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參數(shù)資料
| 型號(hào)： | MAX5021EUT |
| 廠(chǎng)商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | Current-Mode PWM Controllers for Isolated Power Supplies |
| 中文描述： | 0.25 A SWITCHING CONTROLLER, 290 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | MO178, SOT-23, 6 PIN |
| 文件頁(yè)數(shù)： | 8/11頁(yè) |
| 文件大?。?/td> | 240K |
| 代理商： | MAX5021EUT |
M
WARNING! DANGEROUS AND LETHAL VOLTAGES
ARE PRESENT IN OFF-LINE CIRCUITS! USE
EXTREME CAUTION IN THE CONSTRUCTION,
TESTING, AND USE OF OFF-LINE CIRCUITS.
Isolated Telecom Power Supply
Figure 4 shows a -48VDC telecom power supply capa-
ble of generating an isolated +5V output.
Layout Recommendations
All printed circuit board traces carrying switching cur-
rents must be kept as short as possible, and the cur-
rent loops they form must be minimized. The pins of the
SOT23 package have been placed to allow simple
interfacing to the external MOSFET. The order of these
pins directly corresponds to the order of a TO-220 or
similar package MOSFET.
For universal AC input design all applicable safety reg-
ulations must be followed. Off-line power supplies may
require UL, VDE, and other similar agency approvals.
These agencies can be contacted for the latest layout
and component rules.
Typically there are two sources of noise emission in a
switching power supply: high di/dt loops and high dv/dt
surfaces. For example, traces that carry the drain cur-
rent often form high di/dt loops. Similarly the heatsink of
the MOSFET presents a dv/dt source, thus the surface
area of the heatsink must be minimized as much
as possible.
To achieve best performance, a star ground connection
is recommended to avoid ground loops. For example,
the ground returns for the power-line input filter, power
MOSFET switch, and sense resistor should be routed
separately through wide copper traces to meet at a sin-
gle system ground connection.
Chip Information
TRANSISTOR COUNT: 519
PROCESS: BiCMOS
Current-Mode PWM Controllers for Isolated
Power Supplies
8
_______________________________________________________________________________________
MAX5022
-36VDC TO -72VDC IN
T1
R
S
V
OUT
C2
C3
OPTO
NDRV
CS
V
CC
V
IN
GND
Figure 4. -48VDC Input to +5V Output
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| MAX5022 | Current-Mode PWM Controllers for Isolated Power Supplies |
| MAX5022EPA | Current-Mode PWM Controllers for Isolated Power Supplies |
| MAX5022EUA | Current-Mode PWM Controllers for Isolated Power Supplies |
| MAX5022EUT | Current-Mode PWM Controllers for Isolated Power Supplies |
| MAX5022EVKIT | Current-Mode PWM Controllers for Isolated Power Supplies |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5021EUT+ | 制造商:Maxim Integrated Products 功能描述:CURRENT MODE PWM CNTRLR 250MA 6PIN SOT-23 - Rail/Tube |
| MAX5021EUT+T | 功能描述:電流型 PWM 控制器 for Isolated Power Supplies RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX5021EUT-T | 功能描述:電流型 PWM 控制器 for Isolated Power Supplies RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX5021EVKIT | 功能描述:電源管理IC開(kāi)發(fā)工具 MAX5021 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX5022 | 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Current-Mode PWM Controllers for Isolated Power Supplies |
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