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Utsource certified used parts
Utsource certified used parts provide the following guarantees:
1. Utsource will inspect the goods, including appearance inspection (no serious damage to the appearance), select qualified and honest suppliers, and ensure 98% qualification rate.
2. Some parts are tested by machine.
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Description
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FEATURES
● Optimized For Off-line And DC To DC Converters
● Low Start Up Current (<1mA)
● Automatic Feed Forward Compensation
● Pulse-by-pulse Current Limiting
● Enhanced Load Response Characteristics
● Under-voltage Lockout With Hysteresis
● Double Pulse Suppression
● High Current Totem Pole Output
● Internally Trimmed Bandgap Reference
● 500khz Operation
● Low ROError Amp
DESCRIPTION
The UC1842/3/4/5 family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N Channel MOSFETs, is low in the off state.
Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC1842 and UC1844 have UVLO thresholds of 16V (on) and 10V (off), ideally suited to off-line applications. The corresponding thresholds for the UC1843 and UC1845 are 8.4V and 7.6V. The UC1842 and UC1843 can operate to duty cycles approaching 100%. A range of zero to 50% is obtained by the UC1844 and UC1845 by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.
Preview of the first 3 pages of the data sheet
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6 buyer reviews from Philippines
gloria sarria chavez
Length of registration:5 years
Very satisfied with
1
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06/12/2021
Sarah Jackson
Length of registration:7 years
I recently ordered an IC UC3844N from your company and I am very pleased with the product. The IC worked perfectly and I was able to use it in my application without any issues. The quality of the product was excellent and the delivery was very timely. I would definitely recommend your company to others and I look forward to doing business with you again in the future. Thank you for your excellent
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03/17/2023
HN15871 Raul Rodriguez / Aereo
Length of registration:4 years
satisfaction
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0
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07/21/2020
Silvestre Triana Hernandez
Length of registration:6 years
satisfaction
0
0
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11/05/2019
Hermann Ott
Length of registration:10 years
Perfekt
0
0
Reply0
08/28/2016
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Warranty
All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
UC3844
UC3844 has several brands around the world that may have alternate names for UC3844 due to regional differences or acquisition. UC3844 may also be known as the following names:
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Stock Status: 10000
Minimum: 2
Total Price:
Unit Price:80.02688
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Stop production experts, we can provide a large number of electronic components that have been stopped production and are difficult to find, to facilitate the maintenance company
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