Datasheet LT8311 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | Synchronous Rectifier Controller with Opto-Coupler Driver for Forward Converters |
| Pages / Page | 48 / 10 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 744 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Prop Delay from SYNC Input to
Model Line for this Datasheet
Text Version of Document
LT8311
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Prop Delay from SYNC Input to CSP Maximum Input Current SYNC High/Low Trip Voltage CG/FG Outputs
200 2.0 180 VCSP = 150V CG Rise/FG Fall, SYNC = ±2V 170 1.5 CG Rise/FG Fall, SYNC = ±6V SYNC HIGH 160 CG Rise/FG Fall, SYNC = ±10V 190 1.0 150 FG Rise/CG Fall, SYNC = ±2V FG Rise/CG Fall, SYNC = ±6V Y (ns) 140 0.5 FG Rise/CG Fall, SYNC = ±10V 130 TAGE (V) 180 0 120 TION DELA 110 –0.5 SYNC VOL AGA 100 170 –1.0 SYNC LOW PROP 90 80 –1.5 CSW/FSW MAXIMUM INPUT CURRENT (µA) 70 160 –2.0 60 –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 G27 8311 G28 8311 G29
CSP Trip Voltage vs Series CSP TIMER Frequency Resistor (RCSP)
600 80 R 500 TIMER = 41.2kΩ 60 400 40 R TAGE (mV) 300 TIMER = 71.5kΩ 20 FREQUENCY (kHz) 200 CSP TRIP VOL R 100 TIMER = 221kΩ 0 0 –20 –75 –50 –25 0 25 50 75 100 125 150 0.1 0.4 0.7 1.0 1.3 1.6 1.9 TEMPERATURE (°C) R 8311 G30 CSP (kΩ) 8311 G31 8311f 10 For more information www.linear.com/LT8311 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. Prop Delay from SYNC Input to CSP Maximum Input Current SYNC High/Low Trip Voltage CG/FG Outputs
200 2.0 180 VCSP = 150V CG Rise/FG Fall, SYNC = ±2V 170 1.5 CG Rise/FG Fall, SYNC = ±6V SYNC HIGH 160 CG Rise/FG Fall, SYNC = ±10V 190 1.0 150 FG Rise/CG Fall, SYNC = ±2V FG Rise/CG Fall, SYNC = ±6V Y (ns) 140 0.5 FG Rise/CG Fall, SYNC = ±10V 130 TAGE (V) 180 0 120 TION DELA 110 –0.5 SYNC VOL AGA 100 170 –1.0 SYNC LOW PROP 90 80 –1.5 CSW/FSW MAXIMUM INPUT CURRENT (µA) 70 160 –2.0 60 –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 G27 8311 G28 8311 G29
CSP Trip Voltage vs Series CSP TIMER Frequency Resistor (RCSP)
600 80 R 500 TIMER = 41.2kΩ 60 400 40 R TAGE (mV) 300 TIMER = 71.5kΩ 20 FREQUENCY (kHz) 200 CSP TRIP VOL R 100 TIMER = 221kΩ 0 0 –20 –75 –50 –25 0 25 50 75 100 125 150 0.1 0.4 0.7 1.0 1.3 1.6 1.9 TEMPERATURE (°C) R 8311 G30 CSP (kΩ) 8311 G31 8311f 10 For more information www.linear.com/LT8311 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
