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Description
High Performance Current Mode PWM ControllerPWM
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● TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL
● OSCILLATOR FREQUENCY GUARANTEED AT250kHz
● CURRENT MODE OPERATION TO500kHz
● 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 OPERATING CURRENT
DESCRIPTION
The UC384xBfamily 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 a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, 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 UC3843Band UC3845Bare 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 UC3844B and UC3845B 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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10000 buyer reviews from United States
Kimberly Williams
Length of registration:7 years
The UC3842BN integrated circuit is a high-performance device that offers superior performance in a wide range of applications. It features a wide operating temperature range, low power consumption, and high switching frequency. Additionally, it offers excellent protection against over-voltage, over-current, and over-temperature conditions. With its robust design and reliable performance, the UC384
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03/17/2023
HN15871 Raul Rodriguez / Aereo
Length of registration:4 years
satisfaction
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07/21/2020
Costachescu Vasile
Length of registration:1 years
All right. Excellent transaction. Thank you
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04/07/2018
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UC3842B
UC3842B has several brands around the world that may have alternate names for UC3842B due to regional differences or acquisition. UC3842B may also be known as the following names:
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Unit Price:0.85980
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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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