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AC/DC & DC/DC controllers (external FET)

UC3578

不推荐用于新设计

降压脉宽调制器步降稳压器

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UC3578 不推荐用于新设计
虽然我们会继续生产此产品供先前的设计使用，但不推荐在新设计中使用此产品。请考虑从这些替代产品中选择一款：
open-in-new 比较替代产品
功能与比较器件相同但引脚有所不同
LM5145 正在供货 具有宽输入电压范围和占空比范围的 75V 同步降压控制器 Voltage mode controller with adjustable switching frequency
功能与比较器件相似
TPSM365R3 正在供货 3-65V 输入 1-13V 输出 0.3A 同步降压转换器电源模块 Save board space, simplify design and speed time to market with an integrated-inductor power module.

UC3578

不推荐用于新设计
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产品详情

Vin (min) (V) 11 Vin (max) (V) 72 Iout (max) (A) 0.2 Operating temperature range (°C) 0 to 70 Control mode Voltage mode Rating Catalog Vout (min) (V) 5 Vout (max) (V) 62 Iq (typ) (A) 0.01 Duty cycle (max) (%) 100
Vin (min) (V) 11 Vin (max) (V) 72 Iout (max) (A) 0.2 Operating temperature range (°C) 0 to 70 Control mode Voltage mode Rating Catalog Vout (min) (V) 5 Vout (max) (V) 62 Iq (typ) (A) 0.01 Duty cycle (max) (%) 100
SOIC (D) 16 59.4 mm² 9.9 x 6
  • Provides Simple Single Inductor Buck PWM Step-Down Voltage Regulation
  • Drives External High Side NMOS Switch
  • 14V to 72V Input Voltage Operating Range
  • Contains 100kHz Internal Oscillator, 2V Reference and UVLO
  • Soft Start on Power Up
  • Overcurrent Shutdown Followed by Soft Start
  • Provides Simple Single Inductor Buck PWM Step-Down Voltage Regulation
  • Drives External High Side NMOS Switch
  • 14V to 72V Input Voltage Operating Range
  • Contains 100kHz Internal Oscillator, 2V Reference and UVLO
  • Soft Start on Power Up
  • Overcurrent Shutdown Followed by Soft Start

The UC3578 is a PWM controller with an integrated high side floating gate driver. It is used in buck step down converters and regulates a positive output voltage. Intended to be used in a distributed power system, the IC allows operation from 14V to 72V input voltage which range includes the prevalent telecomm bus voltages. The output duty cycle of the UC3578 can vary between 0% and 90% for operation over the wide input voltage and load conditions.

The UC3578 simplifies the design of the single switch PWM buck converter by incorporating a floating high side driver for an external N-channel MOSFET switch. It also features a 100kHz fixed frequency oscillator, an internal 2V precision reference, an error amplifier configured for voltage mode operation, and a PWM comparator with latching logic. Complementing the traditional voltage mode control block, the UC3578 incorporates an overcurrent shutdown circuit with full cycle soft re-start to limit the input current to a user defined maximum value during overload operation. Additional functions include an under voltage lockout circuit to insure that sufficient input supply voltage is present before any switching activity can occur.

The UC2578 and the UC3578 are both available in surface mount and thru-hole power packages.

The UC3578 is a PWM controller with an integrated high side floating gate driver. It is used in buck step down converters and regulates a positive output voltage. Intended to be used in a distributed power system, the IC allows operation from 14V to 72V input voltage which range includes the prevalent telecomm bus voltages. The output duty cycle of the UC3578 can vary between 0% and 90% for operation over the wide input voltage and load conditions.

The UC3578 simplifies the design of the single switch PWM buck converter by incorporating a floating high side driver for an external N-channel MOSFET switch. It also features a 100kHz fixed frequency oscillator, an internal 2V precision reference, an error amplifier configured for voltage mode operation, and a PWM comparator with latching logic. Complementing the traditional voltage mode control block, the UC3578 incorporates an overcurrent shutdown circuit with full cycle soft re-start to limit the input current to a user defined maximum value during overload operation. Additional functions include an under voltage lockout circuit to insure that sufficient input supply voltage is present before any switching activity can occur.

The UC2578 and the UC3578 are both available in surface mount and thru-hole power packages.
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类型 标题 下载最新的英语版本 日期
* 数据表 Buck Pulse Width Modulator Stepdown Voltage Regulator 数据表 1999年 9月 5日
用户指南 UC3578 Telecom Buck Converter Reference Design 2001年 10月 16日

设计和开发

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封装 引脚 下载
SOIC (D) 16 查看选项
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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