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参数资料
| 型号： | MAX5949AESA+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 12/18页 |
| 文件大小： | 186K |
| 描述： | IC CNTRLR HOT SWAP 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 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： | 带卷 (TR) |
The UV pin is also used to reset the circuit breaker after
a fault condition has occurred. The UV pin can be pulled
below V
UVL
to reset the circuit breaker.
Figure 12 shows how to program the undervoltage and
overvoltage trip thresholds using three resistors. With R4
= 549k&, R5 = 6.49k&, and R6 = 10k&, the undervoltage
threshold is set to 38.5V (with a 43V release from under-
voltage), and the overvoltage is set to 71V. The resistor-
divider also increases the hysteresis of the overvoltage
and overvoltage lockout, to 4.5V and 1.1V at the input
supply, respectively.
PWRGD/PWRGD Output
The PWRGD (PWRGD) output can be used directly to
enable a power module after hot insertion. The
MAX5949A (PWRGD) can be used to enable modules
with an active-low enable input (Figure 14), while the
MAX5949B (PWRGD) is used to enable modules with
an active-high enable input (Figure 13).
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
.
-48V Hot-Swap Controllers
with External R
SENSE
12 ______________________________________________________________________________________
GATE
2V/div
NODE2
50V/div
1s/div
V
EE
SENSE
GATE
DRAIN
V
DD
OV
UV
PWRGD
MAX5949A
-48V RTN
-48V RTN
(SHORT PIN)
*
-48V
*DIODES INC. SMAT70A.
R4
549k&
1%
R8
510k&
5%
R5
10k&
1%
R6
549k&
1%
R7
1M&
5%
R9
6.49k&
1%
R1
0.02&
5%
R3
1k&
5%
R2
10&
5%
C1
470nF
25V
C4
1礔
100V
N
Q1
IRF530
D1
1N4148
Q2
2N2222
Q3
ZVN3310
C2
15nF
100V
C3
100礔
100V
NODE2
Figure 11. Automatic Restart After Current Fault
V
EE
V
DD
OV
UV
MAX5949A
MAX5949B
-48V RTN
-48V
V
UV
= 1.255
R4 + R5 + R6
R5 + R6
R4
R5
R6
-48V RTN
(SHORT PIN)
3
2
4
8
V
OV
= 1.255
R4 + R5 + R6
R6
Figure 12. Undervoltage and Overvoltage Sensing
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5949BESA | 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 |
| MAX5949BESA+ | 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 |
| MAX5949BESA+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 |
| MAX5949BESA-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 |
| MAX5950ETJ | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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