参数资料
| 型号： | LTC4415EMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/20页 |
| 文件大小： | 0K |
| 描述： | IC DUAL 4A DIODES 16-MSOP |
| 标准包装： | 37 |
| 系列： | PowerPath™ |
| 应用： | 备用电池，高电流开关 |
| FET 型： | P 沟道 |
| 输出数： | 2 |
| 内部开关： | 是 |
| 电源电压： | 1.7 V ~ 5.5 V |
| 电流 - 电源： | 44µA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TFSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 16-MSOP |
| 包装： | 管件 |
LTC4415
TYPICAL APPLICATIONS
Load Sharing by Multiple Batteries and Automatic
Switchover to a Preferred Power Supply
(Such as a Wall Adapter)
An application circuit for dual battery load sharing with
automatic switchover to a wall adapter (when present)
is shown in Figure 8. In the absence of the wall adapter,
the higher voltage battery provides the load current until
it has discharged to the voltage of the other battery. The
load is then shared between the two batteries according
to their capacities, the higher capacity battery providing
proportionally higher current to the load unless limited
by its current limit.
When a wall adapter is applied, the output voltage rises
as the body diode of PFET MP1 conducts and both of the
ideal diode paths in the LTC4415 stop conducting due to
reverse turn-off. At this time, the wired-OR status signal
pulls up the gate voltage of NFET MN1, pulling down the
gate voltage of power PFET MP1, turning it on. The wired-OR
status signal indicates whether the wall adapter or either
of the two batteries is supplying the load current. The two
application circuits described in Figure 7 and Figure 8 can
be cascaded for dual battery charging and load sharing.
WALL ADAPTER
MP1 IRFHS9301
Microcontrolled Power Switch with Reverse Blocking,
Selectable Current Limit, Soft-Start and Monitoring
Figure 9 illustrates an application circuit for microcon-
troller monitoring and control of two power sources. The
microcontroller monitors the input supply voltages and
commands the LTC4415 through EN1/ EN2 inputs.
Currents through the ideal diodes are monitored by the
microcontroller measuring CLIM1/CLIM2 pin voltages
using ADCs. The current limit can be adjusted for either
diode using an external FET as shown in this application
for diode 1 with MN1. The two ideal diode outputs are
connected together for power source ORing, or they may
feed different loads.
Parallel Diodes for Lower Resistance or Higher
Current Output
The two ideal diodes in the LTC4415 can be connected in
parallel as shown in Figure 10 to achieve a low resistance
PowerPath. The master enable input, ENABLE , turns on
diode 2. EN1 is tied to the output so that diode 1 conducts
only after the output has charged up (by diode 2 according
to its current limit setting). Diode 1 is disabled when the
IN1
OUT1
BAT1
+
IDEAL
LTC4415
EN1
CLIM1 STAT1
CLIM2 WARN1
WARN2
STAT2
STAT
470k 470k
MN1 IRLML2402
4.7μF
V OUT1
3.3V
0.8A
1.0M
4.7 μH
PV IN1 V IN PV IN2
SW1A SW2
SW1B
FB2
V OUT1
LTC3521
4.7μH
137k
68.1k
V OUT2
1.8V
10μF 0.6A
BAT2
+
EN2
IN2
IDEAL
GND
OUT2
221k ON
OFF
PWM
BURST
FB1
SHDN1
SHDN2
SHDN3
PWM
PGND1A
SW3
FB3
PGOOD1
PGOOD2
PGOOD3
4.7μH
100k
100k
V OUT3
1.2V
10μF 0.6A
PGND1B GND PGND2
4415 F08
Figure 8. Dual Battery Load Sharing with Automatic Switchover to a Wall Adapter
4415fa
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4415IDHC#PBF | 功能描述:IC DUAL 4A DIODES 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:PowerPath™ 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
| LTC4415IDHC#TRPBF | 功能描述:IC DUAL 4A DIODES 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:PowerPath™ 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
| LTC4415IMSE#PBF | 功能描述:IC DUAL 4A DIODES 16-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:PowerPath™ 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
| LTC4415IMSE#TRPBF | 功能描述:IC DUAL 4A DIODES 16-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:PowerPath™ 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
| LTC4416EMS | 制造商:Linear Technology 功能描述:OR Controller P-Channel Dual-OUT 10-Pin MSOP |
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