Datasheet LTC3766 (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | High Efficiency, Secondary-Side Synchronous Forward Controller |
| Seiten / Seite | 62 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. Oscillator Frequency. vs … |
| Dateiformat / Größe | PDF / 2.0 Mb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. Oscillator Frequency. vs Temperature. FB Voltage vs Temperature. SGD Delay vs Resistance
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LTC3766
TYPICAL PERFORMANCE CHARACTERISTICS Oscillator Frequency vs Temperature FB Voltage vs Temperature SGD Delay vs Resistance
2.0 599.8 250 MODE = 100k TO GND 599.6 SW TIED TO PT+ 1.5 599.4 200 1.0 599.2 150 599.0 SG RISING 0.5 (mV) FG FALLING V FB 598.8 DELAY (ns) 100 0 598.6 CHANGE IN FREQUENCY (%) 598.4 –0.5 FS = 18.7k 50 FS = 124k 598.2 FS = VCC –1.0 598.0 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 10 20 30 40 50 TEMPERATURE (°C) TEMPERARTURE (°C) RSGD (kΩ) 3766 G10 3766 G11 3766 G12
FGD Delay vs Resistance SGD Delay vs Temperature FGD Delay vs Temperature
700 250 600 600 RSGD = 49.9k RFGD = 100k 200 500 500 400 400 150 300 300 DELAY (ns) DELAY (ns) 100 DELAY (ns) RSGD = 15k 200 200 50 100 100 RFGD = 10k 0 0 0 0 20 40 60 80 100 120 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 RFGD (kΩ) TEMPERATURE (°C) TEMPERATURE (°C) 3766 G13 3766 G14 3766 G15
Gate Driver On-Resistance vs VCC Voltage Efficiency (Figure 39 Circuit) Load Step (Figure 39 Circuit)
2.25 96 2.00 VOUT 94 200mV/DIV 1.75 PT+, PT– PULL-DOWN I 1.50 92 OUT 5A/DIV 1.25 ALL GATES 90 RESISTANCE (Ω) PULL-UP EFFICIENCY (%) 1.00 20µs/DIV 3766 G18 VIN = 48V FG,SG 88 V VOUT = 5V 0.75 IN = 36V PULL-DOWN V LOAD STEP = 5A TO 15A IN = 48V VIN = 72V 0.50 86 5 6 7 8 9 10 11 12 3 5 7 9 11 13 15 VCC VOLTAGE (V) LOAD CURRENT (A) 3766 G16 3766 G17 3766fc For more information www.linear.com/LTC3766 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Typical Applications Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Oscillator Frequency vs Temperature FB Voltage vs Temperature SGD Delay vs Resistance
2.0 599.8 250 MODE = 100k TO GND 599.6 SW TIED TO PT+ 1.5 599.4 200 1.0 599.2 150 599.0 SG RISING 0.5 (mV) FG FALLING V FB 598.8 DELAY (ns) 100 0 598.6 CHANGE IN FREQUENCY (%) 598.4 –0.5 FS = 18.7k 50 FS = 124k 598.2 FS = VCC –1.0 598.0 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 10 20 30 40 50 TEMPERATURE (°C) TEMPERARTURE (°C) RSGD (kΩ) 3766 G10 3766 G11 3766 G12
FGD Delay vs Resistance SGD Delay vs Temperature FGD Delay vs Temperature
700 250 600 600 RSGD = 49.9k RFGD = 100k 200 500 500 400 400 150 300 300 DELAY (ns) DELAY (ns) 100 DELAY (ns) RSGD = 15k 200 200 50 100 100 RFGD = 10k 0 0 0 0 20 40 60 80 100 120 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 RFGD (kΩ) TEMPERATURE (°C) TEMPERATURE (°C) 3766 G13 3766 G14 3766 G15
Gate Driver On-Resistance vs VCC Voltage Efficiency (Figure 39 Circuit) Load Step (Figure 39 Circuit)
2.25 96 2.00 VOUT 94 200mV/DIV 1.75 PT+, PT– PULL-DOWN I 1.50 92 OUT 5A/DIV 1.25 ALL GATES 90 RESISTANCE (Ω) PULL-UP EFFICIENCY (%) 1.00 20µs/DIV 3766 G18 VIN = 48V FG,SG 88 V VOUT = 5V 0.75 IN = 36V PULL-DOWN V LOAD STEP = 5A TO 15A IN = 48V VIN = 72V 0.50 86 5 6 7 8 9 10 11 12 3 5 7 9 11 13 15 VCC VOLTAGE (V) LOAD CURRENT (A) 3766 G16 3766 G17 3766fc For more information www.linear.com/LTC3766 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Typical Applications Typical Applications Package Description Revision History Typical Application Related Parts