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首页产品索引UC2844B

UC2844B

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 High Performance Current Mode PWM Controller

制造商:ON

中文数据手册

产品信息

The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-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 (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-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).
  • 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
  • Pb-Free Packages are Available

在线购买

型号制造商描述购买
UC2844BD1R2GON高性能电流模式控制器 立即购买
UC2844BDR2GON 立即购买
UC2844BNGON高性能电流模式控制器 立即购买

技术资料

标题类型大小(KB)下载
High Performance Current Mode ControllerPDF393 点击下载
SOIC-8 Narrow BodyPDF61 点击下载
SOIC-14 NBPDF33 点击下载
8 LEAD PDIPPDF34 点击下载

应用案例更多案例

系列产品索引查看所有产品

UC1825A-DIEUSB2642UCD90910UC1846-DIE
UCD90120AUC3844BUCC1800-DIEUSB2660
UC2843BUSB1T1103UC3843BUCD3138128
USB2228USB2640ULN2003USB2602
UCD90320USB2641UAA2016UC2845B
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