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UPSRB03 Datasheet Preview

UPSRB03 Datasheet

HIGH PRECISION CC/CV PRIMARY SIDE SWITCHING REGULATOR

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UNISONIC TECHNOLOGIES CO., LTD
UPSRB03
Preliminary
LINEAR INTEGRATED CIRCUIT
HIGH PRECISION CC/CV
PRIMARY SIDE SWITCHING
REGULATOR
DESCRIPTION
The UTC UPSRB03 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 multi-mode operations to achieve
high performance and high efficiency. Device operations in PFM
in CC mode at large load condition and it operates in PWM with
frequency reduction at light/medium load which can cancel audio
noise.
The UTC UPSRB03 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 UPSRB03 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, VDD over voltage
protection, feedback loop open protection, short circuit protection,
leading edge blanking, VDD under voltage lockout, etc.
FEATURES
* Multi-Mode control for cancel audio noise
* ±5% constant voltage regulation at universal AC input
* Primary side control without TL431 and opto-coupler
* High precision constant current regulation at universal AC input
* Programmable CV and CC regulation
* Eliminates control loop compensation circuitry
* Flyback topology in DCM operation
* Driver BJT switch
* Built-in Line CC compensation
* Built-in leading edge blanking
* Driver soft start
* Built-in primary winding inductance
compensation
* Open circuit protection
* Output over voltage protection
* VDD over voltage protection
* Short circuit protection
ORDERING INFORMATION
Ordering Number
UPSRB03G-AF5-R
Package
SOT25
Packing
Tape Reel
UPSRB03G-AF5-R
(1)Packing Type
(2)Package Type
(3)Green Package
(1) R: Tape Reel
(2) AF5: SOT-25
(3) G: Halogen Free and Lead Freee
www.unisonic.com.tw
Copyright © 2016 Unisonic Technologies Co., Ltd
1 of 7
QW-R129-020.a




UTC

UPSRB03 Datasheet Preview

UPSRB03 Datasheet

HIGH PRECISION CC/CV PRIMARY SIDE SWITCHING REGULATOR

No Preview Available !

UPSRB03
MARKING
Preliminary
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
VDD FB
54
1 23
GND CS BASE
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
PIN NAME
GND
CS
BASE
FB
VDD
DESCRIPTION
Ground
Current sense input.
Base drive for power BJT.
The voltage feedback from the auxiliary winding
Power supply
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 7
QW-R129-020.a


Part Number UPSRB03
Description HIGH PRECISION CC/CV PRIMARY SIDE SWITCHING REGULATOR
Maker UTC
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UPSRB03 Datasheet PDF






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