UC3841DW

Obsolete

Texas Instruments

CURRENT MODE PWM CONTROLLER 1A 500KHZ 18-PIN SOIC TUBE

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UC3841DW

Obsolete

Texas Instruments

CURRENT MODE PWM CONTROLLER 1A 500KHZ 18-PIN SOIC TUBE

Deep-Dive with AI

DocumentsDatasheet

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UC3841DW

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
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package / Case	18-SOIC
Package / Case [y]	0.295 in
Package / Case [y]	7.5 mm
Supplier Device Package	18-SOIC
Synchronous Rectifier	False
Topology	Flyback, Boost, Forward Converter
Voltage - Supply (Vcc/Vdd) [Max]	32 V
Voltage - Supply (Vcc/Vdd) [Min]	8 V

UC3841 Series

32V, 1A , 0.5MHz off-line PWM controller , 0C to 70C

Part	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Supplier Device Package	Output Configuration	Function	Mounting Type	Duty Cycle (Max)	Output Type	Control Features	Operating Temperature [Max]	Number of Outputs	Frequency - Switching	Topology	Output Phases	Package / Case	Package / Case [x]	Package / Case [x]	Package / Case [y]	Package / Case [y]
Texas Instruments UC3841N	32 V	8 V	18-PDIP	Isolation Capable Positive	Step-Up Step-Up/Step-Down	Through Hole	95 %	Transistor Driver	Current Limit Enable Frequency Control Ramp Reset Soft Start	70 °C	1	500 kHz	Boost Flyback Forward Converter	1	18-DIP	0.3 in	7.62 mm
Texas Instruments UC3841DW	32 V	8 V	18-SOIC	Isolation Capable Positive	Step-Up Step-Up/Step-Down	Surface Mount	95 %	Transistor Driver	Current Limit Enable Frequency Control Ramp Reset Soft Start	70 °C	1	500 kHz	Boost Flyback Forward Converter	1	18-SOIC			0.295 in	7.5 mm
Texas Instruments UC3841DWTR	32 V	8 V	18-SOIC	Isolation Capable Positive	Step-Up Step-Up/Step-Down	Surface Mount	95 %	Transistor Driver	Current Limit Enable Frequency Control Ramp Reset Soft Start	70 °C	1	500 kHz	Boost Flyback Forward Converter	1	18-SOIC			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	$

Description

General part information

UC3841 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