參數(shù)資料
型號(hào)： LTC4055EUF
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 電源管理
英文描述： USB Power Controller and Li-Ion Linear Charger
中文描述： 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16
封裝： 4 X 4 MM, PLASTIC, QFN-16
文件頁(yè)數(shù)： 1/24頁(yè)
文件大?。?/td> 283K
代理商： LTC4055EUF
1
LTC4055
4055p
USB Power Controller
and Li-Ion Linear Charger
I
Charges Single Cell Li-Ion Batteries Directly from
USB Port
I
Load Dependent Charging Guarantees USB Input
Current Compliance
I
Automatic Battery Switchover When Input Supply
is Removed
I
Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charging Rate
Without Risk of Overheating
I
Selectable 100% or 20% Current Limit
(e.g., 500mA/100mA)
I
Low Loss Full PowerPath
TM
Control with Ideal Diode
Operation (Reverse Current Blocking)
I
Preset 4.2V Charge Voltage with 0.8% Accuracy
I
USB Compliant Suspend Mode
I
Programmable Charge Current and Termination Timer
I
Automatic Recharge
I
Soft-Start Limits Inrush Current
I
NTC Thermistor Input for Temperature Qualified
Charging
I
Tiny (4mm
×
4mm
×
0.8mm) QFN Package
The LTC
4055 is a USB power manager and Li-Ion battery
charger designed to work in portable battery-powered
applications. The part manages and limits the total current
used by the USB peripheral for operation and battery
charging. Depending on the state of the current select pin
(HPWR), total input current can be limited to either 100mA
or 500mA. The voltage drop from the USB supply or
battery to the USB peripheral is typically less than 100mV
at 400mA and 20mV at 80mA. Other management features
include: automatic switch over to battery when input is
removed, inrush current limiting, reverse current block-
ing, undervoltage lockout and thermal shutdown.
The LTC4055 includes a complete constant-current/con-
stant-voltage linear charger for single cell Li-ion batteries.
The float voltage applied to the battery is held to a tight
0.8% (typ) tolerance, and charge current is programmable
using an external resistor to ground. Fully discharged cells
are automatically trickle charged at 10% of the pro-
grammed current until the cell voltage exceeds 2.8V. Total
charge time is programmable by an external capacitor to
ground. When the battery drops 100mV below the float
voltage, automatic recharging of the battery occurs. Also
featured is an NTC thermistor input used to monitor
battery temperature while charging.
The LTC4055 is available in a 16-pin low profile
(4mm
×
4mm) QFN package.
I
Portable USB Devices: Cameras, MP3 Players, PDAs
, LTC and LT are registered trademarks of Linear Technology Corporation.
PowerPath is a trademark of Linear Technology Corporation.
+
IN1
IN2
V
NTC
NTC
WALL
SHDN
SUSP
HPWR
TIMER PROG
OUT
BAT
Li-Ion
CELL
10
μ
F
1
10
μ
F
LTC4055
CLPROG
GND
4055 TA01
TO LDOs,
REGs, ETC
CHRG
ACPR
0.1
μ
F
100k
100k
SUSPEND USB POWER
500mA/100mA SELECT
5V (NOM)
FROM USB
CABLE V
BUS
I
LOAD
(mA)
0
C
300
400
600
500
I
IN
400
4055 TA02
200
100
–100
0
100
200
300
600
I
(IDEAL DIODE)
500
I
CHARGING
I
LOAD
High Power/Full Charge
R
PROG
= R
CLPROG
= 100k
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
Electrical Specifications Subject to Change
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4055EUF#PBF 功能描述:IC USB PWR MNGR BATT CHRGR 16QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關(guān)文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標(biāo)準(zhǔn)包裝:4,000 系列:- 功能:燃料，電量檢測(cè)計(jì)/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱(chēng):497-10526-2
LTC4055EUF#TR 功能描述:IC USB PWR MNGR BATT CHRGR 16QFN RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤(pán) 包裝:管件
LTC4055EUF#TRPBF 功能描述:IC USB PWR MNGR BATT CHRGR 16QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤(pán) 包裝:管件
LTC4055EUF-1#PBF 功能描述:IC USB PWR MNGR BATT CHRGR 16QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤(pán) 包裝:管件
LTC4055EUF-1#TRPBF 功能描述:IC USB PWR MNGR BATT CHRGR 16QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤(pán) 包裝:管件
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