USRB01 Datasheet, PDF (1/7 Pages) Unisonic Technologies – HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH

UNISONIC TECHNOLOGIES CO., LTD
USRB01
Preliminary
LINEAR INTEGRATED CIRCUIT
HIGH PRECISION CC/CV
PRIMARY SIDE SWITCH
 DESCRIPTION
The UTC USRB01 is a primary controller for 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 USRB01 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 USRB01 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, V_DD over voltage
protection, feedback loop open protection, short circuit protection,
leading edge blanking, OTP, V_DD under voltage lockout, etc.
 FEATURES
SOP-8
* ±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
* Random frequency modulation to reduce system EMI
* Built-in power NPN
 ORDERING INFORMATION
* Programmable cable drop compensation
* Built-in leading edge blanking
* Built-in primary winding inductance compensation
* Open circuit protection
* Output over voltage protection
* VDD over voltage protection
* Short circuit protection
* Over temperature protection
Ordering Number
USRB01G-S08-R
Package
SOP-8
Packing
Tape Reel
USRB01G-S08-R
 MARKING
(1)Packing Type
(2)Package Type
(3)Green Package
(1) R: Tape Reel
(2) S08: SOP-8
(3) G: Halogen Free and Lead Free
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