UCC28063DR Texas Instruments MCU

UCC28063DR Overview

Optimized for consumer applications concerned with audible noise elimination, this solution extends the advantages of transition mode – high efficiency with low-cost components – to higher power ratings than previously possible. By utilizing a Natural Interleaving technique, both channels operate as masters (that is, there is no slave channel) synchronized to the same frequency. This approach delivers inherently strong matching, faster responses, and ensures that each channel operates in transition mode.

Expanded system level protections feature input brownout and dropout recovery, output over-voltage, open-loop, overload, soft-start, phase-fail detection, and thermal shutdown. The additional FailSafe over-voltage protection (OVP) feature protects against shorts to an intermediate voltage that, if undetected, could lead to catastrophic device failure. Advanced non-linear gain results in rapid, yet smoother response to line and load transient events. Reduced bias currents improve stand-by power efficiency. Special line-dropout handling avoids significant current disruption and minimizes audible-noise generation.

Features

Input Filter and Output Capacitor Ripple-Current Cancellation
- Reduced Current Ripple for Higher System Reliability and Smaller Bulk Capacitor
- Reduced EMI Filter Size
Phase Management Capability
Fail-Safe OVP with Dual Paths Prevents Output Overvoltage Conditions by Voltage-Sensing Failures
Sensorless Current-Shaping Simplifies Board Layout and Improves Efficiency
Advanced Audible Noise Performance
Non-linear Error-Amplifier Gain
Soft Recovery on Overvoltage
Integrated Brownout and Dropout Handling
Reduced Bias Currents
Improved Efficiency and Design Flexibility Over Traditional Single-Phase Continuous Conduction Mode (CCM)
Inrush-Safe Current Limiting:
- Prevents MOSFET Conduction During Inrush
- Eliminates reverse Recovery Events in Output rectifiers
Enables Use of Low-Cost Diodes Without Extensive Snubber Circuitry
Improved Light-Load Efficiency
Fast, Smooth Transient Response
Expanded System-Level Protections
1-A Source/1.8-A Sink Gate Drivers
–40°C to 125°C Operating Temperature Range in a 16-Lead SOIC Package