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參數(shù)資料
| 型號(hào)： | HV312NG |
| 廠商： | SUPERTEX INC |
| 元件分類： | 電源管理 |
| 英文描述： | Sequencing Hotswap Controllers |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14 |
| 封裝： | SOIC-14 |
| 文件頁數(shù)： | 10/10頁 |
| 文件大?。?/td> | 618K |
| 代理商： | HV312NG |
10 Rev. D 04/17/02
HV302 / HV312
Design Information
-
continued
Supported External Pass Devices
The HV302 and HV312 are designed to support N-Channel
MOSFETs and IGBTs.
Selection of External Pass Devices
The R
DS(ON)
of the device is likely to be selected based on
allowable voltage drop at maximum load (I
) after the
Hotswap action has been completed. Thus the required
continuous power dissipation rating (P
CONT
) of the device can be
determined from the following equation:
MAX
(
LOAD
)
ON
(
DS
CONT
I
R
P
×
=
The peak power rating (P
) should be based on the highest
current level, which is always the circuit breaker trip set point (I
CB
),
and on the assumption that a output is shorted. The peak power
rating may be calculated from the following equation:
CB
IN
PEAK
I
V
P
×
=
Given these values an external pass transistor may be selected
from the manufacturers data sheet.
Paralleling External Pass Transistors
Due to variations in threshold voltages and transconductance
characteristics between samples of MOSFETs, reliable 50%
current sharing is not achievable. Some measure of paralleling
may be accomplished 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 HV302 with
active high PWRGD is recommended where the PWRGD pins of
multiple Hotswap circuits can be connected in a wired OR
configuration.
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
EE
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
EE
pin to the respective
ends of the current sense resistor is recommended.
To
VEE
Pin
)
2
To Negative
Terminal of
Power Source
To Source
of MOSFET
To
SENSE
Pin
Sense Resistor
Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 Fax: (408) 222-4895 www.supertex.com
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|---|---|
| HV312NG-G | 功能描述:熱插拔功率分布 Cntl (Act Low) 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 |
| HV312NG-M905 | 功能描述:熱插拔功率分布 -10 to -90V Activ Lw 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 |
| HV312NG-M905-G | 功能描述:熱插拔功率分布 -10 to -90V Activ Lw 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 |
| HV3137 | 制造商:SUPERTEX 制造商全稱:SUPERTEX 功能描述:64-Channel Serial To Parallel Converter With Open Drain Outputs |
| HV3137PG | 功能描述:計(jì)數(shù)器移位寄存器 64-Ch Converter RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時(shí)間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
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