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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC7813 датащи(PDF) 1 Page - Linear Technology |
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LTC7813 датащи(HTML) 1 Page - Linear Technology |
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1 / 36 page  LTC7821 1 Rev A For more information www.analog.com TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION Hybrid Step-Down Synchronous Controller Efficiency at Various VIN for VOUT = 12V All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, Including 9484799. n Wide VIN Range: 10V to 72V (80V ABS Max) n Soft Switching for Low Noise Operation n Phase-Lockable Fixed Frequency 200kHz to 1.5MHz n ±1% Output Voltage Accuracy n RSENSE or DCR Current Sensing n Programmable CCM, DCM, or Burst Mode® Operation n CLKOUT Pin for Multiphase Operation n Short Circuit Protected n EXTVCC Input for Improved Efficiency n Monotonic Output Voltage Start-Up n Optional External Reference n 32-Pin (5mm × 5mm) QFN n Intermediate Bus Converters n High Current Distributed Power Systems n Telecom, Datacom, and Storage Systems n Automotive Applications The LTC®7821 uses a proprietary architecture that merges a soft switching charge pump topology with a synchro- nous step-down converter to provide superior efficiency and EMI performance compared to traditional switching architectures. In a typical 48V to 12V application, efficiency of greater than 97% is attainable with the LTC7821 switching at 500kHz. The same efficiency can only be achieved with a traditional controller switching at one-third the frequency. Higher switching frequencies allow the use of smaller in- ductances that yield faster transient response and smaller solution size. The LTC7821 can be easily paralleled to provide higher outputcurrentswithitsaccuratecurrentsharingcapability and frequency synchronization function. 2µH CFLY 10µF ×8 CB1, 0.22µF CB2 0.47µF CB3 1µF 4.7µF CIN 100µF M1 M2 M3 M4 100 1µF 10k 10k COUT 150µF ×2 1k 0.1µF 10µF ×2 6.81k 0.22µF VIN_SENSE VIN PINS NOT SHOWN IN THIS CIRCUIT: CLKOUT TEMP RUN HYS_PRGM MODE/PLLIN TRACK/SS M1: BSZ070N08LSS M2, M3: BSC032N04LS M4: BSC014N04LSI TIMER FREQ EXT_REF FAULT PGOOD ITH EXTVCC VFB ISNS+ ISNS– PGND INTVCC BG2 SW3 BOOST3 TG2 MID_SENSE MID BOOST2 BG1 SW1 BOOST1 LTC7821 7821 TA01a TG1 VIN 36V TO 72V INTVCC VOUT 12V 20A D1 D2 D3 INTVCC 8V PGOOD FAULT 60.4k 4.32k + CMID 10µF ×8 + 2.2µF ×6 fSW = 500KHz VOUT = 12V CCM IOUT = 20A IOUT = 10A INPUT VOLTAGE (V) 30 40 50 60 70 80 93 94 95 96 97 98 99 100 7821 TA01b Document Feedback |
Аналогичный номер детали - LTC7813 |
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Аналогичное описание - LTC7813 |
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