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| 型号： | LTM8061EV-8.4#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/22页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY CHARGER 8.4V 77-LGA |
| 产品培训模块： | LTM806x Step-Down Micro-Module Battery Charger |
| 设计资源： | DC1645A Design Files |
| 特色产品： | μModule Products |
| 标准包装： | 170 |
| 系列： | µModule® |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4.95 V ~ 32 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 77-BLGA |
| 供应商设备封装： | 77-LGA（15x9） |
| 包装： | 托盘 |
| 配用： | DC1645A-D-ND - BOARD EVAL LTM8061-8.4 |
LTM8061
APPLICATIONS INFORMATION
1.5A
+
A 1.5A system limit, for example, would use a 33mΩ sense
resistor. Figure 4 gives an example of the system current
for the situation where the input current happens to be
1A, and then gets reduced as the additional system load
increases beyond 0.5A. The LTM8061 integrates the CLP
signal internally, so average current limiting is performed
in most cases without the need for external filter elements.
SYSTEM LOAD
CURRENT
LTM8061 INPUT
CURRENT (I VIN )
1.0A
0.5A
8061 F04
Figure 4. LTM8061 Input Current vs System
Load Current with 1.5A Input Current Limit
RNG/SS: Dynamic Charge Current Adjust
The LTM8061 gives the user the capability to reduce the
maximum charge current dynamically through the RNG/
SS pin. The maximum charge current of the LTM8061 is
2A and the control voltage range on the RNG/SS pin is
1V, so the maximum charge current can be expressed as:
I BAT = 2A ? V RNG/SS
where I BAT is the maximum charge current and V RNG/SS is
between 0V to 1V. Voltages higher than 1V have no effect
on the maximum charge current.
The LTM8061 sources 50μA from the RNG/SS pin, such
that a current control voltage can be set by simply connect-
ing an appropriately valued resistor to ground, following
the equation:
For example, to reduce the maximum charge current to
50% of the original value, set RNG/SS to 0.5V. The neces-
sary resistor value is:
R RNG/SS = 0.5V/50μA = 10kΩ
This feature could be used, for example, to switch in a
reduced charge current level. Applying an active voltage
can also be used to control the maximum charge current
but only if the voltage source can sink current. Figures 5
and 6 give two examples of circuits that control the charg-
ing current by sinking current. Active circuits that source
current cannot be used to drive the RNG/SS pin. Care
must be taken not to exceed the 2.5V absolute maximum
voltage on the pin.
LTM8061
RNG/SS
10k
8061 F05
LOGIC HIGH = HALF CURRENT
Figure 5. Using the RNG/SS Pin for Digital Control of
Maximum Charge Current
LTM8061
RNG/SS
8061 F06
– SERVO REFERENCE
Figure 6. Driving the RNG/SS Pin with a
Current-Sink Active Servo Amplifier
R RNG/SS = V RNG/SS /50μA
8061fa
For more information www.linear.com/LTM8601
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM8061IV-4.1#PBF | 功能描述:IC BATTERY CHARGER 4.1V 77-LGA RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:µModule® 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) |
| LTM8061IV-4.1PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:32V, 2A μModule Li-Ion/ Polymer Battery Charger |
| LTM8061IV-4.2#PBF | 功能描述:IC BATTERY CHARGER 4.2V 77-LGA RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:µModule® 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) |
| LTM8061IV-4.2PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:32V, 2A μModule Li-Ion/ Polymer Battery Charger |
| LTM8061IV-8.2#PBF | 功能描述:IC BATTERY CHARGER 8.2V 77-LGA RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:µModule® 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) |
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