參數(shù)資料
型號： MAX5948A
廠商： Maxim Integrated Products, Inc.
元件分類： 基準電壓源/電流源
英文描述： -48V Hot-Swap Controllers with External RSENSE
中文描述： -48V熱插拔控制器，外置RSENSE
文件頁數(shù)： 16/18頁
文件大小： 685K
代理商： MAX5948A
M
-48V Hot-Swap Controllers
with External R
SENSE
16
______________________________________________________________________________________
V
EE
SENSE
GATE
DRAIN
V
DD
OV
5V
UV
PWRGD
MAX5948A
GND
(SHORT PIN)
-48V
R4
562k
1%
R5
9.09k
1%
R6
10k
1%
R1
0.02
5%
R3
18k
5%
R2
10
5%
C1
150nF
25V
Q1
IRF530
C2
3.3nF
100V
SENSE-
V
OUT-
SENSE+
TRIM
ON/OFF
LUCENT
JW050A1-E
V
IN+
V
IN-
V
OUT+
C4
100
μ
F
100V
C5
100
μ
F
16V
C3
0.1
μ
F
100V
*
GND
*DIODES INC. SMAT70A.
Typical Operating Circuit
Determine value of R3:
If an optocoupler is utilized as in Figure 14, deter-
mine the LED series resistor:
V
mA
3
≤
Set R2 = 10
.
Although the suggested optocoupler is not specified for
operation below 5mA, its performance is adequate for
36V temporary low-line voltage where LED current
would then be
≈
2.2mA to 3.7mA. If R7 is set as high as
51k
, optocoupler operation should be verified over
the expected temperature and input voltage range to
ensure suitable operation when LED current
≈
0.9mA for
48V input and
≈
0.7mA for 36V input.
If input transients are expected to momentarily raise the
input voltage to >100V, select an input transient-volt-
age-suppression diode (TVS) to limit maximum voltage
on the MAX5948 to less than 100V. A suitable device is
the Diodes Inc. SMAT70A telecom-specific TVS.
Select Q1 to meet supply voltage, load current, efficien-
cy, and Q1 package power-dissipation requirements:
BV
DSS
≥
100V
I
D(ON)
≥
3 x I
LOAD
DPAK, D
2
PAK, or TO-220AB
Choose the lowest practical R
DS(ON)
within budget
constraints. MOSFETs with values from 14m
to
540m
are available at 100V breakdown.
Ensure that the temperature rise of Q1 junction is not
excessive at normal load current for the package select-
ed. Ensure that I
CB
current during voltage transients
does not exceed allowable transient-safe operating-area
limitations. This is determined from the SOA and tran-
sient-thermal-resistance curves in the Q1 manufacturer’s
data sheet.
Example 1:
I
LOAD
= 2.5A, efficiency = 98%, then V
DS
= 0.96V is
acceptable, or R
DS(ON)
≤
384m
at operating temper-
ature is acceptable. An IRL520NS 100V nMOS with
R
DS(ON)
≤
180m
and I
D(ON)
= 10A is available in
D
2
PAK. (A Vishay Siliconix SUD40N10-25 100V nMOS
with R
DS(ON)
≤
25m
and I
D(ON)
= 40A is available in
DPAK, but may be more costly because of a larger
die size).
R
V
I
mA
5
IN NOMINAL
(
LED
7
2
)
≤
=
R
s
C
3
2
150
≤
μ
相關(guān)PDF資料
PDF描述
MAX5948AESA -48V Hot-Swap Controllers with External RSENSE
MAX5948B 4-2-3-2 Input AND-OR-invert Gates 14-CDIP -55 to 125
MAX5948BESA -48V Hot-Swap Controllers with External RSENSE
MAX5949 -48V Hot-Swap Controllers with External RSENSE
MAX5949AESA -48V Hot-Swap Controllers with External RSENSE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX5948AESA 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
MAX5948AESA+ 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
MAX5948AESA+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
MAX5948AESA-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
MAX5948BESA 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
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