UC2841N

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Texas Instruments

32-V, 1-A , 0.5MHZ OFF-LINE PWM CONTROLLER , -20C TO 85C

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DocumentsProgrammable, Off-Line, PWM Controller datasheet

UC2841N

Active

Texas Instruments

32-V, 1-A , 0.5MHZ OFF-LINE PWM CONTROLLER , -20C TO 85C

Deep-Dive with AI

DocumentsProgrammable, Off-Line, PWM Controller datasheet

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UC2841N

Clock Sync	False
Control Features	Ramp, Soft Start, Enable, Frequency Control, Current Limit, Reset
Duty Cycle (Max)	95 %
Frequency - Switching	500 kHz
Function	Step-Up, Step-Up/Step-Down, Step-Down
Mounting Type	Through Hole
Number of Outputs	1
Operating Temperature [Max]	85 C
Operating Temperature [Min]	-25 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package / Case	18-DIP
Package / Case [x]	0.3 in
Package / Case [x]	7.62 mm
Supplier Device Package	18-PDIP
Synchronous Rectifier	False
Topology	Boost, Forward Converter, Flyback, Buck
Voltage - Supply (Vcc/Vdd) [Max]	32 V
Voltage - Supply (Vcc/Vdd) [Min]	8 V

UC2841 Series

32-V, 1-A , 0.5MHz off-line PWM controller , -20C to 85C

Part	Topology	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Output Phases	Clock Sync	Frequency - Switching	Output Configuration	Package / Case	Package / Case [x]	Package / Case [x]	Number of Outputs	Control Features	Supplier Device Package	Synchronous Rectifier	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Function	Duty Cycle (Max)	Output Type	Package / Case [y]	Package / Case [y]
Texas Instruments UC2841N	Boost Buck Flyback Forward Converter	85 C	-25 °C	Through Hole	1		500 kHz	Isolation Capable Positive	18-DIP	0.3 in	7.62 mm	1	Current Limit Enable Frequency Control Ramp Reset Soft Start	18-PDIP		32 V	8 V	Step-Down Step-Up Step-Up/Step-Down	95 %	Transistor Driver
Texas Instruments UC2841DW	Boost Buck Flyback Forward Converter	85 C	-25 °C	Surface Mount	1		500 kHz	Isolation Capable Positive	18-SOIC			1	Current Limit Enable Frequency Control Ramp Reset Soft Start	18-SOIC		32 V	8 V	Step-Down Step-Up Step-Up/Step-Down	95 %	Transistor Driver	0.295 in	7.5 mm

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 19.59
		20	$ 18.01
		40	$ 17.26
		100	$ 15.21
		260	$ 14.46
		500	$ 13.53
Texas Instruments	TUBE	1	$ 17.70
		100	$ 15.46
		250	$ 11.92
		1000	$ 10.66

Description

General part information

UC2841 Series

The UC1841 family of PWM controllers has been designed to increase the level of versatility while retaining all of the performance features of the earlier UC1840 devices. While still optimized for highly-efficient boot-strapped primary-side operation in forward or flyback power converters, the UC1841 is equally adept in implementing both low and high voltage input DC to DC converters. Important performance features include a low-current starting circuit, linear feed-forward for constant volt-second operation, and compatibility with either voltage or current mode topologies.

In addition to start-up and normal regulating PWM functions, these devices include built in protection from over-voltage, under-voltage, and over-current fault conditions with the option for either latch-off or automatic restart.

While pin compatible with the UC1840 in all respects except that the polarity of the External Stop has been reversed, the UC1841 offers the following improvements:

Documents

Technical documentation and resources

Programmable, Off-Line, PWM Controller datasheet

Data sheet