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參數(shù)資料
| 型號： | MAX5949BESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Dual D-type Positive-Edge-Triggered Flip-Flops With Preset And C 14-CDIP -55 to 125 |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 0.150 INCH, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 16/18頁 |
| 文件大?。?/td> | 269K |
| 代理商： | MAX5949BESA |
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, and 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.
t
V
ms
1
.
=
=
4000
1 25
μ
-48V Hot-Swap Controllers
with External R
SENSE
16
______________________________________________________________________________________
SENSE RESISTOR
HIGH-CURRENT PATH
MAX5949A
MAX5949B
SENSE V
EE
Figure 16. Recommended Layout for Kelvin-Sensing Current
Through Sense Resistor
Selector Guide
PART
PWRGD POLARITY
Active low (
PWRGD
)
Active high (PWRGD)
FAULT MANAGEMENT
Latched
Latched
MAX5949AESA
MAX5949BESA
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5949BESA+ | 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5949BESA+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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5949BESA-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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5950ETJ | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX5950ETJ+ | 功能描述:電壓模式 PWM 控制器 12V PWM Controller w/Hot-Swap RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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