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參數(shù)資料
| 型號(hào)： | NIS5102QP1HT1G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 電源管理 |
| 英文描述： | High Side SMART HotPlug IC/Inrush Limiter/Circuit Breaker |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, DSO12 |
| 封裝： | 9 X 9 MM, LEAD FREE, PLLP-12 |
| 文件頁(yè)數(shù)： | 11/14頁(yè) |
| 文件大小： | 150K |
| 代理商： | NIS5102QP1HT1G |
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NIS5102
http://onsemi.com
11
V
CC
R
OVLO
300 k
OVLO
200 k
Ground
Source
Figure 19. Equivalent Overvoltage Lockout Circuit
2 M
7 V
The theoretical equation for the OVLO turnon voltage is:
300 Vin
ROVLO(K )
2100
Vin
21.8
The OVLO trip point voltage calculated through the
theoretical formula may show small variations with respect
to Figure 4, therefore it is recommended to use the formulas
gotten from the OVLO characterization, which are shown
below:
e[(OVLO
ROVLO(k )
where “OVLO” is the desired overvoltage lockout value,
and R
OVLO
is the programming resistor from the OVLO pin
to the V
CC
pin.
To reduce nuisance tripping due to transients and noise
spikes, a capacitor may be added from the OVLO pin to
ground. This will create a low pass filter with a cutoff
frequency of f. The required capacitance on this pin is:
(8.83 E6· ROVLO)]
2 · f · ROVLO
This pin is also used as a common shutdown pin. In this
mode, if this pin is pulled to ground, it will shutdown the chip
and all chips connected to its OVLO pin.
The OVLO pin has an internal switch to ground that will
pull it low, whenever the device is disabled due to any fault
other than an Overvoltage condition. An enable pin
shutdown is not considered a fault and will not cause a
common shutdown. This feature allows multiple units to
turn on and off simultaneously by tying the OVLO pins
together in parallel. This can be used for operating several
hot plug devices in parallel, or for use with separate loads,
when all devices need to startup and shutdown
simultaneously.
5.2) 3.46];forTJ
25
°
C
COVLO
[1
Temperature Limit
The temperature limit circuit senses the temperature of the
Power FET and removes the gate drive if the maximum level
is exceeded. For the autoretry device, there is a nominal
hysteresis of 40
°
C for this circuit. After a thermal shutdown,
the device will automatically restart when the temperature
drops to a safe level as determined by the hysteresis. The
latching thermal circuit can be reset either by recycling the
input power, or by toggling the enable signal.
Current Limit
An external resistor from the current limit pin to the source
pins set the level at which the device will limit the current.
The plot of resistance vs. current limit includes two curves,
one for short circuit and one for overload.
A short circuit condition is one in which the SENSEFET
is not fully enhanced, and is therefore in a high impedance
mode of operation. In this case there are many hundreds of
millivolts across the drain to source pins of the SENSEFET.
This occurs when the output sees a very low impedance short
as well as when the capacitor is charging at turn on. In both
cases there are several volts or more across the FET.
An overload condition is one in which the SENSEFET is
still fully enhanced and the drain to source voltage is the
product of the drain current and the on resistance of the FET.
The sense voltage out of the SENSEFET has a different
relation to the drain current in these two conditions. The
difference in current limit levels for these two cases is called
DI, where:
I
VrefRDSon
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| NIS5102QP2HT1 | 功能描述:熱插拔功率分布 MI HI SDE SMRT HOTPLUG RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| NIS5102QP2HT1G | 功能描述:熱插拔功率分布 MI HI SDE SMRT HOTPLUG RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| NIS510X | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Low cap. diode array for 2 Line High Speed USB protection devic |
| NIS5112 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Electronic Fuse |
| NIS5112_07 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Electronic Fuse |
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