Datasheet LT8495 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | SEPIC/Boost Converter with 2A, 70V Switch, 9μA Quiescent Current, POR and Watchdog Timer |
| 页数 / 页 | 34 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 1.3 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switch VCESAT. Feedback Voltage. Oscillator Frequency
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LT8495
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switch VCESAT Feedback Voltage Oscillator Frequency
600 1.23 1.50 500 1.25 1.22 RT = 68.1k 400 1.00 (mV) T 1.21 CESA 300 TAGE (V) 0.75 1.20 200 FB VOL 0.50 SWITCH V FREQUENCY (MHz) 1.19 RT = 324k 100 0.25 0 1.18 0.00 0.0 0.5 1.0 1.5 2.0 –50 0 50 100 150 –50 0 50 100 150 SWITCH CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 8495 G10 8495 G11 8495 G12
Frequency Foldback Minimum Switch On-Time Minimum Switch Off-Time
1200 140 180 RT = 68.1k 160 1000 120 140 100 800 120 80 100 600 60 80 400 60 R 40 T = 324k SWITCH ON-TIME (ns) SWITCH OFF-TIME (ns) 40 SWITCHING FREQUENCY (kHz) 200 20 20 0 0 0 0.0 0.2 0.5 0.7 1.0 1.2 –50 0 50 100 150 –50 0 50 100 150 FB VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8495 G13 8495 G14 8495 G15
Overvoltage Lockout Watchdog Upper Boundary Period Watchdog Lower Boundary Period
35.5 20 760 CWDT = 1nF CWDT = 1nF TDK TDK 740 C2012COG1H102J 35.0 19 C2012C0G1H102J (µs) WDU (ms) WDL V 720 IN OR BIAS RISING TAGE (V) 34.5 18 700 Y PERIOD, t Y PERIOD t 34.0 V 680 IN OR BIAS FALLING 17 OR BIAS VOL 660 V IN 33.5 16 640 UPPER BOUNDAR LOWER BOUNDR 33.0 15 620 –50 0 50 100 150 –50 –10 30 70 110 150 –50 0 50 100 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8495 G16 8495 G17 8495 G18 8495fb 6 For more information www.linear.com/LT8495 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagrams Operation Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switch VCESAT Feedback Voltage Oscillator Frequency
600 1.23 1.50 500 1.25 1.22 RT = 68.1k 400 1.00 (mV) T 1.21 CESA 300 TAGE (V) 0.75 1.20 200 FB VOL 0.50 SWITCH V FREQUENCY (MHz) 1.19 RT = 324k 100 0.25 0 1.18 0.00 0.0 0.5 1.0 1.5 2.0 –50 0 50 100 150 –50 0 50 100 150 SWITCH CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 8495 G10 8495 G11 8495 G12
Frequency Foldback Minimum Switch On-Time Minimum Switch Off-Time
1200 140 180 RT = 68.1k 160 1000 120 140 100 800 120 80 100 600 60 80 400 60 R 40 T = 324k SWITCH ON-TIME (ns) SWITCH OFF-TIME (ns) 40 SWITCHING FREQUENCY (kHz) 200 20 20 0 0 0 0.0 0.2 0.5 0.7 1.0 1.2 –50 0 50 100 150 –50 0 50 100 150 FB VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8495 G13 8495 G14 8495 G15
Overvoltage Lockout Watchdog Upper Boundary Period Watchdog Lower Boundary Period
35.5 20 760 CWDT = 1nF CWDT = 1nF TDK TDK 740 C2012COG1H102J 35.0 19 C2012C0G1H102J (µs) WDU (ms) WDL V 720 IN OR BIAS RISING TAGE (V) 34.5 18 700 Y PERIOD, t Y PERIOD t 34.0 V 680 IN OR BIAS FALLING 17 OR BIAS VOL 660 V IN 33.5 16 640 UPPER BOUNDAR LOWER BOUNDR 33.0 15 620 –50 0 50 100 150 –50 –10 30 70 110 150 –50 0 50 100 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8495 G16 8495 G17 8495 G18 8495fb 6 For more information www.linear.com/LT8495 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagrams Operation Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts