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UC3849
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UC3849

  • 所属类别：ACDC-和-DCDC-电源
  • 产品名称：二次侧平均电流模式控制器
  • 厂商：TI
  • 生产批号：09+
  • 封装：24SOIC
  • 库存状态：有库存
  • 库存量：2530
  • 最低订购量：1
  • 详细资料：点击查找UC3849的pdf资料
  • 点击询价
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  • Product Introduction

The average current mode controller UC3849 accurately completes the home average current mode control on the secondary side. The secondary output voltage is regulated by detecting the output voltage and the differential sensing AC switching current. The detected output voltage drives the voltage error amplifier. AC switching current, monitored by a current-sense resistor, drives a high-bandwidth, low-offset current-sense amplifier. The output of the error amplifier drives a high-bandwidth differential that integrates existing error amplifiers. The output of the current error amplifier is the detection of the amplified and reverse inductor current passing through the resistance. This inductor current drop slope is achieved by implementing PWM ramp compensation, which gives an accurate and inherently fast transient response to changes in load.

characteristic
 
  • Practical secondary control ofIsolated power supply
  • 1 MHz operation
  • AC switching current detection differentiation
  • Precisely programmable maximum duty cycle
  • Multiple chips can be synchronized to the fastest oscillator
  • Wide gain bandwidth product (70 MHz, access control list "10) current error and current sense amplifier
  • Up to ten devices can easily share the common negative
parameter
    UC3849
Duty Cycle (Max) (%)   85
Frequency (max) (kHz)   1000
Pin/Pack   24SOIC
(#) Regulated output   One
Operating Temperature Range (°C)   0 to 70

The ICs associated with UC3849 include:


Model Manufacturers lot number encapsulation illustrate
DP83849IVS/NOPB   10+11+   Hong Kong spot, imported original
DP83849IDVS/NOPB   10+11+   Hong Kong spot, imported original
63849-1 TYCO 10+ N/A Brand new original import, Hong Kong spot
DP83849IVSX NSC 10+ TQFP-80 Ethernet physical layer transceiver
DP83849IDVS NSC 10+ TRAY Ethernet physical layer transceiver
DP83849IFVSX NSC 10+ N Ethernet physical layer transceiver
DP83849IFVS NSC 10+ TQFP-80 Ethernet physical layer transceiver
DP83849IVS NSC 10+ TQFP-80 Dual PHYTER industrial temperature with flexible port switching Dual-port 10/100 Mb/s Ethernet physical layer transceiver
UC3849DW TI 01+ SOP-24 Brand new original
TMP47C433AN3849 Toshiba 03+ DIP-42 Brand new original
UC3849 TI 09+ 24SOIC Secondary side average current mode controller

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