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ISL78841ASEHVX

更新时间： 2024-11-29 11:59:07
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英特矽尔 - INTERSIL 控制器
页数 文件大小 规格书
15页 810K
描述
Radiation Hardened, High Performance Industry Standard Single-Ended Current Mode PWM Controller

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ISL78841ASEHVX 数据手册

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Radiation Hardened, High Performance Industry  
Standard Single-Ended Current Mode PWM Controller  
ISL78840ASEH, ISL78841ASEH, ISL78843ASEH, ISL78845ASEH  
The ISL7884xASEH is a high performance, radiation hardened  
Features  
drop-in replacement for the popular 28C4x and 18C4x PWM  
controllers suitable for a wide range of power conversion  
applications including boost, flyback, and isolated output  
configurations. Its fast signal propagation and output  
• Electrically Screened to DLA SMD # 5962-07249  
• QML Qualified Per MIL-PRF-38535 Requirements  
switching characteristics make this an ideal product for  
existing and new designs.  
• 1A MOSFET Gate Driver  
• 90µA Typical Start-up Current, 125µA Max  
• 35ns Propagation Delay Current Sense to Output  
• Fast Transient Response with Peak Current Mode Control  
• 9V to 13.2V Operation  
Features include up to 13.2V operation, low operating current,  
90µA typical start-up current, adjustable operating frequency  
to 1MHz, and high peak current drive capability with 50ns rise  
and fall times.  
• Adjustable Switching Frequency to 1MHz  
• 50ns Rise and Fall Times with 1nF Output Load  
PART NUMBER  
ISL78840ASEH  
ISL78841ASEH  
ISL78843ASEH  
ISL78845ASEH  
RISING UVLO  
MAX. DUTY CYCLE  
7.0  
7.0  
100%  
50%  
• Trimmed Timing Capacitor Discharge Current for Accurate  
Deadtime/Maximum Duty Cycle Control  
8.4V  
8.4V  
100%  
50%  
• 1.5MHz Bandwidth Error Amplifier  
• Tight Tolerance Voltage Reference Over Line, Load and  
Temperature  
Specifications for Rad Hard QML devices are controlled by the  
Defense Logistics Agency Land and Maritime (DLA). The SMD  
numbers listed in the ordering information must be used when  
ordering.  
• ±3% Current Limit Threshold  
• Pb-Free Available (RoHS Compliant)  
• Radiation Environment:  
- High Dose Rate (50 - 300rad(Si)/s). . . . . . . . . 100 krad(Si)  
- Low Dose Rate (0.01rad(Si)/s). . . . . . . 100 krad(Si) (Note)  
Detailed Electrical Specifications for the ISL788xASEH are  
contained in SMD 5962-07249. A “hot-link” is provided on our  
website for downloading.  
NOTE: Product capability established by initial characterization. The  
“EH” version is acceptance tested on a wafer by wafer basis to 50  
krad(Si) at low dose rate.  
Applications  
• Current Mode Switching Power Supplies  
• Isolated Buck and Flyback Regulators  
• Boost Regulators  
• Direction and Speed Control in Motors  
• Control of High Current FET Drivers  
Pin Configurations  
ISL78840ASEH, ISL78841ASEH,  
ISL78843ASEH, ISL78845ASEH  
(8 LD FLATPACK)  
ISL78840ASEH, ISL78841ASEH,  
ISL78843ASEH, ISL78845ASEH  
(8 LD SBDIP)  
TOP VIEW  
TOP VIEW  
COMP  
FB  
1
2
3
4
8
7
6
5
V
V
REF  
COMP  
FB  
1
2
3
4
8
7
6
5
V
V
REF  
DD  
DD  
CS  
OUT  
GND  
CS  
OUT  
GND  
RTCT  
RTCT  
May 29, 2012  
FN7952.0  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2012. All Rights Reserved  
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.  
All other trademarks mentioned are the property of their respective owners.  
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