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Description
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Introduction:
The UC3845 family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with minimal external parts count. Inter Dalrymple- mentioned circuits include under-voltage lockout feature- ing start-up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM compare- to which also provides current-limit control, and totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFET Transistor, is low in the off-state.
Some Core Parameters:
SPECIAL FEATURES :
● Optimized for off-line and Direct current (DC) to Direct current (DC) converters
● Low start-up current (< 1 ma)
● Automatic feed forward compensa- tion
● 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 refer-ence
● 500kHz operation
● Low ro error amp
How it Uses in the work:
Internal Block Diagram:
UC3845 Pinout Connections:
Absolute maximum ratings:
● VI Supply Voltage (low impedance source): 30V
● IO Current Output: ± 1A
● EO Output Energy (capacitive load): 5μJ
● Ptot Power Dissipation at Tamb ≤ 50℃ (mini dip, DIP-14): 1W
● Ptot Power Dissipation at Tamb ≤ 25℃ (SO14): 725mW
● Pstg Storage Temperature Range: -65 to 150℃
● TL Lead Temperature (soldering 10s): 300℃
Preview of the first 3 pages of the data sheet
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222 buyer reviews from India
Sarah Jackson
Length of registration:7 years
I recently purchased the IC UC3845N from your company and I am very pleased with the product. It has been working perfectly in my circuit and has been providing reliable performance. The features of the IC are exactly what I was looking for and it has been a great addition to my project. I appreciate the quality of the product and the customer service I received from your company. Thank you for yo
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03/17/2023
HN15871 Raul Rodriguez / Aereo
Length of registration:4 years
satisfaction
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07/21/2020
franck HORDE
Length of registration:12 years
article conforme a l' annonce , ok.
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01/04/2020
luis portocarrero troncos
Length of registration:5 years
llego ok
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0
Reply0
07/10/2018
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UC3845
UC3845 has several brands around the world that may have alternate names for UC3845 due to regional differences or acquisition. UC3845 may also be known as the following names:
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Total Price:
Unit Price:0.77700
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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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