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Utsource certified used parts
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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
HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
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● TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL
● OSCILLATOR FREQUENCYGUARANTEED AT 250kHz
● CURRENT MODE OPERATION TO 500kHz
● AUTOMATIC FEED FORWARD COMPENSATION
● LATCHINGPWM FOR CYCLE-BY-CYCLE CURRENT LIMITING
● INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT
● HIGH CURRENT TOTEM POLE OUTPUT
● UNDERVOLTAGE LOCKOUT WITH HYSTERESIS
● LOW START-UP AND OPERATINGCURRENT
DESCRIPTION
The UC384xB family of control lCs 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 a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than0.5mA, 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 UC3842B and UC3844B have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC3843B and UC3845B are 8.5V and 7.9V. The UC3842B and UC3843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC3844Band UC3845Bby the addition of an internal toggle flip flop which blanks the output off every other clock cycle.
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10000 buyer reviews from United States
Patricia Miller
Length of registration:7 years
I recently ordered an IC SFH6343 from your company and I am very pleased with its performance. The IC is reliable and efficient, and it has been working great in my project. It is easy to use and the instructions were clear and concise. I am very satisfied with the quality of the product and the customer service I received. Thank you for providing me with a great product and excellent customer ser
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03/17/2023
Harry Bauder
Length of registration:3 years
The packaging is exquisite, the high-end atmosphere is high-end, it can be seen that the merchants are very attentive. The baby is really good, it is the same as the picture, there is no difference, it is really good value for money, good quality and low price
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01/09/2023
Stephen Ballentine
Length of registration:3 years
I enjoyed learning how to use these. Fixed another broken project with it. Excellent quality, and it arrived in a protective tube designed to prevent damage.
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01/09/2023
Joe Ritch
Length of registration:3 years
The order is accepted, decorated and shipped quickly. Packing is good. Tracking works. Satisfied
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01/09/2023
Gordon C Whitten
Length of registration:3 years
The goods are received on time, until I checked, as I will check the feedback. The seller sent on time, everything came safe and sound.
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01/04/2023
Glenn Hann
Length of registration:3 years
rec'd chips; great packing for international shipping; thx for making small quantities available of these hard to find items!
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12/22/2022
Lammi
Length of registration:3 years
Fantastic customer support, my order arrived very fast and well packed. All around a fantastic experience and nice to have a place to buy lower quanties of hard to find chips.
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12/22/2022
Shawn Long
Length of registration:3 years
I enjoyed learning how to use these. Fixed another broken project with it. Excellent quality, and it arrived in a protective tube designed to prevent damage.
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12/19/2022
arturo solano
Length of registration:3 years
I received the parts swift and well packed. Thanks for the great service.
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12/19/2022
John Hernandez
Length of registration:3 years
I enjoyed learning how to use these. Fixed another broken project with it. Excellent quality, and it arrived in a protective tube designed to prevent damage.
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12/19/2022
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UC3845BN
UC3845BN has several brands around the world that may have alternate names for UC3845BN due to regional differences or acquisition. UC3845BN may also be known as the following names:
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