Datasheet LT8311 (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | Synchronous Rectifier Controller with Opto-Coupler Driver for Forward Converters |
| Seiten / Seite | 48 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| Dateiformat / Größe | PDF / 744 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Delay from CG Turn-Off to CSW
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LT8311
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Delay from CG Turn-Off to CSW Jitter in CG Turn-Off Delay to CSW Rising Edge vs CSW Switching Rising Edge vs CSW Switching Delay from CG Turn-Off to Frequency and Junction Temp Frequency and Junction Temp FG Turn-On
200 30 70 PMODE = 0V PMODE = 0V PMODE = 0V 175 INTVCC = 8V INTVCC = 8V INTVCC = 8V 25 100kHz 150 60 100kHz 20 125 150kHz 100 150kHz 15 50 TER (ns) 75 JIT 300kHz ALLING TO CSW RISING (ns) 10 ALLING TO FG RISING (ns) 50 300kHz 40 Y CG F Y CG F 5 25 DELA DELA 0 0 30 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8311 G01 8311 G02 8311 G03
Preactive Scheme Waveforms Preactive Scheme Waveforms Preactive Scheme Waveforms (Active Clamp Reset, CCM) (Active Clamp Reset, Light DCM) (Active Clamp Reset, Deep DCM)
IL 5A/DIV IL IL 5A/DIV 5A/DIV CSW 5A/DIV CSW CSW 5A/DIV 5A/DIV CG CG 10V/DIV CG 10V/DIV 10V/DIV FG FG 10V/DIV FG 10V/DIV 10V/DIV 8311 G04 2µs/DIV 8311 G05 2µs/DIV 8311 G06 2µs/DIV
Maximum CSW Duty Cycle Derating Curve vs CSW Switching Frequency Feedback Reference Voltage and Junction Temperature Feedback Reference Voltage vs VIN
90 PMODE = 0V 85 1.2360 1.2360 100kHz, 200kHz 80 1.2325 1.2325 Y CYCLE (%) 75 300kHz 1.2290 1.2290 70 400kHz TAGE (V) TAGE (V) 1.2255 1.2255 65 FB VOL FB VOL 1.2220 1.2220 60 MAXIMUM CSW DUT 55 1.2185 1.2185 50 1.2150 1.2150 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 3 6 9 12 15 18 21 24 27 30 TEMPERATURE (°C) TEMPERATURE (°C) VIN (V) 8311 G07 8311 G08 8311 G09 8311f For more information www.linear.com/LT8311 7 Document Outline Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation FUNDAMENTALS OF FORWARD CONVERTER OPERATION IN CCM LT8311 SYNCHRONOUS CONTROL SCHEMES PREACTIVE MODE SYNCHRONOUS CONTROL SYNC MODE SYNCHRONOUS CONTROL OPTO-COUPLER CONTROL Applications Information VIN BIAS SUPPLY INTVCC BIAS SUPPLY LT8311 OPTO CONTROL FUNDAMENTALS LT8311 SYNCHRONOUS CONTROL FUNDAMENTALS PREACTIVE MODE SYNCHRONOUS CONTROL SYNC MODE SYNCHRONOUS CONTROL Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Delay from CG Turn-Off to CSW Jitter in CG Turn-Off Delay to CSW Rising Edge vs CSW Switching Rising Edge vs CSW Switching Delay from CG Turn-Off to Frequency and Junction Temp Frequency and Junction Temp FG Turn-On
200 30 70 PMODE = 0V PMODE = 0V PMODE = 0V 175 INTVCC = 8V INTVCC = 8V INTVCC = 8V 25 100kHz 150 60 100kHz 20 125 150kHz 100 150kHz 15 50 TER (ns) 75 JIT 300kHz ALLING TO CSW RISING (ns) 10 ALLING TO FG RISING (ns) 50 300kHz 40 Y CG F Y CG F 5 25 DELA DELA 0 0 30 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8311 G01 8311 G02 8311 G03
Preactive Scheme Waveforms Preactive Scheme Waveforms Preactive Scheme Waveforms (Active Clamp Reset, CCM) (Active Clamp Reset, Light DCM) (Active Clamp Reset, Deep DCM)
IL 5A/DIV IL IL 5A/DIV 5A/DIV CSW 5A/DIV CSW CSW 5A/DIV 5A/DIV CG CG 10V/DIV CG 10V/DIV 10V/DIV FG FG 10V/DIV FG 10V/DIV 10V/DIV 8311 G04 2µs/DIV 8311 G05 2µs/DIV 8311 G06 2µs/DIV
Maximum CSW Duty Cycle Derating Curve vs CSW Switching Frequency Feedback Reference Voltage and Junction Temperature Feedback Reference Voltage vs VIN
90 PMODE = 0V 85 1.2360 1.2360 100kHz, 200kHz 80 1.2325 1.2325 Y CYCLE (%) 75 300kHz 1.2290 1.2290 70 400kHz TAGE (V) TAGE (V) 1.2255 1.2255 65 FB VOL FB VOL 1.2220 1.2220 60 MAXIMUM CSW DUT 55 1.2185 1.2185 50 1.2150 1.2150 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 3 6 9 12 15 18 21 24 27 30 TEMPERATURE (°C) TEMPERATURE (°C) VIN (V) 8311 G07 8311 G08 8311 G09 8311f For more information www.linear.com/LT8311 7 Document Outline Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation FUNDAMENTALS OF FORWARD CONVERTER OPERATION IN CCM LT8311 SYNCHRONOUS CONTROL SCHEMES PREACTIVE MODE SYNCHRONOUS CONTROL SYNC MODE SYNCHRONOUS CONTROL OPTO-COUPLER CONTROL Applications Information VIN BIAS SUPPLY INTVCC BIAS SUPPLY LT8311 OPTO CONTROL FUNDAMENTALS LT8311 SYNCHRONOUS CONTROL FUNDAMENTALS PREACTIVE MODE SYNCHRONOUS CONTROL SYNC MODE SYNCHRONOUS CONTROL Typical Applications Package Description Typical Application Related Parts