UCC2807-3中文资料具有 4.3V/4.1V UVLO、可编程占空比、温度范围为 –40°C 至 85°C 的经济型低功耗 BICMOS 1MHz 电流模式 PWM数据手册TI规格书

描述 Description

The UCC3807 family of high speed, low power integrated circuits contains all of the control and drive circuitry required for off-line and dc-to-dc fixed frequency current mode switching power supplies with minimal external parts count.These devices are similar to the UCC3800 family, but with the added feature of a user programmable maximum duty cycle. Oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor. The UCC3807 family also features internal full cycle soft start and internal leading edge blanking of the current sense input.The UCC3807 family offers a variety of package options, temperature range options, and choice of critical voltage levels. The family has UVLO thresholds and hysteresis levels for off-line and battery powered systems. Thresholds are shown in the table below.

特性 Features

• User Programmable Maximum PWM Duty Cycle
• 100-A Startup Current
• Operation to 1 MHz
• Internal Full Cycle Soft Start
• Internal Leading Edge Blanking of Current Sense Signal
• 1-A Totem Pole Output