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参数资料
| 型号： | MAX5948AESA+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/18页 |
| 文件大小： | 182K |
| 描述： | IC HOT SWAP CONTROL 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | -20 V ~ -80 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1423 (CN2011-ZH PDF) |
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>
?/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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5948AESA+ | 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5948AESA+T | 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5948AESA-T | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5948BESA | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5948BESA+ | 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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