UC2844AD8TR

The UCx84xA series of fixed-frequency pulse-width modulation (PWM) controllers are designed to operate at a switching frequency of 500kHz. These controllers are designed for peak current mode (PCM) and can be used in both isolated and non-isolated power supply designs. These controllers can drive FETs directly from the output, capable of sourcing and sinking up to 1A of gate drive current. These devices also feature a built-in low-impedance amplifier, which can be used in non-isolated designs to control the power supply output voltage and feedback loop.

Applications

• Switched-Mode Power Supplies (SMPS)
• DC/DC Converters
• Power Modules
• Industrial PSUs
• Battery-Powered PSUs

Key features

• Optimized for off-line and DC/DC converters
• Low startup current (< 0.5mA)
• Trimmed oscillator discharge current
• Automatic feedforward compensation
• Pulse-by-pulse current limiting
• Enhanced load response characteristics
• Undervoltage lockout with hysteresis
• Double pulse suppression
• High-current totem-pole output
• Internally trimmed bandgap reference
• Operating frequency up to 500kHz