UCC28C43 - Texas Instruments

UCC28C43 BiCMOS Low-Power Current-Mode PWM Controller

The UCCx8C4x family are high-performance, current-mode PWM controllers. The UCCx8C4x is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UCx84xA family and UCx84x family of PWM controllers. The BiCMOS technology offers lower power consumption to improve efficiency as well as faster current sense and oscillator frequency. VIN.

Features

• Enhanced replacement for UCx84x and UCx84xA family with pin-to-pin compatibility
• Operating frequency: 1MHz Maximum
• 50μA Startup Current, 100μA Maximum
• Low operating current: 2.3mA (at fOSC = 52kHz)
• Fast, cycle-by-cycle overcurrent limiting: 35ns
• Peak driving current: ±1A. Rail-to-rail output:
  – 25ns rise time
  – 20ns fall time
• ±1% accurate 2.5V error amplifier reference
• Trimmed oscillator discharge current
• Undervoltage lockout protections
• VSSOP-8 package minimizes board space 2 Applications
• Switch-mode power supplies
• General purpose single-ended DC-DC or off-line isolate.