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參數(shù)資料
| 型號(hào)： | HV301LG |
| 廠商： | SUPERTEX INC |
| 元件分類： | 電源管理 |
| 英文描述： | Hotswap, Controllers with Circuit Breaker |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 9/21頁 |
| 文件大?。?/td> | 664K |
| 代理商： | HV301LG |
9
HV301/HV311
Application Information
Supported External Pass Devices
The HV301 and HV311 are designed to support N-Channel
MOSFETs and IGBTs.
Selection of External Pass Devices
Since the current limit is likely to be set just slightly higher than
maximum continuous load current in a typical system, the
continuous current rating of the device will have to be at least
equal to the current limit value.
The
R
of the device is likely to be selected based on
allowable voltage drop after the hot swap action has been
completed. Thus the continuous power dissipation rating of the
device can be determined from the following equation:
P
R
I
CONT
DS ON
(
LIMIT
=
×
)
2
The peak power rating may be calculated from the following
equation:
P
V
I
PEAK
IN
LIMIT
=
×
Given these values an external pass transistor may be selected
from the manufacturers data sheet.
Selection of Current Sense Resistor
The power rating of the sense resistor must be greater than
I
R
load
×
, where I
load
is the normal maximum operating load.
2
Kelvin Connection to Sense Resistor
Physical layout of the printed circuit board is critical for correct
current sensing. Ideally trace routing between the current sense
resistor and the V
and SENSE pins should be direct and as
short as possible with zero current in the sense traces. The use
of Kelvin connection from SENSE pin and V
pin to the respec-
tive ends of the current sense resistor is recommended.
Paralleling External Pass Transistors
Due to variations in threshold voltages and gain characteristics
between samples of transistors reliable 50% current sharing is
not achievable. Some measure of paralleling may be accom-
plished by adding resistors in series with the source of each
device; however, it will cause increased voltage drop and power
dissipation.
Paralleling of external Pass devices is not recommended!
If a sufficiently high current rated external pass transistor cannot
be found then increased current capability may be achieved by
connecting independent hotswap circuits in parallel, since they
act as current sources during the load capacitor charging time
when the circuits are in current limit. For this application the
HV301 with active high PWRGD is recommended where the
PWRGD pins of multiple hot swap circuits can be connected in
a wired OR configuration.
To Negative
Terminal of
Power Source
To Source
of MOSFET
To
V
EE
Pin
Sense Resistor
To
SENSE
Pin
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HV311 | Hotswap, Controllers with Circuit Breaker |
| HV311LG | Hotswap, Controllers with Circuit Breaker |
| HV302 | Sequencing Hotswap Controllers |
| HV302DB1 | Hotswap Controller |
| HV302NG | Sequencing Hotswap Controllers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HV301LG-G | 功能描述:熱插拔功率分布 Active High 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 |
| HV301LG-M908 | 功能描述:熱插拔功率分布 -10 to -90V Activ Hi 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 |
| HV301LG-M908-G | 功能描述:熱插拔功率分布 -10 to -90V Activ Hi 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 |
| HV301LG-P031 | 功能描述:熱插拔功率分布 -10 to -90V Activ Hi 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 |
| HV301LG-P031-G | 功能描述:熱插拔功率分布 -10 to -90V Activ Hi 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 |
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