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參數(shù)資料
| 型號(hào)： | MAX5920AESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CDIP -55 to 125 |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 0.150 INCH, MS-012AA, SO-8 |
| 文件頁數(shù)： | 16/18頁 |
| 文件大?。?/td> | 310K |
| 代理商： | MAX5920AESA |
M
If I
CB
is set to twice I
LOAD
, or 5A, V
DS
momentarily dou-
bles to
≤
1.25V. If C
OUT
= 4000μF, transient-line input
voltage is
36V, the 5A charging-current pulse is:
F x
A
5
Entering the data sheet transient-thermal-resistance
curves at 1ms provides a
θ
JC = 0.9
°
C/W. P
D
= 6.25W,
so
t
JC
= 5.6
°
C. Clearly, this is not a problem.
Example 2:
I
LOAD
= 10A, efficiency = 98%, allowing V
DS
= 0.96V
but R
DS(ON)
≤
96m
. An IRF530 in a D
2
PAK exhibits
R
DS(ON)
≤
90m
at +25
°
C and
≤
135m
at +80
°
C.
Power dissipation is 9.6W at +25
°
C or 14.4W at +80
°
C.
Junction-to-case thermal resistance is 1.9W/
°
C, so the
junction temperature rise would be approximately 5
°
C
above the +25
°
C case temperature. For higher efficien-
cy, consider IRL540NS with R
DS(ON)
≤
44m
. This
allows
η
= 99%, P
D
≤
4.4W, and T
JC
= +4
°
C (
θ
JC
=
1.1
°
C/W) at +25
°
C.
Thermal calculations for the transient condition yield
I
CB
= 20A, V
DS
= 1.8V, t = 0.5ms, transient
θ
JC
=
0.12
°
C/W, P
D
= 36W and
t
JC
= 4.3
°
C.
Layout Guidelines
Good thermal contact between the MAX5920A/
MAX5920B and the external MOSFET is essential for the
thermal-shutdown feature to operate effectively. Place
the MAX5920A/MAX5920B as close as possible to the
drain of the external MOSFET and use wide circuit-board
traces for good heat transfer (see Figure 15).
t
V
ms
1
=
=
4000
1 25
.
μ
-48V Hot-Swap Controller
with External R
SENSE
16
______________________________________________________________________________________
SENSE RESISTOR
HIGH-CURRENT PATH
MAX5920A
MAX5920B
SENSE V
EE
Figure 15. Recommended Layout for Kelvin-Sensing Current
Through Sense Resistor
Selector Guide
PART
PWRGD POLARITY
Active low (
PWRGD
)
Active high (PWRGD)
FAULT MANAGEMENT
Latched
Latched
MAX5920AESA
MAX5920BESA
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5920AESA+ | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller 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 |
| MAX5920AESA+T | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller 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 |
| MAX5920AESA-T | 功能描述:熱插拔功率分布 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 |
| MAX5920BESA | 功能描述:熱插拔功率分布 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 |
| MAX5920BESA+ | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller 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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