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UC2854B-EP Fiches technique(PDF) 1 Page - Texas Instruments |
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UC2854B-EP Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 38 page UDG−03110 10 11 6 8 15 1 16 ENA VSENSE IAC VRMS VCC GND GTDRV 2.65 V / 2.15 V 3 V 7 VAO 13 SS X2 A B C (A) 16 V / 10 V (B) 10.5 V / 10 V 5 MOUT 4 ISENSE 3 CAO 14 CT OSC 12 RSET S Q R R 2 PKLMT 20 V IC POWER 7.5 V REF 9 REF RUN 7.1 V RUN VCC 14 µA I MOUT A B C Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UC2854B-EP SGLS318A – NOVEMBER 2005 – REVISED NOVEMBER 2015 UC2854B-EP Advanced High-Power Factor Preregulator 1 Features Comparator • UVLO Options (16 V/10 V or 10.5 V/10 V) 1 • Controlled Baseline • 300- μA Start-Up Supply Current – One Assembly/Test Site, One Fabrication Site • Extended Temperature Performance of −55°C to 2 Applications 125°C Industrial Lighting • Enhanced Diminishing Manufacturing Sources (DMS) Support 3 Description • Enhanced Product-Change Notification The UC2854B products are pin compatible enhanced • Qualification Pedigree versions of the UC2854. Like the UC2854, these products provide all of the functions necessary for (1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an active power factor corrected preregulators. The extended temperature range. This includes, but is not limited controller achieves near unity power factor by to, Highly Accelerated Stress Test (HAST) or biased 85/85, shaping the ac-input line current waveform to temperature cycle, autoclave or unbiased HAST, correspond to the ac-input line voltage. To do this the electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as UC2854B uses average current mode control. justifying use of this component beyond specified Average current mode control maintains stable, low performance and environmental limits. distortion sinusoidal line current without the need for • Controls Boost PWM to Near-Unity Power Factor slope compensation, unlike peak current mode control. • Limits Line Current Distortion to <3% • World-Wide Operation Without Switches A 1% 7.5-V reference, fixed frequency oscillator, PWM, voltage amplifier with soft-start, line voltage • Accurate Power Limiting feedforward (VRMS squarer), input supply voltage • Fixed-Frequency Average Current-Mode Control clamp, and over current comparator round out the list • High Bandwidth (5 MHz), Low-Offset Current of features. Amplifier The UC2854B is available in a DW (SOIC-wide) • Integrated Current- and Voltage Amplifier Output package. Clamps Device Information(1) • Multiplier Improvements: Linearity, 500 mV VAC Offset (Eliminates External Resistor), 0 V to 5 V PART NUMBER PACKAGE BODY SIZE (NOM) Multout Common-Mode Range UC2854B-EP SOIC (16) 10.30 mm × 7.50 mm • VREF GOOD Comparator (1) For all available packages, see the orderable addendum at the end of the data sheet. • Faster and Improved Accuracy ENABLE Block Diagram 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
Numéro de pièce similaire - UC2854B-EP_15 |
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Description similaire - UC2854B-EP_15 |
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