參數(shù)資料
型號(hào)： MAX5948BESA+T
廠商： Maxim Integrated
文件頁數(shù)： 17/18頁
文件大?。?/td> 182K
描述： IC CNTRLR HOT SWAP 8-SOIC
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
類型： 熱交換控制器
應(yīng)用： 通用
內(nèi)部開關(guān)： 無
電源電壓： -20 V ~ -80 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 8-SOIC
包裝： 帶卷 (TR)
Using the IRL520NS, V
DS
d 0.625V even at +80癈 so
efficiency e 98.6% at 80癈. P
D
d 1.56W and junction
temperature rise above case temperature would be 5癈
due to the package ?/DIV>
JC
= 3.1癈/W thermal resistance.
Of course, using the SUD40N10-25 would yield an effi-
ciency greater than 99.8% to compensate for the
increased cost.
If I
CB
is set to twice I
LOAD
, or 5A, V
DS
momentarily dou-
bles to d 1.25V. If C
OUT
= 4000礔, transient-line input
voltage is 36V, the 5A charging-current pulse is:
Entering the data sheet transient-thermal-resistance
curves at 1ms provides a 窲C = 0.9癈/W. P
D
= 6.25W,
so t
JC
= 5.6癈. Clearly, this is not a problem.
Example 2:
I
LOAD
= 10A, efficiency = 98%, allowing V
DS
= 0.96V
but R
DS(ON)
d 96m&. An IRF530 in a D
2
PAK exhibits
R
DS(ON)
d 90m& at +25癈 and d 135m& at +80癈.
Power dissipation is 9.6W at +25癈 or 14.4W at +80癈.
Junction-to-case thermal resistance is 1.9W/癈, so the
junction temperature rise would be approximately 5癈
above the +25癈 case temperature. For higher efficien-
cy, consider IRL540NS with R
DS(ON)
d 44m&. This
allows ?= 99%, P
D
d 4.4W, and T
JC
= +4癈 (?/DIV>
JC
=
1.1癈/W) at +25癈.
Thermal calculations for the transient condition yield
I
CB
= 20A, V
DS
= 1.8V, t = 0.5ms, transient ?/DIV>
JC
=
0.12癈/W, P
D
= 36W and t
JC
= 4.3癈.
t
F x
V
A
ms
=
=
4000
1 25
5
1
?/DIV>
.
-48V Hot-Swap Controllers
with External R
SENSE
______________________________________________________________________________________   17
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages
. Note that a
+, #, or - in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE NO.
LAND
PATTERN NO.
8 SO
S8+5
21-0041
90-0096
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