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UC1108 Scheda tecnica(PDF) 1 Page - Unisonic Technologies

Il numero della parte UC1108
Spiegazioni elettronici  LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
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Produttore elettronici  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC1108 Scheda tecnica(HTML) 1 Page - Unisonic Technologies

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UNISONIC TECHNOLOGIES CO., LTD
UC1108
Preliminary
CMOS IC
www.unisonic.com.tw
1 of 8
Copyright © 2015 Unisonic Technologies Co., Ltd
QW-R103-098.a
LOW-POWER OFF-LINE
PRIMARY SIDE REGULATION
CONTROLLER
DESCRIPTION
The UTC UC1108 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 UC1108 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
UC1108
achieves excellent regulation and high average efficiency, yet
meets the requirement for no-load consumption less than 30mW.
The UTC UC1108 has the built-in programmable cable voltage
drop compensation function, which make it flexible to accommodate
various cables with different gauges and lengths
The UTC UC1108 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
* 30mW No-load Input Power
* Primary side control for eliminating opto-coupler and secondary
CV/CC control circuitry
* Proprietary CC tightening technique to achieve vertical CC profile
* Programmable output cable voltage drop compensation
* Compensation for external component temperature variations
* Random frequency adjustment to reduce system EMI
* Flyback topology in DCM operation
* Built-in soft start
* Over voltage protection
* Short circuit protection
SOP-8
ORDERING INFORMATION
Ordering Number
Package
Packing
UC1108G-S08-R
SOP-8
Tape Reel
UC1108G-S08-R
(1)Packing Type
(2)Package Type
(1) R: Tape Reel
(2) S08: SOP-8
(3) G: Halogen Free and Lead Free
(3)Green Package


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