• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The UCC28C4x family are high performance current-mode PWM controllers. They are enhanced BiCMOS versions with pin-for-pin compatibility to the industry standard UC284xA family and UC284x family of PWM controllers. In addition, a lower startup voltage versions of 7 V is offered as UCC28C41.

Providing necessary features to control fixed frequency, peak current mode power supplies, this family offers several performance advantages. These devices offer high frequency operation up to 1 MHz with low start up and operating currents, thus minimizing start up loss and low operating power consumption for improved efficiency. The devices also feature a fast current sense to output delay time of 35 ns, and a ±1-A peak output current capability with improved rise and fall times for driving large external MOSFETs directly.

特性

• Qualified for Automotive Applications
• Enhanced Replacements for UC2842A Family With Pin-to-Pin Compatibility
• 1-MHz Operation
• 50-µA Standby Current, 100-µA Maximum
• Low Operating Current of 2.3 mA at 52 kHz
• Fast 35-ns Cycle-by-Cycle Overcurrent Limiting
• ±1-A Peak Output Current
• Rail-to-Rail Output Swings With 25-ns Rise and 20-ns Fall Times
• ±1% Initial Trimmed 2.5-V Error Amplifier Reference
• Trimmed Oscillator Discharge Current
• New Undervoltage Lockout Versions
• APPLICATIONS
  • Switch Mode Power Supplies
  • DC-to-DC Converters
  • Board Mount Power Modules