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 1MHz 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.

The UCC28C4x family is offered in the 8-pin SOIC (D) package.

• 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