DatasheetsPDF.com

UC1842A

LINFINITY
Part Number UC1842A
Manufacturer LINFINITY
Description CURRENT MODE PWM CONTROLLER
Published Oct 16, 2019
Detailed Description T H E I N F I N I T E P O W E R O F I N N O VAT I O N L I N D O C #: 1840 UC184xA/284xA/384xA CURRENT MODE PWM CONTROLL...
Datasheet PDF File UC1842A PDF File

UC1842A
UC1842A

Overview
T H E I N F I N I T E P O W E R O F I N N O VAT I O N L I N D O C #: 1840 UC184xA/284xA/384xA CURRENT MODE PWM CONTROLLER PR O D U C T I O N D ATA S H E E T DESCRIPTION The UC184xA family of control ICs provides all the necessary features to implement off-line fixed-frequency, current-mode switching power supplies with a minimum of external components.
The current mode architecture demonstrates improved load regulation, pulse-by-pulse current limiting and inherent protection of the power supply output switch.
The IC includes: A bandgap reference trimmed to ±1% accuracy, an error amplifier, a current sense comparator with internal clamp to 1V, a high current totem pole output stage for fast switching of power MOSFET's, and an externally programmable oscillator to set frequency and maximum duty cycle.
The undervoltage lock-out is designed to operate with 250µA typ.
start-up current, allowing an efficient bootstrap supply voltage design.
Available options for this family of products, such as start-up voltage hysteresis and duty cycle, are summarized below in the Available Options section.
The UC184xA family of control ICs is also available in 14-pin SOIC package which makes the Power Output Stage Collector and Ground pins available.
PRODUCT HIGHLIGHT COMPARISON OF UC384XA VS.
SG384 X DISCHARGE CURRENT SG384x Min.
Limit UC384xA TA=25°C SG384x Max.
Limit KEY FEATURES s LOW START-UP CURRENT.
(0.
5mA max.
) s TRIMMED OSCILLATOR DISCHARGE CURRENT.
(See Product Highlight) p OPTIMIZED FOR OFF-LINE AND DC-TO-DC CONVERTERS.
p AUTOMATIC FEED FORWARD COMPENSATION.
p PULSE-BY-PULSE CURRENT LIMITING.
p ENHANCED LOAD RESPONSE CHARACTERISTICS.
p UNDER-VOLTAGE LOCKOUT WITH HYSTERESIS.
p DOUBLE PULSE SUPPRESSION.
p HIGH-CURRENT TOTEM POLE OUTPUT.
p INTERNALLY TRIMMED BANDGAP REFERENCE.
p 500KHz OPERATION.
p LOW RO ERROR AMPLIFIER.
A P P L I C AT I O N S s ECONOMICAL OFF-LINE FLYBACK OR FORWARD CONVERTERS.
s DC-DC BUCK OR BOOST CONVERTERS.
s LOW COST DC MOTOR CONTROL.
7.
5 7.
8 −3...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)