4098EUDC#PBF	LTC4098EUDC#TRPBF
N	1	2
Package	3x4 QFN-20 Dibujo del esquema del paquete	3x4 QFN-20 Dibujo del esquema del paquete
Package Code	UDC	UDC
Package Index	05-08-1742	05-08-1742
Pin Count	20	20

Paramétricos

Parameters / Models	LTC4098EUDC#PBF	LTC4098EUDC#TRPBF
Battery Chemistry	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer
Demo Boards	DC1284A,DC1303A,DC1394A,DC1395A	DC1284A,DC1303A,DC1394A,DC1395A
Export Control	no	no
Features	PowerPath, Bat-Track, Overvoltage Protection	PowerPath, Bat-Track, Overvoltage Protection
Float Voltage, V	4.2V	4.2V
Max Charge Current, A	1.5	1.5
Number of Cells	1	1
Number of Outputs	1	1
Operating Temperature Range, °C	0 to 85	0 to 85
PowerPath	Switching PowerPath, 180mв„¦ Internal Ideal Diode	Switching PowerPath, 180mв„¦ Internal Ideal Diode
Type of Charger	Switching	Switching
Vin Max, V	5.5	5.5
Vin Min, V	4.35	4.35

Plan ecológico

	LTC4098EUDC#PBF	LTC4098EUDC#TRPBF
RoHS	Obediente	Obediente

Otras opciones

LTC4098-1

Notas de Diseño

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High Efficiency USB Power Management System Safely Charges Li-Ion/Polymer Batteries from Automotive Supplies &mdash DN464
PDF, 98 Kb, Archivo publicado: marzo 16, 2009
Extracto del documento
High Efficiency USB Power Management System Safely Charges
Li-Ion/Polymer Batteries from Automotive Supplies вЂ“ Design Note 464
George H. Barbehenn
In this circuit, the LTCВ®4098 USB power manager/LiIon battery charger controls an LT3480 HV step-down
regulator. The LTC4098вЂ™s Bat-Trackв„ў feature provides
a high efп¬Ѓciency, low power dissipation battery charger
from low and high voltages alike. The Bat-Track feature
controls an internal input current-limited switching regulator to regulate VOUT to approximately VBAT + 0.3V which
maximizes battery charger efп¬Ѓciency, and thus minimizes
power dissipation by operating the battery charger with
minimal headroom. Furthermore, the Bat-Track feature
reduces charge time by allowing a charge current greater
than the USB input current limitвЂ”the switching regulator
behaves like a transformer exchanging output voltage for
output current. Introduction
Automotive power systems are unforgiving electronic
environments. Transients to 90V can occur when the
nominal voltage range is 10V to 15V (ISO7637), along with
battery reversal in some cases. ItвЂ™s fairly straightforward
to build automotive electronics around this system, but
increasingly end users want to operate portable electronics, such as GPS systems or music/video players,
and to charge their Li-Ion batteries from the automotive
battery. To do so requires a compact, robust, efп¬Ѓcient …

Artículos

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Speed Up Li-ion Battery Charging and Reduce Heat with a Switching PowerPath Manager &mdash LT Journal
PDF, 263 Kb, Archivo publicado: jun 17, 2008
Extracto del documento
LINEAR TECHNOLOGY June 2008 COVER ARTICLE
Speed Up Li-ion Battery Charging
and Reduce Heat with a Switching
PowerPathв„ў Manager.1
Steven Martin Linear in the NewsвЂ¦.2
DESIGN FEATURES
Hot Swapв„ў Controller Enables
Standard Power Supplies to
Share Load .6
Vladimir Ostrerov Understanding IP2 and IP3 Issues in
Direct Conversion Receivers for
WCDMA Wide Area Basestations .10
Doug Stuetzle Complete Dual-Channel Receiver
Combines 14-Bit, 125Msps ADCs,
Fixed-Gain Amplifiers and Antialias
Filters in a Single 11.25mm Г— 15mm
ОјModuleв„ў Package.14
Todd Nelson Battery Manager Enables Integrated,
Efficient, Scalable and Testable
Backup Power Systems.17
Mark Gurries 500nA Supply Supervisors Extend
Battery Life in Portable Electronics.22
Bob Jurgilewicz Quad Output Regulator Meets Varied …
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1.2A Monolithic Buck Regulator Shrinks Supply Size and Cost with Programmable Output Current Limit &mdash LT Journal
PDF, 240 Kb, Archivo publicado: marzo 1, 2009
Extracto del documento
LвЂ‰DESIGN FEATURES 1.2A Monolithic Buck Regulator
Shrinks Supply Size and Cost with
Programmable Output Current Limit
by Tom Sheehan Introduction
Power supplies are often overqualified
for their job. This is because power
ICs often specify a current limit that
is more than twice the rated output
current of the device. The power supply
components are sized to handle the
maximum current that the IC can deliver, even if loads are unlikely to draw
that current during normal operation.
The components are bigger and more
expensive than they need to be.
There is, however, an alternative:
set an accurate maximum output current on the supply once the real world
load is known. Accurately setting the
maximum output current reduces the
required current rating of the regulatorвЂ™s power path components, thus
replacing big, expensive components
with smaller, less expensive ones.
A limit on the regulatorвЂ™s maximum output limits the maximum power
dissipation of both the supply and …

Linea modelo

Serie: LTC4098 (2)

LTC4098EUDC#PBF LTC4098EUDC#TRPBF

Clasificación del fabricante

Power Management > PMIC & Multifunction > USB Power Manager (PowerPath, Battery Charger)