參數(shù)資料
型號(hào)： EKK8011
英文描述： Low-Voltage, Single Supply, SPST, High Performance Analog Switches; Temperature Range: -40°C to 85°C; Package: 8-SOIC T&R
中文描述： 的USB PS / 2鍵盤控制器
文件頁(yè)數(shù)： 8/24頁(yè)
文件大小： 465K
代理商： EKK8011
MAX5942A/MAX5942B
IEEE 802.3af Power-Over-Ethernet
Interface/PWM Controller for Power Devices
16
______________________________________________________________________________________
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 180ns.
Internal Error Amplifier
The MAX5942A/MAX5942B include an internal error
amplifier that can be used to regulate the output volt-
age in the case of a nonisolated power supply (see
Figure 5). Calculate the output voltage using the follow-
ing equation:
where VREF = 2.4V.
Choose R1//R2 << RIN, where RIN
50k is the input
resistance of FB. The gain of the error amplifier is inter-
nally configured for -20 (see Figure 4).
The error amplifier may also be used to regulate the out-
put of the tertiary winding for implementing a primary-
side regulated isolated power supply (see Figure 7).
Calculate the output voltage using the following equation:
where NS is the number of secondary turns and NT is
the number of tertiary winding turns.
V
N
R
V
OUT
S
T
1
2
REF
=+
×
1
V
R
V
OUT
1
2
REF
=+
×
1
RI
SENSE
LIMPrimary
= 0 465
./
V
NDRV
VOUT
5V/10A
COUT
3
560
F
CDD
4.7
F
CCC
10
F
CSS
0.1
F
0.1
F
VDD
RCL
UVLO
RSENSE
100m
R1
2k
R2
2k
100
20
M1
IRF640N
VIN
(36V TO 72V)
NT
NR
NP
NS
CIN
VCC
CS
V-
3
0.47
F
L1
4.7
H
FB
GATE
OUT
PGOOD
MAX5942
V+
GND
GATE
1nF
6
CMHD2003
1N4148
14
SBL204OCT
(OPTIONAL)
CFB
SS_SHDN
14
5
VEE
25.5k
RCL
Figure 5. Forward Converter
相關(guān)PDF資料
PDF描述
EKK8301 Low-Voltage, Single Supply, SPST, High Performance Analog Switches; Temperature Range: -40&deg;C to 85&deg;C; Package: 8-SOIC T&amp;R
EKM6211 Ultra Low ON-Resistance, Single Supply, Dual SPST Analog Switches; Temperature Range: -40&deg;C to 85&deg;C; Package: 8-MSOP
EKM8003 Ultra Low ON-Resistance, Single Supply, Dual SPST Analog Switches; Temperature Range: -40&deg;C to 85&deg;C; Package: 8-MSOP T&amp;R
EKM8021 Ultra Low ON-Resistance, Single Supply, Dual SPST Analog Switches; Temperature Range: -40&deg;C to 85&deg;C; Package: 8-MSOP T&amp;R
EKM8022 Ultra Low ON-Resistance, +1.1V to +4.5V Single Supply, SPDT Analog Switch; Temperature Range: -40&deg;C to 85&deg;C; Package: 6-SC-70 T&amp;R
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EKK8011AB 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:USB & PS/2 Keyboard Encoder
EKK8301 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PS/2 keyboard controller
EKK-EVALBOT 功能描述:開(kāi)發(fā)板和工具包 - ARM Keil Stellaris Eval Robot RoHS:否 制造商:Arduino 產(chǎn)品:Development Boards 工具用于評(píng)估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口類型:DAC, ICSP, JTAG, UART, USB 工作電源電壓:3.3 V
EKK-LM3S1968 功能描述:開(kāi)發(fā)板和工具包 - ARM Stellaris Eval Kit w/ ARM/Keil Tools RoHS:否 制造商:Arduino 產(chǎn)品:Development Boards 工具用于評(píng)估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口類型:DAC, ICSP, JTAG, UART, USB 工作電源電壓:3.3 V
EKK-LM3S1968 制造商:Texas Instruments 功能描述:LM3S1968 MCU Eval Kit w/ Keil RealView M
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