UC1854A, UC1854AJ, UC1854AJ/883B Selling Leads, Datasheet
MFG:Uniden Package Cooled:QFP48 D/C:O9+
UC1854A, UC1854AJ, UC1854AJ/883B Datasheet download
Part Number: UC1854A
MFG: Uniden
Package Cooled: QFP48
D/C: O9+
UC1854A, UC1854AJ, UC1854AJ/883B
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Info of UC1854A
Info of UC1854AJ
Info of UC1854AJ/883B
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About UC1854A
PDF/DataSheet Download
Datasheet: UC1854A
File Size: 193172 KB
Manufacturer:
Download : Click here to Download
About UC1-1
PDF/DataSheet Download
Datasheet: UC1-1
File Size: 189406 KB
Manufacturer: TI [Texas Instruments]
Download : Click here to Download
About UC1-1
PDF/DataSheet Download
Datasheet: UC1-1
File Size: 189406 KB
Manufacturer: TI [Texas Instruments]
Download : Click here to Download
UC1854A General Description
The UC3854A/B products are pin compatible enhanced versions of the UC3854. Like the UC3854, these products provide all of the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the AC input line current waveform to correspond to the AC input line voltage. To do this the UC3854A/B uses average current mode control. Average current mode control maintains stable, low disto -rtion sinusoidal line current without the need for slope compensation, unlike peak current mode control.
A 1% 7.5 V reference, fixed frequency oscillator, PWM, voltage amplifier with soft-start, line voltage feedforward (VRMS squarer), input supply voltage clamp, and over current comparator round out the list of features.
Available in the 16-pin N (PDIP), DW (SOICWide), and J (CDIP) and 20-pin Q (PLCC) package. See ordering infor -mation on page 3 for availability by temperature range.
UC1854A Features
*Controls Boost PWM to Near-Unity Power
Factor
* Limits Line Current Distortion To < 3%
*World-Wide Operation Without Switches
*Accurate Power Limiting
*Fixed-Frequency Average Current-Mode
Control
*High Bandwidth (5 MHz), Low-Offset Current
Amplifier
*Integrated Current- and Voltage Amplifier
Output Clamps
*Multiplier Improvements: Linearity, 500 mV
V ACOffset (Eliminates External Resistor), 0 V
to 5 V Multout Common-Mode Range
*V REF GOOD Comparator REF
*Faster and Improved Accuracy ENABLE
Comparator
*UVLO Options (16 V/10 V or 10.5 V/10 V)
*300-A Start-Up Supply Current
UC1854A Connection Diagram
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