参数资料
型号: MAX5941BCSE+
厂商: Maxim Integrated Products
文件页数: 8/24页
文件大小: 0K
描述: IC IEEE 802.3AF-COMP POE 16-SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 50
控制器类型: 以太网供电控制器(POE)
接口: IEEE 802.3af
电源电压: 48V
电流 - 电源: 1mA
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC
包装: 管件
MAX5941A/MAX5941B
IEEE 802.3af-Compliant Power-Over-Ethernet
Interface/PWM Controller for Power Devices
16
______________________________________________________________________________________
to 2.4V, the internal voltage reference. Pull VSS_SHDN
below 0.25V to disable the controller.
Undervoltage lockout shuts down the controller when
VCC is less than 6.6V. The regulators for V+ and the ref-
erence remain on during shutdown.
Current-Sense Comparator
The current-sense (CS) comparator and its associated
logic limit the peak current through the MOSFET.
Current is sensed at CS as a voltage across a sense
resistor between the source of the MOSFET and GND.
To reduce switching noise, connect CS to the external
MOSFET source through a 100
resistor or an RC low-
pass filter (Figures 5, 6). Select the current-sense resis-
tor, RSENSE, according to the following equation:
where ILimPrimary is the maximum peak primary-side
current.
When VCS > 465mV, the power MOSFET switches off.
The propagation delay from the time the switch current
reaches the trip level to the driver turn-off time is 170ns.
RI
SENSE
LimPrimary
= 0 465
./
V
MAX5941B
VDD
UVLO
RCL
V+
GND
SS_SHDN
PGOOD
GATE
VEE
NDRV
CS
V-
VCC
OPTO
VIN
(30V TO 72V)
VOUT
OPTOCOUPLER
CDD
47
F
CSS
0.1
F
RDISC
25.5k
3k
4.75k
CCC
10
F
100
RSENSE
100m
20
R1
25.5k
R2
8.25k
COUT
3
× 560F
0.1
F
CIN
3
× 0.47F
L1
4.7
H
0.1
F
240k
NT
NR
NP
NS
M1
IRF640N
4.7nF
250VAC
TLV431
1N4148
6
CMHD2003
14
5
1nF
SBL204OCT
5V/10A
220
14
RCL
OUT
Figure 5. Forward Converter
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MAX5941BCSE+ 功能描述:输入/输出控制器接口集成电路 IEEE 802.3af POE Int/PWM Controller RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray
MAX5941BCSE+T 功能描述:输入/输出控制器接口集成电路 IEEE 802.3af POE Int/PWM Controller RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray
MAX5941BCSE-T 功能描述:电源开关 IC - POE / LAN RoHS:否 制造商:Fairchild Semiconductor 开关数量:Single 开关配置:SPST 开启电阻(最大值):7.3 Ohms 串话: 带宽: 开启时间(最大值):13 ns 关闭时间(最大值):20 ns 切换电压(最大): 工作电源电压:8 V to 26 V 最大工作温度:+ 125 C 安装风格:Through Hole 封装 / 箱体:TO-220F-6
MAX5941BESE 功能描述:电源开关 IC - POE / LAN RoHS:否 制造商:Fairchild Semiconductor 开关数量:Single 开关配置:SPST 开启电阻(最大值):7.3 Ohms 串话: 带宽: 开启时间(最大值):13 ns 关闭时间(最大值):20 ns 切换电压(最大): 工作电源电压:8 V to 26 V 最大工作温度:+ 125 C 安装风格:Through Hole 封装 / 箱体:TO-220F-6
MAX5941BESE+ 功能描述:输入/输出控制器接口集成电路 IEEE 802.3af POE Int/PWM Controller RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray