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UCC28070A Datasheet(PDF) 1 Page - Texas Instruments |
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UCC28070A Datasheet(HTML) 1 Page - Texas Instruments |
1 / 43 page V IN V OUT 12V to 21V M2 R B R A R B M1 L2 D2 D1 C OUT R A C PC C PC C ZC C ZC R ZC R ZC C SS R RDM R RT T1 T2 C CDR R DMX R SYN C REF R PK1 R PK2 C ZV R ZV C PV R S R S 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 CAOA CAOB PKLMT GND VAO VINAC VSENSE CSA CSB RT CDR SS GDB GDA IMO VCC RSYNTH VREF DMAX RDM R IMO To CSB To CSA From Ixfrms L1 UCC28070A www.ti.com SLUSAW0 – MARCH 2012 Extended Frequency Range (10 kHz to 300 kHz), Interleaving Continuous Conduction Mode PFC Controller Check for Samples: UCC28070A 1 FEATURES APPLICATIONS • Interleaved Average Current-Mode PWM • Air Conditioners and White Goods Control with Inherent Current Matching • PFC Applications with IGBT Power Switches • Advanced Current Synthesizer Current • High-Efficiency Server and Desktop Power Sensing for Superior Efficiency Supplies • Highly-Linear Multiplier Output with Internal • Telecom Rectifiers Quantized Voltage Feed-Forward Correction • Industrial Equipment for Near-Unity PF • Extended Range Programmable Frequency (10 DESCRIPTION kHz to 300 kHz) The UCC28070A is an extended frequency range • Programmable Maximum Duty-Cycle Clamp derivative of UCC28070, capable of operating at low switching frequencies desired for IGBT power switch • Programmable Frequency Dithering Rate and based PFC converters in high power applications. Magnitude for Enhanced EMI Reduction The UCC28070A is capable of operating in frequency – Magnitude: 3 kHz to 30 kHz range 10 kHz to 300 khz, thus extending the range of – Rate: Up to 30 kHz operation compared to UCC28070 whose minimum • External Clock Synchronization Capability operating frequency was limited to 30 khz. All the other features and benefits of UCC28070 are also • Enhanced Load and Line Transient Response available in UCC28070A. The 180 degree out-of- through Voltage Amplifier Output Slew-Rate phase interleaved operation generates substantial Correction reduction in input and output ripple currents and • Programmable Peak Current Limiting conducted EMI filtering becomes easier and less • Bias-Supply UVLO, Over-Voltage Protection, expensive. Open-Loop Detection, and PFC-Enable Monitoring • External PFC-Disable Interface • Open-Circuit Protection on VSENSE and VINAC pins • Programmable Soft Start • 20-Lead TSSOP Package Simplified Application Diagram 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2012, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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