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| 型号： | MAX5914AEMH+D |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/20页 |
| 文件大小： | 614K |
| 描述： | IC HOT-SWAP CNTRLR 48V 44-MQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 96 |
| 类型： | 热交换控制器 |
| 应用： | IP 电话，LAN 网络供电，网络路由器和交换机 |
| 内部开关： | 无 |
| 电源电压： | 35 V ~ 72 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-QFP |
| 供应商设备封装： | 44-MQFP（10x10） |
| 包装： | 托盘 |
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
______________________________________________________________________________________ 13
A second comparator with a detection threshold of
3V
SC
activates a fast 15mA pulldown of the gate. The
purpose of this comparator is to rapidly discharge the
gate when a momentary current peak overstresses the
external FET, helping the regulation to act more rapidly.
The sense resistor is also used to detect an open-circuit
or low-current condition with a typical threshold of 3mV.
Open-Circuit Detection
The MAX5913A/MAX5914A detect when a port has low
current or is open circuit, and turn off the switch to that
port. After the switch is turned on and the POK condi-
tions are met, the open-circuit detector is enabled after
a 900ms delay. The open-circuit voltage threshold is set
at 3mV across the current-sense resistor. Drive OCEN
high to enable open-circuit detectors for all four ports.
Drive OCEN low to disable the detectors. Each port has
an open-circuit flag that can be read from STAT_ out-
puts when the STATOUT is low. STAT_ output high indi-
cates that the switch is latched off due to an
open-circuit condition on that port. To reset the latch
pull ON_ low and then high to restart (Table 1).
Output Voltage Sense and Power-OK
The MAX5913A/MAX5914A sense the output voltage of
the port at the source of the external MOSFET switch.
N
V
RLY
V
CC
V
RLY
V
DD
RTIM
+12V
+3.3V
DIGITAL
INTERFACE
OUTPUTS
DIGITAL
INTERFACE
INPUTS
DGND AGND RLYD1
RLYD4
CSP1
DRAIN1
OUT1
CSP4
DRAIN4
GATE4
OUT4
GATE1
FAULT
STAT1
STAT2
STAT3
STAT4
V
CC
PORT 1
ON1
ON2
ON3
ON4
RLYON1
RLYON2
RLYON3
RLYON4
OCEN
RTRYEN
STATOUT
DC
V
CC
= +35V TO +72V
MAX5913A
N
V
RLY
PORT 4
Figure 5. Typical Application Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5914AEMH-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 |
| MAX5914EMH | 制造商:Maxim Integrated Products 功能描述:+48V QUAD HOT-SWAP CONTROLLERS FOR POWER-OVER - Rail/Tube |
| MAX5914EMH+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5914EMH+D | 制造商:Maxim Integrated Products 功能描述:HOT SWAP CNTRLR 44MQFP - Rail/Tube |
| MAX5914EMH+T | 制造商:Maxim Integrated Products 功能描述:HOT SWAP CNTRLR 44MQFP - Tape and Reel |
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