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参数资料
| 型号： | NCP380HMU21AATBG |
| 厂商： | ON Semiconductor |
| 文件页数： | 16/23页 |
| 文件大小： | 622K |
| 描述： | IC CURRENT LIMIT SWITCH 6-UDFN |
| 标准包装： | 3,000 |
| 功能： | 限流 |
| 检测方法： | 高端 |
| 输入电压： | 2.5 V ~ 5.5 V |
| 电流 - 输出： | 2.1A |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-UDFN 裸露焊盘 |
| 供应商设备封装： | 6-uDFN（2x2） |
| 包装： | 带卷 (TR) |
NCP380, NCV380
http://onsemi.com
16
Reverse Voltage Protection
When the output voltage exceeds the input voltage by
V
REV
voltage during T
REV
, the reverse voltage circuitry
disconnects the output in order to protect the power supply.
The same time T
REV
is needed to turn on again the power
MOS plus a rearming time T
RREV
.
Enable Input
Enable pin must be driven by a logic signal (CMOS or
TTL compatible) or connected to the GND or VIN. A logic
low on EN
or high on EN turns-on the device. A logic high
on EN
or low on EN turns off device and reduces the current
consumption down to I
INOFF
.
Blocking Control
The blocking control circuitry switches the bulk of the
power MOS. When the part is off, the body diode limits the
leakage current I
REV
from OUT to IN. In this mode, anode
of the body diode is connected to IN pin and cathode is
connected to OUT pin. In operating condition, anode of the
body diode is connected to OUT pin and cathode is
connected to IN pin preventing the discharge of the power
supply.
APPLICATION INFORMATION
Power Dissipation
The junction temperature of the device depends on
different contributing factors such as board layout, ambient
temperature, device environment, etc... Yet, the main
contributor in terms of junction temperature is the power
dissipation of the power MOSFET. Assuming this, the
power dissipation and the junction temperature in normal
mode can be calculated with the following equations:
R
D
+ R
DS(on)
I
OUT
2
(eq. 2)
Where:
P
D
= Power dissipation (W)
R
DS(on)
= Power MOSFET on resistance (W)
I
OUT
= Output current (A)
T
J
+ P
D
R
qJA
) T
A
(eq. 3)
Where:
T
J
= Junction temperature (癈)
R
qJA
= Package thermal resistance (癈/W)
T
A
= Ambient temperature (癈)
Power dissipation in regulation mode can be calculated by
taking into account the drop V
IN
V
OUT
link to the load by
the following relation:
P
D
+
V
IN
* R
LOAD
I
OCP
I
OCP
(eq. 4)
Where:
P
D
= Power dissipation (W)
V
IN
= Input Voltage (V)
R
LOAD
= Load Resistance (W)
I
OCP
= Output regulated current (A)
Adjustable Current-Limit Programming
(for adjustable version only)
The NCP380xMUAJAA and NCP380xSNAJAA,
respectively mDFN and TSOP6 packages, are proposed to
have current limit flexibility for end Customer. Indeed, Ilim
pin is available to connect pull down resistor to ground,
which participate to the current threshold adjustment. Its
strongly recommended to use 0.1 or 1% resistor tolerance to
keep the over current accuracy.
For this resistance selection, Customer should define first
of all, the USB current to sustain, without the device enters
in the protection sequence. Main rule is to select this pull
down resistor in order to make sure min current limit is
above the USB current to provide continuously to the
upstream accessory.
Following, the main table selection contains the USB
current port for the accessory, the standard resistor selection
and typical/max over current threshold.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP380HMUAJAATBG | 功能描述:电源开关 IC - 配电 OVER CURRENT PROTECTION RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| NCP380HMUAJAGEVB | 功能描述:电源管理IC开发工具 NCP380 EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP380HSN05AAT1G | 功能描述:电源开关 IC - 配电 OVER CURRENT PROTECTION RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| NCP380HSN05AAT2G | 制造商:ON Semiconductor 功能描述:REEL / NCP380 0.5A TSOP5 T2 T&R |
| NCP380HSN05AGEVB | 功能描述:电源管理IC开发工具 NCP380 EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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