UC1100 Ver la hoja de datos (PDF) - Unisonic Technologies
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UC1100 Datasheet PDF : 6 Pages
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UNISONIC TECHNOLOGIES CO., LTD
UC1100
Preliminary
CMOS IC
LOW-POWER HIGH PRECISION
CC/CV PRIMARY SIDE
SWITCHING REGULATOR
DESCRIPTION
The UTC UC1100 is a primary control unit for switch mode
charger and adapter applications. The controlled variable is
transferred by an auxiliary winding from the secondary to the
primary side. The device uses Pulse Frequency Modulation (PFM)
method to build discontinuous conduction mode (DCM) flyback
power supplies.
The UTC UC1100 operates in primary-side sensing and
regulation. Opto-coupler and TL431 could be eliminated. It also
eliminates the need of loop compensation circuitry while
maintaining stability. The UTC UC1100 achieves excellent
regulation and high average efficiency, yet meets the requirement
for no-load consumption less than 30mW.
The UTC UC1100 achieves high precision CV/CC regulation
and high power efficiency. It offers comprehensive protection
coverage with auto-recovery features including Cycle-by-cycle
current limiting, output over voltage protection, feedback loop open
protection, short circuit protection, leading edge blanking, VCC
under voltage lockout, etc.
FEATURES
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SOT-26
* Primary side control for rectangular constant current and * Random frequency modulation to reduce system EMI
constant voltage output
* Flyback topology in DCM operation
* 30mW no-load input power feasible
* Open feedback protection
* Tight CC regulation performance
* Built-in soft start
* Sub-microampere start-up current
* Short circuit protection
* Eliminates control loop compensation circuitry
* Eliminates opto-coupler and secondary CV/CC control
circuitry
ORDERING INFORMATION
Ordering Number
UC1100G-AG6-R
Package
SOT-26
Packing
Tape Reel
www.unisonic.com.tw
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