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参数资料
| 型号： | LTC4355CMS#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件页数： | 2/20页 |
| 文件大小： | 249K |
| 代理商： | LTC4355CMS#PBF |
LTC4355
10
4355fe
APPLICATIONS INFORMATION
Loop Stability
The servo loop is compensated by the parasitic capaci-
tance of the power N-channel MOSFET. No further
compensation components are normally required. In
the case when a MOSFET with less than 1000pF gate
capacitance is chosen, a 1000pF compensation capacitor
connected across the gate and source pins might be
required.
Design Example
Thefollowingdesignexampledemonstratesthecalculations
involved for selecting components in a 36V to 72V system
with 5A maximum load current (see Figure 2).
First, choose the N-channel MOSFET. The 100V, FDS3672
in the SO-8 package with RDS(ON) = 22mΩ(max) offers a
good solution. The maximum voltage drop across it is:
ΔV = 5A 22mΩ = 110mV
The maximum power dissipation in the MOSFET is a mere:
P = 5A 110mV = 0.55W
Next, select the resistive dividers that guarantee the
PWRFLT pins will not assert when the input supplies are
above 36V. The maximum VMONx(TH) is 1.245V and the
maximum IMONx(IN) is 1μA. Choose a 1% tolerance resistor
R1 = 12.7k. Then,
I
R2 =
V
MONx(TH)
R1(MIN)
+I
MONx (TH)(MAX)
=
1.245V
12.7k
Ω(1%)
+ 1μA = 100μA
Use IR2 to choose R2.
R2
=
36V
1.245V
100
μA
= 348kΩ
Adjust R2 down by 1% to 344k to account for its tolerance.
The next lower standard resistor value is R2 = 340k.
The LED D1, a Panasonic Green LN1351C, requires at least
1mA of current to fully turn on. Therefore, R5 is set to 33k
to accommodate the lowest input supply voltage of 36V.
4355 F02
LTC4355
GND
GATE1
GATE2
IN1
OUT
IN2
MON1
MON2
SET
R1
12.7k
R2
340k
R3
12.7k
R4
340k
R5
33k
R7
33k
R9
33k
R6
33k
R8
33k
D1
D3
D2
D4
D5
GND
M1
FDS3672
M2
FDS3672
TO
LOAD
VIN1 = +48V
VIN2 = +48V
VDSFLT
FUSEFLT1
FUSEFLT2
PWRFLT1
PWRFLT2
F1
7A
F2
7A
GREEN LEDs
PANASONIC LN1351C
Figure 2. 36V to 72V/5A Design Example
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4355CS#PBF | 功能描述:IC IDEAL DIODE-OR 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:- 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) |
| LTC4355CS#TRPBF | 功能描述:IC IDEAL DIODE-OR 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:- 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) |
| LTC4355HMS#PBF | 制造商:Linear Technology 功能描述:IC OR CTRLR SRC SELECT 16MSOP 制造商:Linear Technology 功能描述:IC, DIODE-OR CONTROLLER, MSOP-16 制造商:Linear Technology 功能描述:DIODE-OR CONTROLLER, 80V, MSOP-16, IC Function:Diode-OR Controller, Brief Features:-, Supply Voltage Min:9V, Supply Voltage Max:80V, Operating Temperature Min:-40C, Operating Temperature Max:125C, Digital IC Case Style:MSOP, MSL:- , RoHS Compliant: Yes |
| LTC4355HMS#TRPBF | 制造商:Linear Technology 功能描述:IC OR CTRLR N+1 8MSOP 制造商:Linear Technology 功能描述:IC OR CTRLR SRC SELECT 16MSOP 制造商:Linear Technology 功能描述:DIODE-OR CONTROLLER, 80V, MSOP-16, IC Function:Diode-OR Controller, Brief Features:-, Supply Voltage Min:9V, Supply Voltage Max:80V, Operating Temperature Min:-40C, Operating Temperature Max:125C, Digital IC Case Style:MSOP, MSL:- , RoHS Compliant: Yes |
| LTC4355IDE#PBF | 功能描述:IC IDEAL DIODE-OR 14-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:- 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) |
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