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UC2572D PDF预览

UC2572D

更新时间: 2024-11-06 02:58:39
品牌 Logo 应用领域
德州仪器 - TI 开关光电二极管
页数 文件大小 规格书
9页 289K
描述
Negative Output Flyback Pulse Width Modulator

UC2572D 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:SOIC
包装说明:SOP,针数:8
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:6 weeks
风险等级:0.69Is Samacsys:N
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:30 V
最小输入电压:4.75 V标称输入电压:5 V
JESD-30 代码:R-PDSO-G8JESD-609代码:e4
长度:4.9 mm湿度敏感等级:1
功能数量:1端子数量:8
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:0.7 A最大输出电压:-1 V
最小输出电压:-70 V封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1.75 mm
表面贴装:YES切换器配置:SINGLE
最大切换频率:200 kHz温度等级:INDUSTRIAL
端子面层:Nickel/Palladium/Gold (Ni/Pd/Au)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:3.9 mm
Base Number Matches:1

UC2572D 数据手册

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UC1572  
UC2572  
UC3572  
Negative Output Flyback Pulse Width Modulator  
FEATURES  
DESCRIPTION  
Simple Single Inductor Flyback PWM  
for Negative Voltage Generation  
The UC3572 is a negative output flyback pulse width modulator which con-  
verts a positive input voltage to a regulated negative output voltage. The  
chip is optimized for use in a single inductor negative flyback switching con-  
verter employing an external PMOS switch. The block diagram consists of  
a precision reference, an error amplifier configured for voltage mode opera-  
tion, an oscillator, a PWM comparator with latching logic, and a 0.5A peak  
gate driver. The UC3572 includes an undervoltage lockout circuit to insure  
sufficient input supply voltage is present before any switching activity can  
occur, and a pulse-by-pulse current limit. Output current can be sensed and  
limited to a user determined maximum value. The UVLO circuit turns the  
chip off when the input voltage is below the UVLO threshold. In addition, a  
sleep comparator interfaces to the UVLO circuit to turn the chip off. This re-  
duces the supply current to only 50µA, making the UC3572 ideal for battery  
powered applications.  
Drives External PMOS Switch  
Contains UVLO Circuit  
Includes Pulse-by-Pulse Current Limit  
Low 50µA Sleep Mode Current  
BLOCK DIAGRAM  
UDG-94094-2  
SLUS275A - MARCH 1999 - REVISED AUGUST 2001  

UC2572D 替代型号

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