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参数资料
| 型号： | MAX5922BEUI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/21页 |
| 文件大小： | 437K |
| 描述： | IC NETWORK PWR SW +48V 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 以太网供电开关（PoE） |
| 应用： | 远程外设（工业控制，相机，数据访问） |
| 内部开关： | 是 |
| 电源电压： | 32 V ~ 60 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 管件 |
+48V, Single-Port Network Power Switch
For Power-Over-LAN
______________________________________________________________________________________ 15
PD Classification Mode
(PD Classification)
Following a valid PD detection, and if the CLASS pin is
high, the MAX5922 enters the PD classification mode. If
the CLASS pin is low, the PD classification mode is
skipped and the MAX5922 goes directly from PD
detection to the power mode. During the PD classifica-
tion mode, the MAX5922 forces a probe voltage (17.5V)
at the OUT pin and measures the current out of this pin.
The measured current determines the class of the PD.
The classification results are reported at the classifica-
tion logic outputs CL0, CL1, CL2. Table 2 shows the
classification threshold limits and the corresponding
logic outputs CL0, CL1, and CL2.
Connect an external 150& ?% resistor (R
RCL
) from
RCL to IN to set the classification current reference. If
the PD classification function is not used, RCL can be
left floating. For the MAX5922B/MAX5922C, the
DET_DIS pin must be connected low to enable the
classification phase. If DET_DIS is connected high, the
classification phase is disabled regardless of the state
of the CLASS pin. After the classification phase, the
MAX5922 enters power-up.
Power-Up Mode
After the PD is successfully detected and classified, the
MAX5922 enters power-up mode. During this mode,
the MAX5922 gradually turns on the integrated N-chan-
nel MOSFET. To minimize EMI, the MAX5922 limits the
Table 2. PD Classification Threshold Limits
SENSED CURRENT (mA)
CL2
CL1
CL0
CLASS TYPES
0.5 to 4 or above 43
0
0
0
Class 0
9 to 12
0
0
1
Class 1
17 to 20
0
1
0
Class 2
26 to 30
0
1
1
Class 3
36 to 42
1
0
0
Class 4
N/A
1
0
1
Not used
N/A
1
1
0
Successful detection (classification disabled or DET_DIS = low)
Power device not detected yet
or CLASS pin connected low.
1
1
1
Detection ongoing
t
0V
t
DET1
=
88ms
t
DET2
=
88ms
UVLO
8V
4V
V
IN
V
OUT
Figure 5. PD Detection with an Invalid PD Signature
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5922BEUI+ | 功能描述:热插拔功率分布 48V Single-Port Network Power Switch 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 |
| MAX5922BEUI+T | 功能描述:热插拔功率分布 48V Single-Port Network Power Switch 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 |
| MAX5922BEUI-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 |
| MAX5922CEUI | 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 |
| MAX5922CEUI+ | 功能描述:热插拔功率分布 48V Single-Port Network Power Switch 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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