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参数资料
| 型号： | MAX8540EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 82% |
| 电源电压： | 7.6 V ~ 18 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 是 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
19-2830; Rev 0; 4/03
Synchronizable, High-Frequency Current- and
Voltage-Mode PWM Controllers for Isolated Supplies
General Description
The MAX8540/MAX8541 pulse-width-modulated (PWM)
controllers for forward/flyback isolated DC-to-DC convert-
ers provide maximum flexibility to power-supply design-
ers and reduce external component count. These
controllers allow common PC board layout for current-
mode (MAX8540) and voltage-mode (MAX8541) designs.
Both controllers feature adjustable switching frequency
and external synchronization from 200kHz to 1MHz.
Active-high and active-low enable, undervoltage pro-
tection (UVP), and overvoltage protection (OVP) reduce
external component count.
Maximum duty cycle is adjustable, and the feed-forward
function scales the maximum duty cycle with input volt-
age to limit the maximum volt-seconds applied to the
transformer primary. The MAX8540 allows the user to
select the value of slope compensation to further opti-
mize magnetics design. The MAX8541 features user-
adjustable ramp magnitude for the PWM comparator.
A cycle-by-cycle current-limit function controls the peak
primary current during overload and short circuit. Both
controllers can be set to latch off or to hiccup when a
short circuit is detected. The number of current-limited
cycles to initiate the hiccup mode and number of
cycles skipped are user selectable to allow startup with
high-capacitance loads and protect the converter
against sustained short circuits.
Features
? 200kHz to 1MHz Adjustable Switching Frequency
? Synchronization to External Clock
? Programmable, Constant Maximum Volt-Second
Simplifies Transformer Design
? Programmable Hiccup/Skip Cycles or Latch-Mode
Protection
? Clean Startups with High-Capacitance Loads
? Programmable Under/Overvoltage Protection
? Current-Mode, Adjustable Slope Compensation
(MAX8540)
? Voltage-Mode, Adjustable Ramp Magnitude
(MAX8541)
? 10mA, 5V Regulator
? 75mV to 1.25mV Adjustable Current Limit
Reduces External Components
? Internal Gate Driver for Low-Power Applications
? External Gate Driver for High-Power Applications
Ordering Information
The MAX8540/MAX8541 feature 9 ? internal gate dri-
vers for low-power applications and are compatible
with external gate drivers for high-power applications.
Both devices are available in the space-saving 16-pin
PART
MAX8540 EEE
MAX8541 EEE
TEMP RANGE
-40 ° C to +85 ° C
-40 ° C to +85 ° C
PIN-PACKAGE
16 QSOP
16 QSOP
QSOP package.
The MAX8541 EV kit evaluates the MAX8540 and the
MAX8541 to speed designs. Design examples are also
available in application notes: 50W Voltage-Mode
Forward Converter Design with the MAX8541 and 50W
Current-Mode Forward Converter Design with the
TOP VIEW
Pin Configurations
MAX8540.
Applications
REF 1
OV 2
16 V CC
15 DRV
Isolated DC-to-DC Modules (Bricks)
UV 3
14 GND
Cellular Base Stations
Telecom and Network Systems
High-Performance Off-Line AC/DC Converters
FREQ/SYNC 4
SS 5
MAXDTY 6
EN 7
SCOMP 8
MAX8540EEE
13 SKTON
12 CS
11 SKTOFF
10 ILIM
OPTO
9
QSOP
Functional Diagrams and Typical Operating Circuit appear
at end of data sheet.
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8541EEE | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8541EEE+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8541EEE-T | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8543EEE | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8543EEE+ | 功能描述:电流型 PWM 控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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