• - 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

UCC38C4x family is a high-performance current-mode PWM controller. It is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UC384xA family and UC384x family of PWM controllers. In addition, lower startup voltage versions of 7 V are offered as UCC38C40 and UCC38C41.

Providing necessary features to control fixed frequency, peak current-mode power supplies, this family offers the following performance advantages. The device offers 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 device also features a very 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

• Enhanced Replacement for UC3842A Family With Pin-to-Pin Compatibility
• 1-MHz Operation
• 50-µA Start-Up 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 Under Voltage Lockout Versions
• MSOP-8 Package Minimizes Board Space
• APPLICATIONS
  • Switch-Mode Power Supplies
  • dc-to-dc Converters
  • Board Mount Power Modules