Secondary Side Regulation Green Mode PWM Controller  
Part No. Features Function VCC UVLO (Typ.) IST CS(V) Duty Cycle FOSC Package
Max. Vcc(ON) Vcc(OFF) Typ.  Typ.  Max. Green Typ.
UC3800/B LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS

* Dynamic peak current limiting for constant output power
* OTP,OLP,OVP, LNO-OV, Brownout and VDD
   clamp for higher security
* Fixed switch frequency 65kHz
* Low start-up current
* Cycle-by-cycle Current Limiting
Flyback Converters,  HV Start and build in OLP,UVLO,OCP, SCP, LEB. 30.0V 18.5V 7.0V 2uA 0.97V 85% Internal Fixed  SOP-8
19KHz 65KHz
UC3837 Low Cost Power-Saving Mode PWM Controller for Flyback Converters

* Dynamic peak current limiting for constant output power
* OTP,OLP,OVP and VDD clamp for higher security
* Fixed switch frequency 65kHz
* Low start-up current
* Cycle-by-cycle Current Limiting
Flyback Converters,
Hopping Technology &
Frequency BurstPFMPWM,
and build in OVP,OLP,UVLO,OCP, SCP,
LEB, Soft Start, OTP, BNO Etc.
23.0V 14.5V 8.5V 5uA 0.65V 75%(Typ.) Internal Fixed  SOT-26
22KHz 65KHz
UC3848 High Performance Power-Saving Mode PWM Controllers

* Soft Start
* Over Temperature Protection
* Overload Protection
* Over Voltage Protection
* Leading Edge Blanking
* Cycle-by-Cycle Current Limiting
Flyback Converters,
Hopping Technology
Frequency BurstPFMPWM,
and build in OVP,OLP,UVLO,OCP, SCP,
LEB, OTP, Soft Start Etc.
30.0V 14.2V 8.2V 22uA 0.86V 80% Internal Fixed  DIP-8 SOP-8
20KHz 68KHz
UC3849* Power-Saving Mode PWM Controllers Flyback Converters,
Hopping Technology &
Frequency BurstPFMPWM,
and build in OVP,OLP,UVLO,OCP, SCP, LEB, and OTP sense by RT pin, Frequency By RI Pin.
36.0V 16.5V 9.7V 4uA 0.97V 85% Internal Fixed  DIP-8 SOP-8
20KHz 65KHz
UC3849B LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS

* Dynamic peak current limiting for constant output power
* Built-in synchronized slope compensation
* Programming OTP for higher security
* Cycle-by-cycle Current Limiting
* Under voltage lockout (UVLO)
* Few external components required
Flyback Converters,
Hopping Technology
Frequency BurstPWM,
and build in OVP,OLP,UVLO,OCP, SCP, LEB, OTP, Soft Start Etc.
36.0V 18.0V 7.0V 2uA 0.92V 90% Internal Fixed  DIP-8 SOP-8
20KHz 65KHz
UC3853A CURRENT MODE PWM CONTROLLER FOR FORWARD AND FLYBACK APPLICATIONS

* Peak Current Mode Control
* Adjustable Internal Ramp Compensation
* Jittering Frequency ±6% of the Switching Frequency
* Power-saving mode for high standby efficiency
* Delayed Operation Upon Start−up via an Internal
  Fixed Timer
Flyback Converters,
Hopping Technology
build in OVP,OLP,UVLO,OCP, SCP, LEB, OTP, Soft Start Etc.
29.0V 10.0V 9.0V 5uA 0.96V 50% Internal Fixed SOP-8
- 100KHz
UC3856 Low Cost Power-Saving Mode PWM Controller For Fly-Back Converters

* Dynamic peak current limiting for constant output power
* Built-in synchronized slope compensation
* OTP,OLP,OVP and VDD clamp for higher security
* High efficiency HV start
* Cycle-by-cycle current limiting
* Few external components required
Flyback Converters,
Hopping Technology &
Frequency BurstPFMPWM,
HV Start and build in OLP,UVLO,OCP, SCP, LEB.
35.0V 19.0V 7.0V 2uA 0.65V 90% Internal Fixed SOT-26
20KHz 65KHz
UC3863 Low Cost Power-Saving Mode PWM Controller for Flyback Converters

* Built-in synchronized slope compensation
* OTP,OLP,OVP and VDD clamp for higher security
* Programmable PWM Frequency
* Cycle-by-cycle Current Limiting
* Few external components required
Flyback Converters,
Hopping Technology &
Frequency BurstPFMPWM,
and build in OVP,OLP,UVLO,OCP, SCP, LEB, OTP, Soft Start Etc.
30.0V 13.5V 8.0V 2.5uA 0.95V 85% RI=100KΩ  DIP-8 SOP-8 SOT-26
23KHz 65KHz
UC3863A Low Cost Power-Saving Mode PWM Controller for Flyback Converters

* Built-in synchronized slope compensation
* OTP,OLP,OVP and VDD clamp for higher security
* Programmable PWM Frequency
* Cycle-by-cycle Current Limiting
* Few external components required
Flyback Converters,
Hopping Technology &
Frequency BurstPFMPWM,
and build in OVP,OLP,UVLO,OCP, SCP, LEB, OTP, Soft Start Etc.
36.0V 18.0V 7.0V 2.0uA 0.92V 90% RI=100KΩ  HSOP-8 SOP-8 SOT-26
20KHz 65KHz
UC3869A HIGH VOLTAGE GREEN MODE PWM CONTROLLER

* High voltage startup
* Power on soft start reducing MOSFET Vds stress
* Efficiency and minimum standby power
* Audio noise free operation
* Fixed 65 kHz switching frequency
Flyback Converters, HV Start
and build in OVP,OLP,UVLO,OCP, SCP, LEB, and OTP sense by RT pin
36.0V 18.0V 7.0V 2uA 0.92V 90% Internal Fixed DIP-8 SOP-8
20KHz 65KHz
UC3869H HIGH VOLTAGE GREEN MODE PWM CONTROLLER

* High voltage startup
* Power on soft start reducing MOSFET Vds stress
* Efficiency and minimum standby power
* Audio noise free operation
* Fixed 100 kHz switching frequency
Flyback Converters, HV Start
and build in OVP,OLP,UVLO,OCP, SCP, LEB, and OTP sense by RT pin
36.0V 18.0V 7.0V 2uA 0.92V 90% Internal Fixed DIP-8 SOP-8
20KHz 100KHz
UC3873 Low Cost Power-Saving Mode PWM Controller for Flyback Converters

* Dynamic peak current limiting for constant output power
* Built-in synchronized slope compensation
* OLP, OVP and VDD clamp for higher security
* Programming OTP for higher security
* Cycle-by-cycle Current Limiting
* Few external components required
Flyback Converters,
Hopping Technology &
Frequency BurstPFMPWM,
OTP sense by RT pin, Fixed Frequency
and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start Etc.
30.0V 13.8V 8.2V 2.5uA 0.92V 76%(TYP) Internal Fixed  SOT-26
22KHz 65KHz
UC3873H LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS

* Dynamic peak current limiting for constant output power
* Built-in synchronized slope compensation
* OTP and OVP( automatic recovery)
* Programming OTP for higher security
* Few external components required
Flyback Converters,
Hopping Technology &
Frequency BurstPFMPWM,
OTP sense by RT pin, Fixed Frequency
and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start Etc.
36.0V 18.0V 7.0V 2.0uA 0.92V 90% Internal Fixed SOT-26
20KHz 100KHz
UC3873A Low Cost Power-Saving Mode PWM Controller for Flyback Converters

* Dynamic peak current limiting for constant output power
* Built-in synchronized slope compensation
* OLP, OVP and VDD clamp for higher security
* Programming OTP for higher security
* Cycle-by-cycle Current Limiting
* Few external components required
Flyback Converters,
Hopping Technology &
Frequency BurstPFMPWM,
OTP sense by RT pin, Fixed Frequency
and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start Etc.
36.0V 18.0V 7.0V 2.0uA 0.92V 90% Internal Fixed SOT-26
20KHz 65KHz
UC3873B Low Cost Power-Saving Mode PWM Controller for Flyback Converters

* Dynamic peak current limiting for constant output power
* Built-in synchronized slope compensation
* OLP, OVP and VDD clamp for higher security
* Programming OTP for higher security
* Cycle-by-cycle Current Limiting
* Few external components required
Flyback Converters,
Hopping Technology &
Frequency BurstPFMPWM,
OTP sense by RT pin, Fixed Frequency
and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start Etc.
30.0V 13.0V 7.0V 2.5uA 0.95V 78%(TYP) Internal Fixed SOT-26
22KHz 100KHz
UC3875A LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS with latch up

* Dynamic peak current limiting for constant output power
* Built-in synchronized slope FBensation
* OTP,OLP,OVP and VDD clamp for higher security
* Programmable PWM Frequency
* Cycle-by-cycle Current Limiting
* Few external FBonents required
Flyback Converters, HV Start
and build in OLP,UVLO,OVP,LEB, Frequency By RI Pin.
36.0V 18.0V 7.0V 0.75mA
(ST_Pin)
0.92V 90% RI=100KΩ  DIP-8 SOP-8
20KHz 65KHz
UC3883 HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER WITH PEAK LOAD

* Power on Soft Start Reducing MOSFET VDS Stress
* Frequency shuffling for EMI
* Extended Burst Mode Control For Improved Efficiency
   and Minimum Standby Power Design
* Audio Noise Free Operation
* Frequency Triple for peak load (180KHz)
* Adjustable Overload Protection (OLP) delay time
Flyback Converters,
build in OLP,UVLO,OVP,LEB,
Soft Start Etc.
36.0V A:20V
B:15.3V
8.2V 1.5uA 0.88 85% Internal Fixed SOT-26
20 65
*Under  Development