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參數資料
| 型號： | MAX5948BESA+T |
| 廠商： | Maxim Integrated |
| 文件頁數： | 13/18頁 |
| 文件大?。?/td> | 182K |
| 描述： | IC CNTRLR HOT SWAP 8-SOIC |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | 熱交換控制器 |
| 應用： | 通用 |
| 內部開關： | 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） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
A separate resistor-divider must be used for the over-
voltage lockout setting. The supply overvoltage lockout
threshold is:
where V
OVH
is typically 1.223V.
Using R1 = 562k&, R2 = 16.9k&, R3 = 1.62M&, R4 =
506k&, R5 = 8.87k&, and the typical value of V
GATE
=
13.5V results in the following thresholds:
V
UV,HL
= 37.6V
V
UV,LH
= 43V
(with hysteresis now increased to 5.4V), and V
OV
= 71V
(with 1.2V hysteresis).
PWRGD/PWRGD Output
The PWRGD (PWRGD) output can be used directly to
enable a power module after hot insertion. The
MAX5948A (PWRGD) can be used to enable modules
with an active-low enable input (Figure 13), while the
MAX5948B (PWRGD) is used to enable modules with
an active-high enable input (Figure 12).
The PWRGD signal is referenced to the DRAIN termi-
nal, which is the negative supply of the power module.
The PWRGD signal is referenced to V
EE
.
When the DRAIN voltage of the MAX5948A is high with
respect to V
EE
, the internal pulldown MOSFET Q2 is off
and the PWRGD pin is in a high-impedance state
(Figure 13). PWRGD is pulled high by the modules
internal pullup current source, turning the module off.
When the DRAIN voltage drops below V
PG
, Q2 turns on
and PWRGD pulls low, enabling the module.
The PWRGD signal can also be used to turn on an LED
or optoisolator to indicate that the power is good
(Figure 13) (see the Component Selection Procedure
section).
V V
R R
R
OV
OVH
=
+
?/DIV>
?/DIV>
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?/DIV>
?/DIV>
?/DIV>
?/DIV>
4 5
5
-48V Hot-Swap Controllers
with External R
SENSE
______________________________________________________________________________________ 13
PWRGD
I1
V
EE
V
PG
-48V
R1
R2
C1
Q1
R3
C2
MAX5948B
V
IN+
V
IN-
C4
Q2
Q3
V
OUT+
V
OUT-
ON/OFF
VICOR
VI-J3D-CY
DRAIN
GATE
SENSE
V
EE
V
DD
R4
R5
R6
*
*DIODES INC. SMAT70A.
-48V RTN
-48V RTN
(SHORT PIN)
UV
OV
Figure 12. Active-High Enable Module
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5949AESA | 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 |
| MAX5949AESA+ | 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 |
| MAX5949AESA+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 |
| MAX5949AESA+TG126 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX5949AESA-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 |
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