illustrate

The UCC38C4x family is a high performance current mode PWM controller. This is an enhanced version of BiCMOS with pin-to-pin compatibility with the industry standard UC384xA family and the UC384x family of PWM controllers. In addition, the 7 volt low-voltage version is offered for start-up as the UCC38C40 and UCC38C41.

Providing the necessary functions to control fixed-frequency, peak current mode power supplies, this series offers the following performance benefits. The device provides high operating frequencies up to one low start-up and operating current megahertz, resulting in improved efficiency, minimized start-up losses, and low operating power consumption. The device also features a very fast current detection output delay time of 35 nanoseconds and ±1 improved peak output rise and fall times with the ability to drive large currents directly external MOSFETs.

characteristic

• Enhanced home and replacement UC3842A pin-to-pin compatibility
• 1 - MHz operation
• 50μA start-up current, 100μA maximum
• Low operating 2.3 mA current of 52 kHz
• Cycle overcurrent protection with fast 35 ns cycle
• Peak output current ± 1
• Rail Times 25-ns rise and 20 nanosecond rail output swing fall
• ± 1% initial side 2.5-V error amplifier reference
• Side vibration discharge current
• The new version of low voltage lockout
• The MSOP-8 package reduces board space
• apply
  • Switching power supply
  • DC-DC converters
  • Board mount the power module