Datasheet LT8311 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Synchronous Rectifier Controller with Opto-Coupler Driver for Forward Converters |
| Pages / Page | 48 / 8 — 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. VIN Quiescent Current,. Feedback Input Bias Current
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LT8311
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. VIN Quiescent Current, Feedback Input Bias Current No Switching Power Good Window
150 5.5 16 PGOOD = 100kΩ to 12V 133 5.0 12 TAGE (V) 115 4.5 VOL 8 PGOOD 98 QUIESCENT CURRENT (mA) 4.0 4 FB INPUT BIAS CURRENT (nA) V IN 80 3.5 0 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 1.00 1.10 1.20 1.30 1.40 TEMPERATURE (°C) TEMPERATURE (°C) FB VOLTAGE (V) 8311 G10 8311 G11 8311 G12
SS Pull-Down Amplifier SS Charge Current Offset Voltage Opto-Driver Output Swing Low
11.0 150 1000 10.5 TAGE (mV) 125 750 TAGE (mV) 10.0 100 500 TO LOW VOL SS CHARGE CURRENT (µA) 9.5 75 OP 250 SS PULL-DOWN AMP OFFSET VOL 9.0 50 0 –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 G13 8311 G14 8311 G15
Opto-Driver Output Swing High Opto-Driver Output Swing High vs Line Voltage
7.0 7 6 6.5 TAGE (V) TAGE (V) 5 6.0 4 TO HIGH VOL TO HIGH VOL OP 5.5 OP 3 5.0 2 –75 –50 –25 0 25 50 75 100 125 150 3 6 9 12 15 18 21 24 27 30 TEMPERATURE (°C) VIN (V) 8311 G16 8311 G17 8311f 8 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. VIN Quiescent Current, Feedback Input Bias Current No Switching Power Good Window
150 5.5 16 PGOOD = 100kΩ to 12V 133 5.0 12 TAGE (V) 115 4.5 VOL 8 PGOOD 98 QUIESCENT CURRENT (mA) 4.0 4 FB INPUT BIAS CURRENT (nA) V IN 80 3.5 0 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 1.00 1.10 1.20 1.30 1.40 TEMPERATURE (°C) TEMPERATURE (°C) FB VOLTAGE (V) 8311 G10 8311 G11 8311 G12
SS Pull-Down Amplifier SS Charge Current Offset Voltage Opto-Driver Output Swing Low
11.0 150 1000 10.5 TAGE (mV) 125 750 TAGE (mV) 10.0 100 500 TO LOW VOL SS CHARGE CURRENT (µA) 9.5 75 OP 250 SS PULL-DOWN AMP OFFSET VOL 9.0 50 0 –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 G13 8311 G14 8311 G15
Opto-Driver Output Swing High Opto-Driver Output Swing High vs Line Voltage
7.0 7 6 6.5 TAGE (V) TAGE (V) 5 6.0 4 TO HIGH VOL TO HIGH VOL OP 5.5 OP 3 5.0 2 –75 –50 –25 0 25 50 75 100 125 150 3 6 9 12 15 18 21 24 27 30 TEMPERATURE (°C) VIN (V) 8311 G16 8311 G17 8311f 8 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
