Primary Side Regulation Green Mode PWM Power Switch  
Part No. Features Function BVDSS
(MIN.)
VCC
(Max)
UVLO (Typ.) CS O/P W
(90~264V_charger)
FOSC Package
RDS(on) IST
(Typ)
Vcc(ON) Vcc(OFF) Typ.  Green Typ.
US1651 PRIMARY-SIDE REGULATION PWM POWER SWITCH

* Programmable CV and CC regulation
* Adjustable constant current and
    output power setting
* Built-in leading edge blanking (LEB)
* VDD under voltage lockout
* Cycle-by-Cycle current limiting
* Auto-restart in over voltage condition
Flyback Converters, Build-in MOSFET CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc. 650V 33V 15.0V 8.5V 0.82V  5W - SOP-8
12Ω 5uA 22KHz 50KHz
US2351 HIGH PRECISION LOW COST MCM POWER SWITCH

* Power on soft-start
* Built-in error amplifier
* Built-in Leading Edge Blanking (LEB)
* Cycle-by-Cycle current limiting
* Over loading protection
* Output short-circuit protection
* VDD OVP

CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc.
600V 40V 13.5V 7.8V 0.94V  Vout=12V
Pout4.8W
- SOP-8
15Ω 5uA - 60KHz
US2651 HIGH PRECISION LOW COST MCM POWER SWITCH

* Power on soft-start
* Built-in error amplifier
* Built-in Leading Edge Blanking (LEB)
* Cycle-by-Cycle current limiting
* Over loading protection
* Output short-circuit protection
* VDD Under Voltage Lockout with hysteresis (UVLO)
* VDD OVP
Flyback Converters,
Hopping Technology,Build-in MOSFET
CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc.
600V 40V 14.5V 8.5V 0.86V  Vout=19V
Pout4.8W
- DIP-8 SOP-8
15Ω 35uA - 50KHz
US3651 High Precision CC/CV Primary-Side PWM Power Switch

* Built-in 600V Power MOSFET
* Programmable CV and CC regulation
* Programmable cable compensation
    in CV mode
* Flyback topology in DCM operation
* Built-in leading edge blanking
* Cycle-by-cycle current limiting
* VDD under-voltage lockout
Flyback Converters,
Hopping Technology,Build-in MOSFET
CC/CV, PFM, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc.
600V 30V 14.5V 9.0V 0.9V  5W Min.CCMDCM DIP-8 SOP-8
15Ω 5uA 370Hz13KHz55KHz
US3652 High Precision CC/CV Primary-Side PWM Power Switch

* Built-in 600V Power MOSFET
* Programmable CV and CC regulation
* Programmable cable compensation
    in CV mode
* Flyback topology in DCM operation
* Built-in leading edge blanking
* Cycle-by-cycle current limiting
* VDD under-voltage lockout
Flyback Converters,
Hopping Technology,Build-in MOSFET
CC/CV, PFM, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc.
600V 28V 14.5V 9.0V 0.9V 15W Min.CCMDCM DIP-8 DIP-7A
5uA 300Hz17KHz65KHz
USR3651 * Built-in 650V Power MOSFET
* ±5% constant voltage regulation at
    universal AC input
* High precision constant current regulation
    at universal AC input
* Programmable CV and CC regulation
* Programmable cable compensation in
    CV mode
* Flyback topology in DCM operation
* Built-in primary winding inductance
    compensation
* Cycle-by-cycle current limiting
Flyback Converters,
Hopping Technology,Build-in MOSFET
CC/CV, PFM, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc.
650V 28V 14.5V 9.0V 0.91V 5W Min.CCMDCM SOP-8
7.5Ω 5uA 370Hz17KHz65KHz
USR3651S High Precision CC/CV Primary-Side PWM Power Switch

* High Voltage startup
* Built-in 600V Power MOSFET
* Programmable CV and CC regulation
* Programmable cable compensation in
    CV mode
* Flyback topology in DCM operation
* Built-in leading edge blanking
* Cycle-by-cycle current limiting
Flyback Converters, Build-in MOSFET CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc. 650V 28V 14.5V 9.0V 0.91V 5W Min.CCMDCM DIP-8 SOP-8
10Ω 700uA
(HV)
300Hz17KHz65KHz
USR3652 HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH

* Built-in 650V Power MOSFET
* ±5% constant voltage regulation at universal AC input
* High precision constant current regulation
   at universal AC input
* Programmable cable compensation in
   CV mode
* Frequency hopping to reduce system EMI
* Built-in primary winding inductance
    compensation
Flyback Converters, Build-in MOSFET CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc. 650V 28V 14.5V 9.0V 0.91V  12W Min.CCMDCM SOP-8
5uA 370Hz17KHz65KHz
USR3652S High Precision CC/CV Primary-Side PWM Power Switch

* High Voltage startup circuit
* Built-in 650V Power MOSFET
* Programmable cable compensation in CV mode
* Flyback topology in DCM operation
* Built-in leading edge blanking
* Cycle-by-cycle current limiting
Flyback Converters, Build-in MOSFET CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc. 650V 28V 14.5V 9.0V 0.91V  12W Min.CCMDCM DIP-8
700uA
(HV)
370Hz17KHz65KHz
USR3654A HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH

* High Voltage startup circuit
* ±5% constant voltage regulation at universal
    AC input
* High precision constant current regulation
    at universal AC input
* Programmable CV and CC regulation
* Programmable cable compensation in CV mode
* Flyback topology in DCM operation
* Frequency hopping to reduce system EMI
Flyback Converters,
Hopping Technology,
Build-in MOSFET
and build in OVP, OTP, OCP, OLP, UVLO, SCP, LEB, Soft Start Etc.
650V 28V 14.5V 9.0V 0.92V 15W Min.CCMDCM DIP-7A DIP-8
3.1Ω - 600Hz35KHz125KHz
USRB01A High Precision CC/CV Primary-Side PWM Power Switch

* Flyback topology in DCM operation
* Built-in power NPN
* Built-in leading edge blanking
* Open circuit protection
* Output over voltage protection
* VDD over voltage protection
* Short circuit protection
* Over temperature protection
Flyback Converters, Build-in BJT CC/CV, PFM, And build in OVP, OLP, UVLO, OCP, SCP, LEB Etc. VCEO=
450V
30V 12.5V 6.8V 0.5V  5W - SOP-8
- 1uA -
USRB04 HIGH PRECISION PRECISION LOW POWER SWITCH

* Universal AC input range and 5.0V output voltage
* Constant power mode operation at over
    load application
* Low cost and less BOM for buck and
    buck-boost applications
* 40kHz (typical) maximum switching frequency
* Frequency shuffling for EMI improvement
* Cycle-by-cycle current limiting
* FB pin open loop protection
Build-in BJT , And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft-Start Etc. 450V 20V 11.5V 3.7V 0.575V  - Freq=40KHz SOP-8
- 10uA Butst_Mode=20KHz
UCSR3654 High Precision CC/CV Primary-Side PWM Power Switch

* Built-in 650V Power MOSFET
* ±5% constant voltage regulation at universal
    AC input
* High precision constant current regulation
    at universal AC input
* Programmable CV and CC regulation
* Programmable cable compensation in CV mode
* Flyback topology in DCM operation
* Frequency hopping to reduce system EMI
* Cycle-by-cycle current limiting
Flyback Converters, Build-in MOSFET CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc. 650V 28V 14.5V 9.0V 0.90V  12W Min.CCMDCM DIP-8 SOP-8
1.6Ω 5uA 300Hz17KHz65KHz
UCSR3651S High Precision CC/CV Primary-Side PWM Power Switch

* High Voltage startup circuit
* Built-in 650V Power MOSFET
* Programmable CV and CC regulation
* Programmable cable compensation in CV mode
* Built-in leading edge blanking
* Power on soft start
* Cycle-by-cycle current limiting
Flyback Converters, Build-in MOSFET CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc. 650V 28V 14.5V 9.0V 0.90V  8W Min.CCMDCM DIP-7A SOP-8
700uA
(HV)
300Hz17KHz65KHz
UCSR3652S High Precision CC/CV Primary-Side PWM Power Switch

* High Voltage startup circuit
* Built-in 650V Power MOSFET
* Programmable CV and CC regulation
* Programmable cable compensation in CV mode
* Built-in leading edge blanking
* Power on soft start
* Cycle-by-cycle current limiting
Flyback Converters, Build-in MOSFET CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc. 650V 28V 14.5V 9.0V 0.90V  12W Min.CCMDCM DIP-7A SOP-8 DIP-8
2.4Ω 700uA
(HV)
300Hz17KHz65KHz
UCSR3654S High Precision CC/CV Primary-Side PWM Power Switch

* High Voltage startup circuit
* Built-in 650V Power MOSFET
* Programmable CV and CC regulation
* Programmable cable compensation in CV mode
* Built-in leading edge blanking
* Power on soft start
* Cycle-by-cycle current limiting
Flyback Converters, Build-in MOSFET CC/CV, And build in OVP, OLP, UVLO, OCP, SCP, LEB, Soft Start Etc. 650V 28V 14.5V 9.0V 0.90V  15W Min.CCMDCM DIP-7A DIP-8
1.6Ω 700uA
(HV)
300Hz17KHz65KHz
PSRB05 Low Power Off-Line CC/CV Primary Side Power
Switch

* Built-in 800V Power BJT
* High precision constant current regulation at universal AC input
* Programmable cable compensation in CV mode
* Programmable line voltage compensation
* 75mW standby power consumption
* Frequency hopping to reduce system EMI
* Built-in leading edge blanking
* Open circuit protection
* Over voltage protection
DCM Flyback Converters,
Hopping Technology,Driver BJT Switch
CC/CV, PWM+PFM, and build in OVP, OLP, UVLO, OCP, SCP, LEB Etc.
VCBO=
800V
30 15.5V 4.5V 0.5V - - SOP-8
- 0.5uA -
Black: Under  Development