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参数资料
| 型号： | LTC1732EMS-8.4#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/12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
APPLICATIO N S I N FOR M ATIO N
V +
V DD
ACPR Output Pin
8
V CC
400k
μ PROCESSOR
The LTC1732-8.4 has an ACPR output pin to indicate that
the input supply (wall adapter) is higher than 8.2V and
CHRG
LTC1732-8.4
3
2k
OUT
IN
55mV above the voltage at the BAT pin. When both
conditions are met, the ACPR pin is pulled to ground by an
N-channel MOSFET that is capable of driving an LED.
1732-8.4 F01
Figure 1. Microprocessor Interface
Table 1. Microprocessor Interface
Otherwise, this pin is high impedance.
CHRG Status Output Pin (C/10)
The LTC1732-8.4 includes a comparator to monitor the
charge current to detect a near end-of-charge condition.
IN
LOW
LOW
HIGH
OUT
HIGH
Hi-Z
Hi-Z
CHARGE STATUS
Charge
C /10
Stop Charging
This comparator does not terminate the charge cycle, but
provides an output signal to indicate a near full charge
condition. The timer is used to terminate the charge cycle.
When the battery current falls below 10% of full scale, the
When the LTC1732-8.4 is in charge mode, the CHRG pin
is pulled low by an internal N-channel MOSFET. To detect
this mode, force the digital output pin, OUT, high and
measure the voltage at the CHRG pin. The N-channel
MOSFET will pull the pin low even with a 2k pull-up
resistor. Once the charge current drops to 10% of the full-
scale current ( C /10), the N-channel MOSFET is turned off
and a 35 μ A current source is connected to the CHRG pin.
The IN pin is then pulled high by the 2k pull-up. By forcing
the OUT pin into a high impedance state, the current
source pulls the pin low through the 400k resistor. When
the internal timer has expired, the CHRG pin changes to
high impedance and the 400k resistor pulls the pin high to
indicate that charging has stopped.
comparator trips and turns off the N-channel MOSFET at
the CHRG pin and switches in a 35 μ A current source to
ground. After an internal time delay of 15ms, this state is
latched. This delay helps prevent false triggering due to
transient currents. The end-of-charge comparator is dis-
abled in trickle charge mode.
Gate Drive
Typically the LTC1732-8.4 controls an external P-channel
MOSFET to supply current to the battery. An external PNP
transistor can also be used as the pass transistor instead
of the P-channel MOSFET. Due to the low current gain of
the current amplifier (CA), a high gain Darlington PNP
transistor is required to avoid excessive charge current
error. The gain of the current amplifier is around 0.6 μ A/
mV. For every 1 μ A of base current, a 1.6mV of gain error
shows up at the inputs of CA. With R PROG = 19.6k (100mV
across R SENSE ), it represents 1.67% of error in charging
current.
17328f
9
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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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