Optimized for consumer applications concerned with audible noise elimination, this solution extends the advantages of transition modehigh efficiency with low-cost componentsto 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.
●Complete system-level protections feature input brownout, 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.
● NATURAL INTERLEAVING FEATURES
● Easy Phase Management Facilitates Compliance to Light-Load Efficient Standards
● FailSafe OVP with Dual Paths Prevents Output Over-Voltage Conditions Caused by Voltage-Sensing Failures
● Sensorless Current Shaping Simplifies Board Layout and Improves Efficiency
● Inrush Safe Current Limiting:
● Prevents MOSFET conduction during inrush
● Eliminates reverse recovery events in output rectifiers
● SYSTEM FEATURES
● Improved Audible Noise Performance
● Soft Start on Overvoltage
● Integrated Brownout
● Improved Efficiency and Design Flexibility over Traditional, Single-Phase Continuous Conduction Mode (CCM)
● Input Filter and Output Capacitor Current Cancellation:
● Reduced current ripple for higher system reliability and smaller bulk capacitor
● Reduced EMI filter size
● Enables Use of Low-Cost Diodes without Extensive Snubber Circuitry
● Improved Light-Load Efficiency
● Improved Transient Response
● Complete System-Level Protection
● 1-A Source/1.8-A Sink Gate Drivers
● APPLICATIONS
● 100-W to 800-W Power Supplies
● Gaming
● D to A Set Top Boxes
● Adapters
● LCD, Plasma and DLP TVs
● Home Audio Systems
●DLP is a trademark of Texas Instruments.
●Natural Interleaving is a trademark of Texas Instuments.
