Secondary Side Regulation Green Mode PWM Controller
Part No.	Features	Function	VCC	UVLO (Typ.)		IST	CS(V)	Duty Cycle	FOSC		Package
			Max.	VTH(ST)	VOPR	Typ.	Typ.	Max.	Green	Typ.
UC3800	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	13.0V	7.0V	2uA	0.95V	85%	VFB=3.5V		SOP-8
									22KHz	62KHz
UC3830G	Power Saving PWM with frequency modulation for EMI reducing	Flyback Converters, Hopping Technology & Frequency Burst→PFM→PWM, Fixed Frequency, 300mA Driving Capability and build in OVP,OLP,UVLO, OCP, SCP, LEB, OTP, Soft Start Etc.	30.0V	16.0V	10.0V	5uA	0.85V	75%	Internal Fixed		DIP-8 SOT-26
									20KHz	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 Burst→PFM→PWM, 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)	VFB=3.5V		SOT-26
									22KHz	65KHz
UC3833L	ADVANCED GREEN-MODE PWM CONTROLLER WITH FREQUENCY TRIPLE FOR PEAK POWER * Frequency triple for peak power (195kHz) * Adjustable soft start time * Adjustable OLP (over load protection) delay timer(automatic recovery) * LEB (Leading-Edge Blanking) on CS Pin * Current mode control with Green Mode Operation out pin clamping	Flyback Converters,and build in OVP,OLP sense by CT pin,UVLO,OCP, SCP, LEB, Soft Start, OTP Etc.	32.0V	20.0V	8.0V	2uA	0.92V	90%(Typ)	-		SOT-26
									20KHz	65KHz
UC3837L	Low Cost Power-Saving Mode PWM Controller for Flyback Converters with latched shut down * Dynamic peak current limiting for constant output power * OLP with automatic recovery * OTP and OVP * VDD clamp for higher security * Low start-up current * Cycle-by-cycle current limiting	Flyback Converters, Hopping Technology & Frequency Burst→PFM→PWM, and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start, OTP, BNO Etc.	30.0V	20.0V	8.0V	2uA	0.92V	90%(Typ)	VFB=3.5V		SOT-26
									20KHz	65KHz
UC3839*	Power-Saving Mode PWM  Controller with BNO And OTP Protection	Flyback Converters, Hopping Technology & Frequency Burst→PFM→PWM, BNO,OTP Protection Pin, Adj OVP, OCP Pin and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start, Etc.	27.0V	16.0V	7.5V	9uA	0.85V	80%	Internal Fixed		DIP-8 SOT-26
									21.5KHz	65KHz
UB3846	Power-Saving Mode PWM  Controller	Flyback Converters, Hopping Technology & Frequency Burst→PFM→PWM, OVP,OLP,OTP,UVLO,OCP, SCP, LEB, Etc.	25.0V	16.3V	11.7V	5uA	1.0V	80%	RI=95KΩ		SOP-8 SOT-26
									15KHz	70KHz
UB3846B	Power-Saving Mode PWM  Controller	Flyback Converters, Hopping Technology & Frequency Burst→PFM→PWM, and build in OVP,OLP,UVLO,OCP, SCP, LEB, and OTP sense by RT pin.	25.0V	16.3V	11.7V	5uA	1.0V	80%	RI=95KΩ		SOP-8
									15KHz	70KHz
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 Burst→PFM→PWM, and build in OVP,OLP,UVLO,OCP, SCP, LEB, OTP, Soft Start Etc.	30.0V	14.2V	8.2V	22uA	0.86V	80%	VFB=4.0V		DIP-8 SOP-8
									20KHz	68KHz
UC3849	Power-Saving Mode PWM Controllers	Flyback Converters, Hopping Technology & Frequency Burst→PFM→PWM, and build in OVP,OLP,UVLO,OCP, SCP, LEB, and OTP sense by RT pin, Frequency By RI Pin.	36.0V	16.5V	10.5V	4uA	0.86V	85%	RI=100KΩ		DIP-8 SOP-8
									22KHz	65KHz
UC3849B	LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS * UTC proprietary frequency hopping technology for Improved EMI performance. * Power-saving mode for high light-load and standby efficiency * Soft Start * 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 * Fixed switch frequency 65kHz * Gate output voltage clamped at 15V * Low start-up current * Cycle-by-cycle Current Limiting * Under voltage lockout (UVLO) * Few external components required	Flyback Converters, Hopping Technology & Frequency Burst→PWM, and build in OVP,OLP,UVLO,OCP, SCP, LEB, OTP, Soft Start Etc.	36.0V	16.5V	8.0V	2uA	0.92V	90%	VFB=3.5V		DIP-8 SOP-8
									20KHz	65KHz
UC3852	PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Standby and Short Circuit Protection	Flyback Converters, Hopping Technology & Frequency Burst→PWM, HV Start and build in OLP,UVLO,OCP, SCP, LEB, .	16.0V	12.8V	7.8V	20uA*	0.92V	87%	Internal Fixed		DIP-8 SOP-8
									42/65/103 KHz
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 Burst→PFM→PWM, HV Start and build in OLP,UVLO,OCP, SCP, LEB.	30.0V	13.0V	6.5V	20uA	0.65V	75%	RI=100KΩ		SOT-26
									22KHz	62KHz
UC3856L	-	-	-	-	-	-	-	-	-		SOT-26
									-	-
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 Burst→PFM→PWM, and build in OVP,OLP,UVLO,OCP, SCP, LEB, OTP, Soft Start Etc.	30.0V	14.0V	7.5V	5uA	0.65V	75%	RI=100KΩ		DIP-8 SOP-8 SOT-26
									22KHz	65KHz
UC3863A	* UTC proprietary frequency hopping technology for Improved EMI performance. * Power-saving mode for high light-load and standby efficiency * Dynamic peak current limiting for constant output power * Built-in synchronized slope compensation * OLP with automatic recovery * OTP and OVP with automatic recovery * VDD clamp for higher security * Programmable PWM Frequency * Low start-up current * Cycle-by-cycle Current Limiting * Under voltage lockout (UVLO) * Few external components required	Flyback Converters, Hopping Technology & Frequency Burst→PFM→PWM, and build in OVP,OLP,UVLO,OCP, SCP, LEB, OTP, Soft Start Etc.	35.0V	18.0V	7.0V	2uA	0.65V	90%	RI=100KΩ		HSOP-8 SOP-8 SOT-26
									20KHz	65KHz
UC3863L	Low Cost Power-Saving Mode PWM Controller for Flyback Converters with latched shut down * OLP with automatic recovery * OTP and OVP with latch shut down * Programmable PWM Frequency * Low start-up current * Cycle-by-cycle Current Limiting * Few external components required	Flyback Converters, Hopping Technology & Frequency Burst→PFM→PWM, and build in OVP,OLP,UVLO,OCP, SCP, LEB, OTP, Soft Start Etc.	32.0V	20.0V	8.0V	2uA	0.92V	90%	RI=100KΩ		SOT-26
									20KHz	65KHz
UC3868	Power-Saving Mode PWM Controllers	Flyback Converters,  Frequency Burst→PFM→PWM, and build in OVP,OLP,UVLO,OCP, SCP, LEB, and OTP sense by RT pin, Frequency By RI Pin.	36.0V	16.5V	10.5V	4.0uA	0.86V	85%	RI=100KΩ		DIP-8 SOP-8
									22KHz	65KHz
UC3869	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 65KHZ switching frequency * UVLO,OCP,OLP,OTP,OVP	Flyback Converters, HV Start and build in OVP,OLP,UVLO,OCP, SCP, LEB, and OTP sense by RT pin	35.0V	19.0V	7.0V	2uA	0.92V	90%	VFB=3.0V		DIP-8 SOP-8
									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 * UVLO,OCP,OLP,OTP,OVP	Flyback Converters, HV Start and build in OVP,OLP,UVLO,OCP, SCP, LEB, and OTP sense by RT pin	30.0V	18.0V	7.0V	2uA	0.92V	90%	VFB=3.0V		DIP-8 SOP-8
									20KHz	65KHz
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 Burst→PFM→PWM, OTP sense by RT pin, Fixed Frequency and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start Etc.	30.0V	13.0V	8.5V	5uA	0.75V	75%	Internal Fixed		SOT-26
									22KHz	65KHz
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 with automatic recovery * OTP and OVP( automatic recovery) * Programming OTP for higher security * Cycle-by-cycle current limiting * Few external components required	Flyback Converters,OTP sense by RT pin, Fixed Frequency and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start Etc.	35.0V	18.0V	7.0V	2uA	0.92V	90%	VFB=3.5V		SOT-26
									20KHz	65KHz
UC3873L	Low Cost Power-Saving Mode PWM Controller for Flyback Converters with latch shut down * Dynamic peak current limiting for constant output power * Built-in synchronized slope compensation * OLP with automatic recovery * OTP and OVP( UC3873L with latch shut down) * Programming OTP for higher security * Cycle-by-cycle current limiting * Few external components required	Flyback Converters, OTP sense by RT pin, Fixed Frequency and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start Etc.	35.0V	18.0V	7.0V	2uA	0.92V	90%	VFB=3.5V		SOT-26
									20KHz	65KHz
UC3873B	Low Cost Power-Saving Mode PWM Controller for Flyback Converters * Built-in synchronized slope compensation * OLP,OVP and VDD clamp for higher security * -500/+500mA gate driver * Programming OTP for higher security * Cycle-by-cycle Current Limiting * Few external components required	Flyback Converters, Hopping Technology & Frequency Burst→PFM→PWM, 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%	Internal Fixed		SOT-26
									22KHz	65KHz
UC3873HL	Low Cost Power-Saving Mode PWM Controller for Flyback Converters with latch shut down * Built-in synchronized slope compensation * OLP with automatic recovery * OTP and OVP( UC3873HL with latch shut down) * Programming OTP for higher security * Fixed switch frequency 130kHz * Cycle-by-cycle current limiting * Few external components required	Flyback Converters, OTP sense by RT pin, Fixed Frequency and build in OVP,OLP,UVLO,OCP, SCP, LEB, Soft Start Etc.	35.0V	18.0V	7.0V	2uA	0.92V	90%	VFB=3.5V		SOT-26
									20KHz	130KHz
UC3874A	-	-	-	-	-	-	-	-	-		SOP-8
									-	-
UC3875	LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS * Dynamic peak current limiting for constant output power * 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, HV Start and build in OLP,UVLO,OVP,LEB, Frequency By RI Pin.	30.0V	20.0V	8.0V	250uA (Max)	0.92V	90%	RI=100KΩ		SOP-8
									20KHz	65KHz
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.	35.0V	18.0V	7.0V	750uA (Max)	0.92V	90%	RI=100KΩ		SOP-8
									20KHz	65KHz
UC3875B	-	-	-	-	-	-	-	-	-		SOP-8
									-	-
UC3875L	LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS with latch up * Built-in synchronized slope compensation * OLP with automatic recovery * OTP and OVP with latch up * VDD clamp for higher security * Programmable frequency * Cycle-by-cycle Current Limiting * Few external components required	Flyback Converters, HV Start and build in OLP,UVLO,OVP,LEB, Frequency By RI Pin.	32.0V	20.0V	8.0V	250uA (Max)	0.92V	90%	RI=100KΩ		SOP-8
									20KHz	65KHz
UC3876A	-	-	-	-	-	-	-	-	-		-
									-	-
UC3893*	LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS	Flyback Converters, and build in OVP,OLP,UVLO,OCP, SCP, LEB, and OTP sense by RT pin	30.0V	13.0V	8.0V	2.5uA	0.95V	85%	VFB=3.5V		SOP-8
									22KHz	65KHz
Black: Under  Development