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UC3845BN

UC3845BN
型号:UC3845BN
品牌:ON ON
批号:13+RoHS
封装:DIP
原价:1.3
数量:24510
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详细描述

UC3845BN

HIGH PERFORMANCE CURRENT MODE CONTROLLERS
 
 
 
The UC3844B, UC3845B series are high performance fixed
frequency current mode controllers. They are specifically designed for
Off−Line and dc−dc converter applications offering the designer a
cost−effective solution with minimal external components. These
integrated circuits feature an oscillator, a temperature compensated
reference, high gain error amplifier, current sensing comparator, and a
high current totem pole output ideally suited for driving a power
MOSFET.
Also included are protective features consisting of input and
reference undervoltage lockouts each with hysteresis, cycle−by−cycle
current limiting, a latch for single pulse metering, and a flip−flop
which blanks the output off every other oscillator cycle, allowing
output deadtimes to be programmed from 50% to 70%.
These devices are available in an 8−pin dual−in−line and surface
mount (SOIC−8) plastic package as well as the 14−pin plastic surface
mount (SOIC−14). The SOIC−14 package has separate power and
ground pins for the totem pole output stage.
The UCX844B has UVLO thresholds of 16 V (on) and 10 V (off),
ideally suited for off−line converters. The UCX845B is tailored for
lower voltage applications having UVLO thresholds of 8.5 V (on) and
7.6 V (off).
 
 
Features
Pb−Free Packages are Available
Trimmed Oscillator for Precise Frequency Control
Oscillator Frequency Guaranteed at 250 kHz
Current Mode Operation to 500 kHz Output Switching Frequency
Output Deadtime Adjustable from 50% to 70%
Automatic Feed Forward Compensation
Latching PWM for Cycle−By−Cycle Current Limiting
Internally Trimmed Reference with Undervoltage Lockout
High Current Totem Pole Output
Undervoltage Lockout with Hysteresis
Low Startup and Operating Current
 
 
 
Because of wholesale price is different from sample price, our website ca not state Please send your required part number via emai to Sales@hkmjd com or add our skype id mjdccm898 for online talking  As we as welcome you ca us : 0755-83957301 We wi send offer for you;  Sometimes manufacturer's price is unstable,so we don't adjust price i time  if you fee price is a little high for you,just fee free to contact us for consultatio  Thank you for your support !
 
 
 
批发与零售价位不同,无法一一明示,详情请通过邮件或客服咨询(国内销售部电话:0755-83957301,企业QQ: 2850151585), 由于电子元器件价格不稳定,时常有稍许变动,本公司未能及时调整,如您觉得售价不适,请与我们说明并适当议价,谢谢支持。
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