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LM25115 データシート(PDF) 1 Page - Texas Instruments |
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LM25115 データシート(HTML) 1 Page - Texas Instruments |
1 / 23 page Main Output 3.3V VBIAS FB AGND COMP Sync VCC SS HB HO HS LO PGND VOUT CO CS RAMP Auxiliary Output 2.0V +12V RS FEEDBACK Main Converter PWM Controller INPUT Phase Signal LM25115 www.ti.com SNVS418A – NOVEMBER 2005 – REVISED APRIL 2013 LM25115 Secondary Side Post Regulator Controller Check for Samples: LM25115 1 FEATURES DESCRIPTION The LM25115 controller contains all of the features 2 • Self-synchronization to Main Channel Output necessary to implement multiple output power • Free-run Mode for Buck Regulation of DC converters utilizing the Secondary Side Post Input Regulation (SSPR) technique. The SSPR technique • Leading Edge Pulse Width Modulation develops a highly efficient and well regulated auxiliary output from the secondary side switching waveform of • Voltage-mode Control with Current Injection an isolated power converter. Regulation of the and Input Line Feed-forward auxiliary output voltage is achieved by leading edge • Operates from AC or DC Input up to 42V pulse width modulation (PWM) of the main channel • Wide 4.5V to 30V Bias Supply Range duty cycle. Leading edge modulation is compatible with either current mode or voltage mode control of • Wide 0.75V to 13.5V Output Range. the main output. The LM25115 drives external high • Top and Bottom Gate Drivers Sink 2.5A Peak side and low side NMOS power switches configured • Adaptive Gate Driver Dead-time Control as a synchronous buck regulator. A current sense amplifier provides overload protection and operates • Wide Bandwidth Error Amplifier (4MHz) over a wide common mode input range. Additional • Programmable Soft-start features include a low dropout (LDO) bias regulator, • Thermal Shutdown Protection error amplifier, precision reference, adaptive dead time control of the gate signals and thermal • TSSOP-16 or Thermally Enhanced WSON-16 shutdown. Packages Typical Application Circuit Figure 1. Simplified Multiple Output Power Converter Utilizing SSPR Technique 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. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2005–2013, 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. |
同様の部品番号 - LM25115_15 |
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同様の説明 - LM25115_15 |
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