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参数资料
| 型号： | FPF2165 |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC LOAD SWITCH ADJ CURR 6-MLP |
| 标准包装： | 1 |
| 类型： | 高端开关 |
| 输出数： | 1 |
| Rds（开）： | 160 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 可调 |
| 输入电压： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WDFN 裸露焊盘 |
| 供应商设备封装： | 6-MicroFET（2x2） |
| 包装： | 标准包装 |
| 其它名称： | FPF2165DKR |
Application Information
Typical Application
FPF2163/4/5
Battery
V IN
V OUT
FLAGB
LOAD
1.8V-5.5V
OFF ON
ON
ISET
R2 = 499 ?
GND
C2 = 0.1μF
C1 = 4.7μF
R SET
Setting Current Limit
The FPF2163, FPF2164, and FPF2165 have a current limit
which is set with an external resistor connected between ISET
and GND. This resistor is selected by using the following
Input Capacitor
To limit the voltage drop on the input supply caused by transient
in-rush currents when the switch is turned on into a discharged
load capacitor or a short-circuit, a capacitor needs to be placed
equation,
R SET =
275.6
I LIM
(1)
between V IN and GND. A 4.7μF ceramic capacitor, C IN , must be
placed close to the V IN pin. A higher value of C IN can be used to
further reduce the voltage drop experienced as the switch is
turned on into a large capacitive load.
R SET is in Ohms and that of I LIM is Amps
The table below can also be used to select R SET . A typical
application would be the 500mA current that is required by a
single USB port. Using the table below an appropriate selection
for the R SET resistor would be 394 ? . This will ensure that the
port load could draw 525mA, but not more than 875mA.
Likewise for a dual port system, an R SET of 185 ? would always
deliver at least 1125mA and never more than 1875mA
Output Capacitor
A 0.1uF capacitor C OUT , should be placed between V OUT and
GND. This capacitor will prevent parasitic board inductances
from forcing V OUT below GND when the switch turns-off. For the
FPF2163 and FPF2164, the total output capacitance needs to
be kept below a maximum value, C OUT (max), to prevent the
part from registering an over-current condition and turning-off
the switch. The maximum output capacitance can be
determined from the following formula,
Current Limit Various R SET Values
R SET Min. Current Typ. Current
[ ? ] Limit Limit
[mA]
[mA]
Max. Current
Limit
[mA]
C OUT (max) =
I LIM (max) x t BLANK (min)
V IN
(2)
185
220
275
306
1125
938
750
675
1500
1250
1000
900
1875
1562
1250
1125
Power Dissipation
During normal operation as a switch, the power dissipated in the
part will depend upon the level at which the current limit is set.
The maximum allowed setting for the current limit is 1.5A and
this will result in a power dissipation of,
345
394
600
525
800
700
1000
875
P = (I LIM ) 2 x R DS = (1.5) 2 x 0.12 = 270mW
(3)
t BLANK
460
550
610
690
790
920
1100
1380
1830
FPF2163/4/5 Rev. I
450
375
338
300
263
225
188
150
113
600
500
450
400
350
300
250
200
150
750
625
563
500
438
375
313
250
188
10
If the part goes into current limit the maximum power dissipation
will occur when the output is shorted to ground. For the
FPF2163, the power dissipation will scale by the Auto-Restart
Time, t RSTRT , and the Over Current Blanking Time, t BLANK , so
that the maximum power dissipated is,
P(max) = x V IN (max) x I LIM (max)
t BLANK + t RSTRT
30
= x 5.5 x 1.5 = 515.6mW (4)
30 + 450
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FPF2165_SBAA013 | 制造商:Fairchild Semiconductor Corporation 功能描述:FULL FUNCTION LOAD SWITCH - Tape and Reel |
| FPF2165R | 功能描述:开关 IC - 各种 Full Func Load Swtch w/Adj Curr Limit RoHS:否 制造商:Fairchild Semiconductor 开启电阻（最大值）: 电源电压-最大:4.4 V 电源电压-最小:2.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WLCSP-9 封装:Reel |
| FPF2165SBAA013 | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FPF2172 | 功能描述:开关 IC - 各种 LOW_VOLTAGE RoHS:否 制造商:Fairchild Semiconductor 开启电阻（最大值）: 电源电压-最大:4.4 V 电源电压-最小:2.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WLCSP-9 封装:Reel |
| FPF2172_08 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:IntelliMAXa?￠ Advanced Load Management Products |
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