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参数资料
| 型号： | LTC1732EMS-8.4#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC BATTCHRG CNTRLR LI-ION 10MSOP |
| 标准包装： | 50 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子，镍镉，镍氢 |
| 电源电压： | 4.5 V ~ 12 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 1340 (CN2011-ZH PDF) |
LTC1732-8.4
OPERATIO
The LTC1732-8.4 is a linear battery charger controller. The
charge current is programmed by the combination of a
program resistor (R PROG ) from the PROG pin to ground
and a sense resistor (R SENSE ) between the V CC and SENSE
pins. R PROG sets a program current through an internal
trimmed 800 ? resistor setting up a voltage drop from V CC
to the input of the current amplifier (CA). The current
amplifier servos the gate of the external P-channel MOSFET
to force the same voltage drop across R SENSE which sets
the charge current. When the voltage at the BAT pin
approaches the preset float voltage, the voltage amplifier
(VA) will start sinking current which shrinks the voltage
drop across R SENSE , thus reducing the charge current.
A charge cycle begins when the potential at V CC pin rises
above the UVLO level and a program resistor is connected
from the PROG pin to ground. At the beginning of the
charge cycle, if the battery voltage is below 4.9V, the
charger goes into trickle charge mode. The trickle charge
current is 10% of the full-scale current. If the battery
voltage stays low for one quarter of the total charge time,
the charge sequence will terminate.
The charger goes into the fast charge constant-current
mode after the voltage on the BAT pin rises above 4.9V. In
constant-current mode, the charge current is set by the
combination of R SENSE and R PROG .
When the battery approaches the final float voltage, the
charge current will begin to decrease. When the current
drops to 10% of the full-scale charge current, an internal
An external capacitor on the TIMER pin sets the total
charge time. After a time-out occurs, the charge cycle is
terminated and the CHRG pin is forced to a high imped-
ance state. To restart the charge cycle, remove the input
voltage and reapply it, or float the PROG pin momentarily.
Replacing the battery while in the charge mode will cause
the timer to be reset if the voltage of the new battery is
below 8.05V. If the voltage is above 8.05V, the timer will
continue for the remaining charge time. In the case when
a time out has occurred, a new battery with a voltage of
less than 8.05V can be inserted and charged automatically
with the full programmed charge time.
For batteries like lithium-ion that require accurate final
float voltage, the internal 2.457V reference, voltage ampli-
fier and the resistor divider provide regulation with ± 1%
(max) accuracy. For NiMH and NiCd batteries, the
LTC1732-8.4 can be used as a current source by pulling
the TIMER pin to V CC . When in the constant-current only
mode, the voltage amplifier, timer, C /10 comparator and
the trickle charge function are all disabled.
The charger can be shut down by floating the PROG
pin(I CC ≈ 1mA). An internal current source will pull this pin
high and clamp it at 3.5V.
When the input voltage is not present, the charger goes
into a sleep mode, dropping I CC to 10 μ A. This greatly
reduces the current drain on the battery and increases the
standby time.
comparator will turn off the pull-down N-channel MOSFET
at the CHRG pin and connect a weak current source to
ground to indicate an end-of-charge ( C /10) condition.
17328f
7
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| LTC1733EMSE | 功能描述:IC CHRGR BATT MONO THERML 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC1733EMSE#PBF | 功能描述:IC CHRGR BATT MONO THERML 10MSOP 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 |
| LTC1733EMSE#PBF | 制造商:Linear Technology 功能描述:Battery Management IC |
| LTC1733EMSE#TR | 功能描述:IC CTRLR BATT CHRG LI-ION 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC1733EMSE#TRPBF | 功能描述:IC CHRGR BATT MONO THERML 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
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