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MAX5095AAUA+*

更新时间： 2024-11-03 03:17:23
品牌 Logo 应用领域
美信 - MAXIM 控制器
页数 文件大小 规格书
22页 296K
描述
High-Performance, Single-Ended, Current-Mode PWM Controllers

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19-3864; Rev 3; 10/06  
High-Performance, Single-Ended, Current-Mode  
PWM Controllers  
General Description  
Features  
The MAX5094A/B/C/D/MAX5095A/B/C BiCMOS, high-  
performance, current-mode PWM controllers have all the  
features required for wide input-voltage range  
isolated/nonisolated power supplies. These controllers  
are used for low- and high-power universal input volt-  
age and telecom power supplies.  
♦ Pin-for-Pin Replacement for UCC28C43  
(MAX5094A) and UCC28C45 (MAX5094B)  
♦ 2A Drive Source and 1A Sink Capability  
♦ Up to 1MHz Switching Frequency Operation  
♦ Bidirectional Frequency Synchronization  
(MAX5095A/MAX5095B)  
The MAX5094/MAX5095 contain a fast comparator with  
only 60ns typical delay from current sense to the output  
for overcurrent protection. The MAX5094 has an inte-  
grated error amplifier with the output at COMP. Soft-  
start is achieved by controlling the COMP voltage rise  
using external components.  
♦ Advanced Output Drive for Secondary-Side  
Synchronous Rectification (MAX5095C)  
♦ Fast 60ns Cycle-by-Cycle Current Limit  
♦ Trimmed Oscillator Capacitor Discharge Current  
Sets Maximum Duty Cycle Accurately  
The oscillator frequency is adjustable from 20kHz to  
1MHz with an external resistor and capacitor. The tim-  
ing capacitor discharge current is trimmed allowing for  
programmable dead time and maximum duty cycle for  
a given frequency. The available saw-toothed waveform  
♦ Accurate 5ꢀ Start ꢁoltage with 0ꢂ8ꢁ Hysteresis  
♦ Low 32µA Startup Current  
♦ 5ꢁ Regulator Output (REF) with 20mA Capability  
♦ ꢁersions with 0ꢂ3ꢁ Current-Sense Threshold  
♦ Overtemperature Shutdown  
at R C can be used for slope compensation when  
T
T
needed.  
The MAX5095A/MAX5095B include a bidirectional syn-  
chronization circuit allowing for multiple controllers to  
run at the same frequency to avoid beat frequencies.  
Synchronization is accomplished by simply connecting  
the SYNC of all devices together. When synchronizing  
with other devices, the MAX5095A/MAX5095B with the  
highest frequency synchronizes the other devices.  
Alternatively, the MAX5095A/MAX5095B can be syn-  
chronized to an external clock with an open-drain out-  
put stage running at a higher frequency.  
Ordering Information  
PIN-  
PKG  
PART  
TEMP RANGE  
PACKAGE CODE  
MAX5094AASA  
MAX5094AASA+  
MAX5094AAUA*  
MAX5094AAUA+  
MAX5094BASA*  
MAX5094BASA+  
MAX5094BAUA*  
MAX5094BAUA+  
-40°C to +125°C 8 SO  
-40°C to +125°C 8 SO  
-40°C to +125°C 8 µMAX  
-40°C to +125°C 8 µMAX  
-40°C to +125°C 8 SO  
-40°C to +125°C 8 SO  
-40°C to +125°C 8 µMAX  
-40°C to +125°C 8 µMAX  
S8-4  
S8-4  
U8-1  
U8-1  
S8-4  
S8-4  
U8-1  
U8-1  
The MAX5095C provides a clock output pulse  
(ADV_CLK) that leads the driver output (OUT) by  
110ns. The advanced clock signal is used to drive the  
secondary-side synchronous rectifiers.  
The MAX5094A/B/C are available in the 8-pin SO and  
+Denotes lead-free package.  
*Future product—contact factory for availability.  
Ordering Information continued at end of data sheet.  
®
8-pin µMAX  
packages. The MAX5094D and  
MAX5095A/B/C are available in the 8-pin µMAX pack-  
age. All devices operate over the automotive tempera-  
ture range of -40°C to +125°C.  
Pin Configurations  
Applications  
TOP VIEW  
Universal Input AC/DC Power Supplies  
Isolated Telecom Power Supplies  
Isolated Power-Supply Modules  
Networking Systems  
COMP  
FB  
1
2
3
4
8
7
6
5
REF  
V
CC  
MAX5094  
CS  
OUT  
GND  
Computer Systems/Servers  
Industrial Power Conversion  
Isolated Keep-Alive Circuits  
R /C  
T
T
µMAX/SO  
Pin Configurations continued at end of data sheet.  
µMAX is a registered trademark of Maxim Integrated Products, Inc.  
________________________________________________________________ Maxim Integrated Products  
1
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.  
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MAX5095BAUA-T MAXIM

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MAX5095CAUA* MAXIM

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MAX5095CAUA+ MAXIM

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