High-Performance PWM Controller

UCC28C44DR Features and Applications

Looking for a high-performance PWM controller? The UCC28C44DR is everything you've been looking for! It's packed with features that make it perfect for a fixed-frequency peak-current-mode power supply. This device boasts improved efficiency thanks to its low-power consumption, faster current sensing, and oscillator frequency.

Operating at a maximum frequency of 1MHz, the UCC28C44DR has a reduced startup and operating current to minimize losses and provide better efficiency. Plus, the device features 35ns cycle-by-cycle overcurrent limiting for excellent overload protection and ±1-A peak output current capability with improved rise and fall times to drive large external MOSFETs directly. The UCC28C44DR comes in a compact VSSOP-8 package for space-saving applications.

Features:

• Operating frequency: 1 MHz Maximum
• Startup current: 50-μA (100-μA Maximum)
• Low operating current: 2.3 mA (at fOSC = 52 kHz)
• Cycle-by-cycle overcurrent limiting: 35-ns
• Peak driving current: ±1-A
• Rail-to-rail output: - Rise time: 25-ns
• Fall time: 20-ns - ±1% accurate 2.5-V error amplifier reference
• Trimmed oscillator discharge current
• Undervoltage lockout protections
• VSSOP-8 package minimizes board space

Applications:

• Switch-mode power supplies
• General purpose single-ended DC-DC or off-line isolated power converters
• Board mount power modules