參數(shù)資料
型號(hào)： MAX5941BCSE
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： Octal D-Type Positive Edge Triggered Flip-Flops with 3-State Outputs 20-CDIP -55 to 125
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
封裝： 0.150 INCH, MS-012AC, SOP-16
文件頁(yè)數(shù)： 16/24頁(yè)
文件大?。?/td> 453K
代理商： MAX5941BCSE
M
IEEE 802.3af-Compliant Power-Over-Ethernet
Interface/PWM Controller for Power Devices
16
______________________________________________________________________________________
to 2.4V, the internal voltage reference. Pull V
SS_
SHDN
below 0.25V to disable the controller.
Undervoltage lockout shuts down the controller when
V
CC
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, R
SENSE
, according to the following equation:
where I
LimPrimary
is the maximum peak primary-side
current.
When V
CS
> 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.
R
I
SENSE
LimPrimary
=
0 465
.
/
V
MAX5941B
V
DD
UVLO
RCL
V+
GND
SS_SHDN
PGOOD
PGOOD
GATE
V
EE
NDRV
CS
V-
V
CC
OPTO
V
IN
(30V TO 72V)
V
OUT
OPTOCOUPLER
C
DD
47
μ
F
C
SS
0.1
μ
F
R
DISC
25.5k
3k
4.75k
C
CC
10
μ
F
100
R
SENSE
100m
20
R
1
25.5k
R
8.25k
C
OUT
3
×
560
F
0.1
μ
F
C
IN
3
×
0.47
μ
F
L1
4.7
μ
H
0.1
μ
F
240k
N
T
N
R
N
P
14
N
S
5
M1
IRF640N
4.7nF
250VAC
TLV431
1N4148
6
CMHD2003
1nF
SBL204OCT
5V/10A
220
14
R
CL
OUT
Figure 5. Forward Converter
相關(guān)PDF資料
PDF描述
MAX5941BESE Octal D-Type Positive Edge Triggered Flip-Flops with 3-State Outputs 20-LCCC -55 to 125
MAX5942A IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller for Power Devices
MAX5942B IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller for Power Devices
MAX5942ACSE IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller for Power Devices
MAX5942A-MAX5942B Octal D-Type Positive Edge Triggered Flip-Flops with 3-State Outputs 20-CFP -55 to 125
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX5941BCSE+ 功能描述:輸入/輸出控制器接口集成電路 IEEE 802.3af POE Int/PWM Controller RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
MAX5941BCSE+T 功能描述:輸入/輸出控制器接口集成電路 IEEE 802.3af POE Int/PWM Controller RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
MAX5941BCSE-T 功能描述:電源開(kāi)關(guān) IC - POE / LAN RoHS:否 制造商:Fairchild Semiconductor 開(kāi)關(guān)數(shù)量:Single 開(kāi)關(guān)配置:SPST 開(kāi)啟電阻（最大值）:7.3 Ohms 串話: 帶寬: 開(kāi)啟時(shí)間（最大值）:13 ns 關(guān)閉時(shí)間（最大值）:20 ns 切換電壓（最大）: 工作電源電壓:8 V to 26 V 最大工作溫度:+ 125 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:TO-220F-6
MAX5941BESE 功能描述:電源開(kāi)關(guān) IC - POE / LAN RoHS:否 制造商:Fairchild Semiconductor 開(kāi)關(guān)數(shù)量:Single 開(kāi)關(guān)配置:SPST 開(kāi)啟電阻（最大值）:7.3 Ohms 串話: 帶寬: 開(kāi)啟時(shí)間（最大值）:13 ns 關(guān)閉時(shí)間（最大值）:20 ns 切換電壓（最大）: 工作電源電壓:8 V to 26 V 最大工作溫度:+ 125 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:TO-220F-6
MAX5941BESE+ 功能描述:輸入/輸出控制器接口集成電路 IEEE 802.3af POE Int/PWM Controller RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
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