UCC28063DR.B中文资料德州仪器数据手册PDF规格书

1 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

• 1A Source/1.8A sink gate drivers

• –40°C to 125°C Operating Temperature Range in

a 16-Lead SOIC Package

2 Applications

• 100-W to 800-W power supplies

• Gaming

• D-to-A set-top boxes

• Adapters

• LCD, Plasma and DLP™ TVs

• Home audio systems

3 Description

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 audiblenoise

generation.