TI,TI公司,TI代理商
TI(德州仪器)| TI产品型号搜索
专营TI元器件,强大的现货交付能力,解决您的采购难题
全流程提供TI现货供应链服务
当前位置:TI公司 > > TI芯片 >> UC3827-2
UC3827-2技术文档下载:
UC3827-2技术文档产品手册下载
UC3827-2 - 产品图解:
UC3827-2-降电流/电压馈送推拉 PWM 控制器
承诺原装正品
专营TI,真正优化您的供应链
TI产品 - UC3827-2介绍
UC3827-2 - 降电流/电压馈送推拉 PWM 控制器

UC3827-2是TI公司的一款PWM与谐振控制器产品,UC3827-2是降电流/电压馈送推拉 PWM 控制器,本页介绍了UC3827-2的产品说明、应用、特性等,并给出了与UC3827-2相关的TI元器件型号供参考。

UC3827-2 - 降电流/电压馈送推拉 PWM 控制器 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - TI公司(Texas Instruments,德州仪器)

产品描述

The UC3827 family of controller devices provides an integrated control solution for cascaded buck and push-pull converters. These converters are known as current fed or voltage fed push-pull converters and are ideally suited for multiple output and/or high voltage output applications. In both current fed and voltage fed modes, the push-pull switches are driven at 50% nominal duty cycles and at one half the switching frequency of the buck stage. In the current fed mode, the two switches are driven with a specified over-lap period to prevent ringing and voltage stress on the devices. In the voltage fed mode, the two switches are driven with a specified gap time between the switches to prevent shorting the transformer across the energy storage capacitor and to prohibit excessive currents flowing through the devices.

The converter's output voltage is regulated by pulse width modulation of the buck switch. The UC3827 contains complete protection and PWM control functions for the buck converter. Easy control of the floating switch is accomplished by the floating drive circuitry. The gate drive waveform is level shifted to support an input voltage up to 72 VDC.

The UC3827 can be set up in traditional voltage mode control using input voltage feedforward technique or in current mode control. Using current mode control prevents potential core saturation of the push-pull transformer due to mismatches in timing and in component tolerances. With average current mode control, precise control of the inductor current feeding the push-pull stage is possible without the noise sensitivity associated with peak current mode control. The UC3827 average current mode loop can also be connected in parallel with the voltage regulation loop to assist only in fault conditions.

Other valuable features of the UC3827 include bidirectional synchronization capability, user programmable overlap time (UC3827-1), user programmable gap time (UC3827-2), a high bandwidth differential current sense amplifier, and soft start circuitry.

产品特性

  • Ideal for Multiple Output and/or High Voltage Output Voltage Converters
  • Up to 500 kHz Operation
  • High Voltage, High Current Floating Driver for Buck Converter Stage
  • UC3827-1 Current Fed Controller has Push-Pull Drivers with Overlapping Conduction Periods
  • UC3827-2 Voltage Fed Controller has Push-Pull Drivers with Nonoverlapping Conduction Periods
  • Average Current Mode, Peak Current Mode or Voltage Mode with Input Voltage Feedforward Control for Buck Power Stage
  • Wide Bandwidth, Low Offset, Differential Current Sense Amplifier
  • Precise Short Circuit Current Control

下面可能是您感兴趣的TI公司PWM与谐振控制器元器件
  • TRSF23243 - 3V 至 5.5V 双路 RS-232 端口
  • SN5447A - BCD 到 7 段解码器/驱动器
  • DS110DF1610 - DS110DF1610 8.5 至 11.3 Gbps 16 通道重定时器
  • SN75ALS164 - 八路通用接口总线收发器
  • DAC8168 - 具有 2.5V、2ppm/℃ 内部参考的 14 位、八通道、超低短时脉冲波形干扰、电压输出 DAC
  • CSD85312Q3E - 双路 20V N 通道 NexFET? 功率 MOSFET,CSD85312Q3E
  • TPS62008 - 采用 MSOP-10 封装的 1.9V 600mA 输出的 95% 效率步降转换器
  • ADS7891 - 具有 Ref 引脚的 2.7V-5.25V 数字 5V 模拟 14 位 3MSP 并行 ADC
  • SN74ALVCH162268 - 具有三态输出的 12 位至 24 位寄存总线交换器
  • TLV62065 - 采用 2x2 SON 封装的 3MHz、2A 降压转换器
  • 节约时间成本,提高采购效率,TI官网授权代理
    TI公司|TI德州仪器|德州仪器TI公司代理商|TI芯片代理商
    TI公司产品现货专家,订购TI公司产品不限最低起订量,TI产品大陆现货即时发货,香港库存3-5天发货,海外库存7-10天发货
    寻找全球TI代理商现货货源 - TI公司(德州仪器)电子元件在线订购