- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44989 > LTC2942CDCB#TRPBF (LINEAR TECHNOLOGY CORP) POWER SUPPLY SUPPORT CKT, PDSO6 PDF資料下載
參數(shù)資料
| 型號： | LTC2942CDCB#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | 2 X 3 MM, LEAD FREE, PLASTIC, MO-229, DFN-6 |
| 文件頁數(shù)： | 16/18頁 |
| 文件大?。?/td> | 227K |
| 代理商： | LTC2942CDCB#TRPBF |
LTC2942
7
2942fa
operaTion
Overview
The LTC2942 is a battery gas gauge device designed for
use with single Li-Ion cells and other battery types with a
terminalvoltageat2.7Vto5.5V.Itmeasuresbatterycharge
and discharge, battery voltage and chip temperature.
A precision coulomb counter integrates current through a
sense resistor between the battery’s positive terminal and
theloadorcharger.Batteryvoltageandon-chiptemperature
are measured with an internal 14-bit/10-bit ADC.
Coulomb Counter
Charge is the time integral of current. The LTC2942 mea-
sures battery current by monitoring the voltage developed
acrossasenseresistorandthenintegratesthisinformation
to infer charge. The differential voltage between SENSE+
andSENSE–isappliedtoanauto-zeroeddifferentialanalog
integrator to convert the measured current to charge.
When the integrator output ramps to REFHI or REFLO
levels, switches S1, S2, S3 and S4 toggle to reverse the
ramp direction. By observing the condition of the switches
and the ramp direction, polarity is determined.
Aprogrammableprescalereffectivelyincreasesintegration
time by a factor M programmable from 1 to 128. At each
underflow or overflow of the prescaler, the accumulated
chargeregister(ACR)valueisincrementedordecremented
one count. The value of accumulated charge is read via
the I2C interface.
Voltage and Temperature ADC
The LTC2942 includes a 14-bit No Latency
Σ analog-to-
digital converter, with internal clock and voltage reference
circuits.
The ADC can either be used to monitor the battery voltage
at SENSE– or to convert the output of the on-chip tempera-
turesensor.Thesensorgeneratesavoltageproportionalto
temperature with a slope of 2.5mV/K resulting in a voltage
of 750mV at 27°C.
Conversion of either temperature or voltage is triggered
by setting the control register via the I2C interface. The
LTC2942 features an automatic mode where a voltage and
atemperatureconversionareexecutedeverytwoseconds.
At the end of each conversion the corresponding registers
are updated and the converter goes to sleep to minimize
quiescent current.
+
LOAD
CHARGER
RSENSE
BATTERY
IBAT
–
+
–
+
–
+
S4
REFHI
REFLO
S3
S2
S1
VCC
SENSE+
1
SENSE–
6
GND
2
POLARITY
DETECTION
CONTROL
LOGIC
M
PRESCALER
ACR
2942 F02
Figure 2. Coulomb Counter Section of the LTC2942
相關PDF資料 |
PDF描述 |
|---|---|
| LTC2990CMS#PBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| LTC2990CMS#TR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| LTC2990IMS#PBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| LTC2990IMS | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| LTC2990IMS#TR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2942IDCB#PBF | 制造商:Linear Technology 功能描述:BATTERY GAS GAUGE LI-ION 5.5V DFN-6 制造商:Linear Technology 功能描述:BATTERY GAS GAUGE, LI-ION, 5.5V, DFN-6 制造商:Linear Technology 功能描述:BATTERY GAS GAUGE, LI-ION, 5.5V, DFN-6, Battery Management Function:Fuel Gauge, Status Monitor, Battery Type:Li-Ion, Supply Voltage Min:2.7V, Supply Voltage Max:5.5V, Battery IC Case Style:DFN, No. of Pins:6, MSL:MSL 1 - Unlimited , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:MS-System Monitor/Other, Cut Tape Battery Gas Gauge with Temperature & Voltage M |
| LTC2942IDCB#TRMPBF | 功能描述:IC FUEL/GAS GAUGE LI-ION 6DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標準包裝:4,000 系列:- 功能:燃料，電量檢測計/監(jiān)控器 電池化學:鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2 |
| LTC2942IDCB#TRPBF | 功能描述:IC FUEL/GAS GAUGE LI-ION 6DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學: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 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC2942IDCB-1#PBF | 制造商:Linear Technology 功能描述:BATTERY FUEL GAUGE LI-ION 5.5V DFN-6 制造商:Linear Technology 功能描述:IC, BATTERY FUEL GAUGE, LI-ION, 5.5V, DFN-6, Battery Management Function:Fuel Gauge, Charge Controller, Battery Type:Li-Ion, Supply Voltage Min:2.7V, Supply Voltage Max:5.5V, Battery IC Case Style:DFN, No. of Pins:6 , RoHS Compliant: Yes |
| LTC2942IDCB-1#PBF | 制造商:Linear Technology 功能描述:IC BATTERY FUEL GAUGE LI-ION 5.5V DFN-6 |
發(fā)布緊急采購，3分鐘左右您將得到回復。