UC3841N - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

UC3841N
Manufacturer

TI
ChipWorker Part#

CW49652957
Category

PWM Controller IC
Package

DIP-18
Description

TEXAS INSTRUMENTS UC3841N Controller PWM Programmable, 30V-8V supply, 500kHz, 40V/400mA out, DIP-18
Documentation

Datasheet

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UC3841N Specifications

Attribute	Attribute Value

Part Number	UC3841N
Manufacturer	TI
ChipWorker Part#	CW49652957
Category	PWM Controller IC
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	18 Pin
Case/Package	DIP-18
Frequency	450 kHz
Supply Voltage (DC)	8.00V (min)
Number of Outputs	1 Output
Input Voltage (DC)	30.0 V
Output Voltage	40 V
Output Current	400 mA
Supply Current	14 mA
Input Current	10.0 mA
Power Dissipation	1 W
Number of Regulated Outputs	1 Output
Switching Frequency	500 kHz
Topology	Boost, Flyback, Forward
Duty Cycle	95 %
Maximum Duty Cycle	95 %
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Power Dissipation (Max)	1000 mW
Supply Voltage	8V ~ 32V
Supply Voltage (Max)	30 V
Supply Voltage (Min)	8 V
Input Voltage	30 V
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Size-Length	22.48 mm
Size-Width	6.35 mm
Size-Height	4.57 mm
Operating Temperature	0℃ ~ 70℃
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/06/15
ECCN Code	EAR99

Product Description

DESCRIPTION
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.
FEATURES
• All Control, Driving, Monitoring, and Protection Functions Included
• Low-current, Off-line Start Circuit
• Voltage Feed Forward or Current Mode Control
• Guaranteed Duty Cycle Clamp
• PWM Latch for Single Pulse per Period
• Pulse-by-Pulse Current Limiting Plus Shutdown for Over-Current Fault
• No Start-up or Shutdown Transients
• Slow Turn-on Both Initially and After Fault Shutdown
• Shutdown Upon Over- or Under-Voltage Sensing
• Latch Off or Continuous Retry After Fault
• PWM Output Switch Usable to 1A Peak Current
• 1% Reference Accuracy
• 500kHz Operation

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