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Description
SMPS Controller
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The UC3844, UC3845 series are high performance fixed frequency current mode controllers.They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost effective solution with minimal external components.These integrated circuits feature an oscillator, a temperature compensated reference,high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
Also included are protective features consisting of input and reference under voltage lockouts each with hysteresis, cycle-by-cycle current limiting, a latch for single pulse metering, and a flip-flop which blanks the output off every other oscillator cycle, allowing output dead times to be programmed for50% to 70%.
These devices are available in an 8-pin dual-in-line plastic package as well as the 14-pin plastic surface mount (SO-14).The SO-14 package has separate power and ground pins for the totem pole output stage.
The UCX844 has UVLO thresholds of 16 V (on) and 10 V(off), ideally suited for off-line converters.The UCX845 is tailored for lower voltage applications having UVLO thresholds of 8.5 V(on) and 7.6 V (off).
● Current Mode Operation to 500 kHz Output Switching Frequency
● Output Dead time Adjustable from 50% to 70%
● Automatic Feed Forward Compensation
● Latching PWM for Cycle-By-Cycle Current Limiting
● Internally Trimmed Reference with Under voltage Lockout
● High Current Totem Pole Output
● Input Under voltage Lockout with Hysteresis
● Low Start up and Operating Current
● Direct Interface with Motorola SENSEFET Products
Preview of the first 3 pages of the data sheet
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241 buyer reviews from United Kingdom
Amber Jones
Length of registration:7 years
The testing result for the Intergrated Circuits UC3844D ordered from Utsource website was satisfactory. The device was tested for its functionality, power consumption, and other parameters. The results showed that the device was able to operate within the specified parameters and that it had a low power consumption. The device was also tested for its compatibility with other components and the res
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03/17/2023
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UC3844D
UC3844D has several brands around the world that may have alternate names for UC3844D due to regional differences or acquisition. UC3844D may also be known as the following names:
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Stock Status: 10000
Minimum: 2
Total Price:
Unit Price:1.06395
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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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