參數(shù)資料
型號： MAX5938LEEE+
廠商： Maxim Integrated
文件頁數(shù)： 24/26頁
文件大?。?/td> 915K
描述： IC HOT-SWAP CTRLR -48V 16-QSOP
產品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 100
類型： 熱交換控制器
應用： 通用
內部開關： 無
電源電壓： -10 V ~ -80 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應商設備封裝： 16-QSOP
包裝： 管件
At any time (t) the V
OUT
fraction of V
OUT
(max) is:
V
OUT
(t) / [(dV/dt) x ?/DIV>
C
] = (1-e
(-t / 腖,eqv)
)
If V
OUT
(t) is measured at time t, then the equivalent
time constant of the load is found from:
?/DIV>
L,eqv
= -t / ln(1  V
OUT
/ [(dV/dt) x ?/DIV>
C
])
As mentioned earlier, several measurements of V
OUT
at times t1, t2, t3, and t4 should be made during the
ramp. Each of these may result in slightly different val-
ues of ?/DIV>
L,eqv
and all values should then be averaged.
In making the measurements, the V
IN
ramp duration
should be such that V
OUT
reaches 2 or 3 times the
selected V
SC
. The ramp tests should include three
ramp rates: V
SC
/ ?/DIV>
C
, 2 x V
SC
/ ?/DIV>
C
, and 4 x V
SC
/ ?/DIV>
C
.
The values of ?/DIV>
L,eqv
may vary over the range of slew
rates due to measurement error, nonlinear dynamics in
the load, and due to the fact that Equation 1 is a simpli-
fication from a higher order dynamic system. The
resulting range of ?/DIV>
L,eqv
values should be used to vali-
date the performance of the final design.
Having ?/DIV>
C
, ?/DIV>
L,eqv
, R
STEP
, and C
STEP
in a graphical
analysis using Equation 1 and Equation 2 can verify the
step monitor function by displaying the relative timing
of t
CB
, t
STEP
, and t
SC
, which are the times when V
CB
,
V
STEP_MON
, and V
SC
voltage thresholds are exceeded.
A simple Excel spreadsheet for this purpose can be
supplied by Maxim upon request. Figures 23, 24, and
25 graphically verify a particular solution over 3
decades of V
IN
ramp rates. In addition, Figure 25 veri-
fies that this solution will block all circuit-breaker and
short-circuit faults for even the lowest V
IN
ramp that will
cause V
OUT
to exceed V
CB
.
-48V Hot-Swap Controller with V
IN
Step Immunity,
No R
SENSE
, and Overvoltage Protection
24   ______________________________________________________________________________________
Figure 24. V
OUT
Response to V
IN
Ramp of 30V/ms
V
OUT
 RESPONSE TO V
IN
 RAMP OF 30V/ms
TIME (祍)
A
B
t
CB
E
F
C
D
A = V
IN
 (GND - V
EE
)
B = V
STEP_MON
C = V
OUT
D = V
STEP,TH
E = V
CB
F = V
SC
36
32
28
24
20
16
12
8
4
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
0
40
t
SC
t
STEP
Figure 25. V
OUT
Response to V
IN
Ramp of 3V/ms
V
OUT
 RESPONSE TO V
IN
 RAMP OF 3V/ms
TIME (祍)
A = V
IN
 (GND - V
EE
)
B = V
STEP_MON
C = V
OUT
D = V
STEP,TH
E = V
CB
F = V
SC
400
300
100
200
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
0
500
A
B
D
E
F
C
t
STEP
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MAX5938LEEE+ 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品: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
MAX5938LEEE+T 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品: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
MAX5938LEEE-T 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產品: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
MAX5939AESA 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產品: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
MAX5939AESA+ 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品: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
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