Texas Instruments
德州仪器 (TI) 是一家开发模拟 IC 和嵌入式处理器的全球半导体设计和制造公司。 通过聘用世界上最聪明的人才,TI 创造了塑造技术未来的创新。 今天,TI 正在帮助超过 100,000 家客户改变未来。
查看所有产品从 Texas InstrumentsThe UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.
The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.
The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.
The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.
类型 | 描述 | 全选 |
---|---|---|
产品状态 | 停产 | |
时钟同步 | 无 | |
同步整流器 | 无 | |
频率 - 开关 | 最高 500kHz | |
电压 - 供电 (Vcc/Vdd) | 10V ~ 30V | |
输出阶段 | 1 | |
供应商器件封装 | 14-SOP | |
输出数 | 1 | |
封装/外壳 | 14-SOIC(0.209",5.30mm 宽) | |
拓扑 | Boost, Buck, Buck-Boost, Flyback, Forward | |
安装类型 | 表面贴装型 | |
输出配置 | 正,可提供隔离 | |
工作温度 | 0°C ~ 70°C(TA) | |
功能 | 升压,降压,升压/降压 | |
控制特性 | 频率控制 | |
输出类型 | 晶体管驱动器 | |
包装 | 管件 | |
占空比(最大) | 48% |
Texas Instruments
德州仪器 (TI) 是一家开发模拟 IC 和嵌入式处理器的全球半导体设计和制造公司。 通过聘用世界上最聪明的人才,TI 创造了塑造技术未来的创新。 今天,TI 正在帮助超过 100,000 家客户改变未来。
查看所有产品从 Texas InstrumentsUC3844 CURRENT-MODE PWM CONTROLL
SWITCHING CONTROLLER
SWITCHING CONTROLLER
IC REG CTRLR PWM CM 14-SOIC
IC REG CTRLR PWM CM 8SOIC
IC REG CTRLR PWM CM 14-SOIC
IC REG CTRLR PWM CM 8SOIC
IC REG CTRLR MULT TOPOLOGY 16DIP
IC REG CTRLR MULT TOP 16SOIC
IC REG CTRLR BUCK 14TSSOP