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参数资料
| 型号： | LTC4155EUFD#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PQCC28 |
| 封装： | 5 X 4 MM, 0.75 MM HEIGHT, PLASTIC, MO-220WXXX-X, QFN-28 |
| 文件页数： | 17/52页 |
| 文件大小： | 473K |
| 代理商： | LTC4155EUFD#TRPBF |
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LTC4155
24
4155f
Figure 4. Ship-and-Store Mode Required Components
to Enforce Downstream (VOUT) Shutdown
CHGSNS
BATSNS
BATGATE
LTC4155
4155 F04
+
Low Power Ship-and-Store Mode
The LTC4155 can reduce its already low standby current
to approximately 1A in a special mode designed for
shipment and storage. Unlike normal standby mode, in
this mode the external PMOS gate is driven to the battery
voltage to disable FET conduction through the external
PMOS. This mode may be used to cut off all power to
any downstream load on VOUT to maximize battery life
between product manufacture and sale. Note that the bulk
connection inside the external PMOS will provide a con-
ductive path from the battery to VOUT, independent of the
voltage on its gate. To block conduction to VOUT, typically
two PMOS transistors must be connected in series with
either the sources or drains of each device connected in
the center, as shown in Figure 4. If the application does
not require the battery to be isolated from downstream
devices, significant power savings in the LTC4155 may
still be realized by activating this mode.
Ship-and-store mode is armed following the acknowledge
of any data byte written to sub address 0x07 by the I2C
bus master, and activated upon the removal of power to
the USB and WALL inputs, or immediately if no input
power is present when the I2C command is issued. The
contents of the data byte are ignored, but the full byte and
acknowledge clock cycle must be sent.
Once engaged, ship-and-store mode can be disengaged
by applying power to the USB or WALL input or by writ-
ing any full data byte and acknowledge clock cycle to sub
address 0x06 if the I2C bus master is still powered.
I2C Interface
The LTC4155 may communicate with a bus master using
the standard I2C 2-wire interface. The Timing Diagram
shows the relationship of the signals on the bus. The two
bus lines, SDA and SCL, must be HIGH when the bus is
not in use. External pull-up resistors or current sources,
such as the LTC1694 SMBus accelerator, are required
on these lines. The LTC4155 is both a slave receiver and
slave transmitter. The I2C control signals, SDA and SCL,
are scaled internally to the DVCC supply. DVCC should be
connected to the same power supply as the bus pull-up
resistors.
The I2C port has an undervoltage lockout on the DVCC pin.
When DVCC is below approximately 1V, the I2C serial port
is cleared, the LTC4155 is set to its default configuration,
pending interrupts will be cleared, and future interrupts
will be disabled.
Bus Speed
The I2C port is designed to operate at speeds of up to
400kHz. It has built-in timing delays to ensure correct
operation when addressed from an I2C compliant master
device. It also contains input filters designed to suppress
glitches.
START and STOP Conditions
A bus master signals the beginning of communications
by transmitting a START condition. A START condition is
generated by transitioning SDA from HIGH to LOW while
SCL is HIGH. The master may transmit either the slave
write or the slave read address. Once data is written to the
LTC4155,themastermaytransmitaSTOPconditionwhich
commands the LTC4155 to act upon its new command set.
A STOP condition is sent by the master by transitioning
SDA from LOW to HIGH while SCL is HIGH.
OPERATION
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相关代理商/技术参数 |
参数描述 |
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| LTC4155IUFD#PBF | 功能描述:IC I2C POWER MANAGER DUAL 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:PowerPath™ 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4155IUFD#TRPBF | 功能描述:IC I2C POWER MANAGER DUAL 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:PowerPath™ 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4156EUFD#PBF | 功能描述:IC POWER LI-ION CHARGER 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:* 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LTC4156EUFD#TRPBF | 功能描述:IC POWER LI-ION CHARGER 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4156IUFD#PBF | 功能描述:IC POWER LI-ION CHARGER 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:* 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
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