產(chǎn)品信息

特性

• 100µa typical starting supply current
• 500µa typical operating supply current
• operation to 1mhz
• internal soft start
• internal fault soft start
• internal leading-edge blanking of the current sense signal
• 1 amp totem-pole output
• 70ns typical response from current-sense to gate drive output
• 1.5% tolerance voltage reference
• same pinout as ucc3802, uc3842, and uc3842a

說明

the ucc3813-0/-1/-2/-3/-4/-5 family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and dc-to-dc fixed frequency current-mode switching power supplies with minimal parts count.

these devices have the same pin configuration as the uc3442/3/4/5 family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

the ucc3813-0/-1/-2/-3/-4/-5 family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of critical voltage levels. lower reference parts such as the ucc3813-3 and ucc3813-5 fit best into battery operated systems, while the higher reference and the higher uvlo hysteresis of the ucc3813-2 and ucc3813-4 make thsese ideal choices for use in off-line power supplies.

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