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参数资料
| 型号： | MAX5938LEEE+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/26页 |
| 文件大小： | 915K |
| 描述： | IC HOT-SWAP CTRLR -48V 16-QSOP |
| 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： | -10 V ~ -80 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
Applications Information
Setting ON, OFF, and OV Voltage Levels
The trip levels for ON, OFF, and OV can readily be set
with a 4-element resistor-divider. Total resistance is a
trade off of quiescent current, threshold tolerance due
to pin input bias current (25nA), and the ability to follow
very fast supply transients. Both ON and OV have hys-
teresis on the reference threshold voltage: the rising
reference threshold is 1.25V and the falling threshold is
1.125V. The reference threshold voltage for OFF is
1.25V. In determining a set of resistors, use V
REF
=
1.25V for ON, OFF, and OV and an R
TOT
= 100k& in
this example. See Figure 12 for nomenclature. For this
example, use V
OV
= 80V, V
ON
= 42V, and V
OFF
= 38V
as the desired voltage trip levels.
1) R
4
= R
TOT
x V
REF
/ V
OV
2) R
3
= R
TOT
x V
REF
/ V
ON
- R
4
3) R
2
= R
TOT
x V
REF
/ V
OFF
- R
3
- R
4
4) R
1
= R
TOT
- R
2
- R
3
- R
4
The exact result to three decimal places is R1 =
96.711k&, R2 = 313&, R3 = 1.414k&, and R4 =
1.563k&. When converted to the nearest 1% standard
resistor, the values become R1 = 97.6k&, R2 = 316&,
R3 = 1.40k&, and R4 = 1.58k&.
-48V Hot-Swap Controller with V
IN
Step Immunity,
No R
SENSE
, and Overvoltage Protection
14 ______________________________________________________________________________________
Figure 12. Programming the MAX5938s ON, OFF, and OV
Thresholds
MAX5938
GND
OFF
ON
V
IN
= (GND - V
EE
)
R4
R3
R2
R1
OV
V
EE
Figure 13. MAX5938 Circuit-Breaker Threshold Adjustment
MAX5938
C
LOAD
LOAD
SC TRIP
R
ON
V
OUT
I
LOAD
CB TRIP
t
CB_DLY
R
INT
2k&
?.5%
R
CB_ADJ
R
R
V
SC
V
EE
GND
50礎
CB_ADJ
I
CB_ADJ
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5938LEEE+ | 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 |
| MAX5938LEEE+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 |
| MAX5938LEEE-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 |
| MAX5939AESA | 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 |
| MAX5939AESA+ | 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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