參數(shù)資料
型號(hào)： LTC1760CFW
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： Dual Smart Battery System Manager
中文描述： 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO48
封裝： 6.10 MM, PLASTIC, TSSOP-48
文件頁(yè)數(shù)： 27/44頁(yè)
文件大?。?/td> 379K
代理商： LTC1760CFW
LTC1760
27
sn1760 1760is
4 System Power Management Algorithm and Battery
Calibration
4.1 Turning Off System Power
The LTC1760 allows the user to turn off system power
using the LTC(POWER_OFF) bit. When POWER_OFF is
asserted high all power management functions are by-
passed and the LTC1760 will turn off DCIN, BAT2 and
BAT1 power paths. This feature allows the user to power
down the system. Charging is still allowed when
POWER_OFF is asserted high.
4.2 Power-By Algorithm When No Battery is Being
Calibrated
The LTC1760 will always attempt to maintain system
power. The preferred configuration is to remain in 3- Diode
mode. In 3-Diode mode, power will be provided by BAT1,
BAT2 and DCIN with the source at the highest voltage
potential automatically providing all the power. Sources at
similar voltage potentials will share power based on their
capacity.
The following conditions will cause the LTC1760 to modify
its preferred power-by algorithm.
1. A battery issues a terminate discharge alarm and
AC_PRESENT is high. The LTC1760 will select the other
battery and DCIN to power the system.
2. A battery issues a terminate discharge alarm and
AC_PRESENT is low. The LTC1760 will select the other
battery to power the system.
3. A battery issues a terminate discharge alarm,
AC_PRESENT is low, and the other battery is not present
or has previously alarmed. The LTC1760 will autono-
mously try to restore power by entering 3-Diode mode.
The 3-Diode mode will ignore TERMINATE_DISCHARGE
and FULLY_DISCHARGED alarms.
4.3 Power-By Algorithm When a Battery is Being
Calibrated
During battery calibration, the battery being calibrated is
the only device powering the system. This will be reflected
in the reported POWER_BY[4:1] bits. See “Section 5” for
more information on battery calibration.
4.4 Power-By Reporting
The following tables illustrate how BatterySystem
State(POWER_BY_BAT[4:1]) interprets power path
conditions.
OPERATIOU
Power Reporting for Batteries Being Calibrated
AC_PRESENT CALIBRATE_BAT2 CALIBRATE_BAT2 POWER_BY_BAT[4:1]
1
0
1
0
1
1
*States not shown are not allowed
0
1
0
'b0000
'b0001
'b0010
AC_PRESENT PRESENT_BAT2 PRESENT_BAT1 POWER_BY_BAT[4:1]
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
1
0
1
0
1
0
1
'b0000
'b0001
'b0010
'b0011
'b0000
'b0000
'b0000
'b0000
Power Reporting with AC_PRESENT Low and both Batteries
Present, as a Function of Power Alarms.
BATTERY 2
POWER ALARM POWER ALARM
AC_PRESENT
(NOTE 1)
0
0
0
0
0
1
0
1
1
X
BATTERY 1
(NOTE 1)
0
1
0
1
X
POWER_BY_BAT[4:1]
'b0011
'b0010
'b0001
'b0011
'b0000
Note 1: A power alarm means that ALARM() has returned
TERMINATE_DISCHARGE=1 or FULLY_DISCHARGED_ALARM=1
Power Reporting When
BatterySystemStateCont(POWER_NOT_GOOD) is High
and the LTC1760 has Autonomously Entered 3-Diode Mode
Power Reporting as a Function of Battery Presence
AC_PRESENT PRESENT_BAT2 PRESENT_BAT1 POWER_BY_BAT[4:1]
1
X
0
0
0
0
0
1
0
1
X
0
1
0
1
'b0000
'b0000
'b0001
'b0010
'b0011
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1760CFW#PBF 功能描述:IC MANAGER BATTERY DUAL 48TSSOP RoHS:是 類別: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:497-10526-2
LTC1760CFW#PBF 制造商:Linear Technology 功能描述:Battery Management IC 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, 4.28A, TSSOP-48
LTC1760CFW#TR 功能描述:IC MANAGER BATTERY SYS 48-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)
LTC1760CFW#TRPBF 功能描述:IC MANAGER BATTERY DUAL 48TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)
LTC1760CFWPBF 制造商:Linear Technology 功能描述:Dual Smart Battery Sys. Manager TSSOP48
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