Datasheet LT3964 (Analog Devices) - 9
| 制造商 | Analog Devices |
| 描述 | Dual 36V Synchronous 1.6A Buck LED Driver with I2C |
| 页数 / 页 | 36 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 3.8 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Minimum On-Time vs. Minimum Off-Time vs
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LT3964
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Minimum On-Time vs Minimum Off-Time vs Top Switch Current Limit vs Temperature Temperature Minimum OFF Time vs Temperature Temperature
60 58 2.00 ILED = 1A I 58 LED = 1A 57 1.95 56 56 1.90 54 55 52 1.85 54 50 53 1.80 48 52 46 1.75 MIN ON-TIME (V) MIN OFF-TIME (V) 44 51 1.70 50 TOP SW CURRENT LIMIT (A) 42 1.65 40 49 38 48 1.60 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3964 G28 3964 G29 3964 G30
Top Switch Current Limit vs Power Switch On-Resistance vs Duty Cycle Temperature vs Temperature PWMTG Rising Edge
2.2 400 FREQ = 1MHz TOP SWITCH 2.1 350 BOTTOM SWITCH VPWMTG 5V/DIV 2.0 300 ANCE (mΩ) 1.9 250 1.8 200 VPWM 2V/DIV 1.7 150 1.6 100 TOP SWITCH CURRENT LIMIT (A) 3964 G33 1.5 50 100ns/DIV POWER SWITCH ON RESIST 1.4 0 0 10 20 30 40 50 60 70 80 90 100 –55 –25 5 35 65 95 125 155 DUTY CYCLE (%) TEMPERATURE (°C) 3964 G31 3964 G32
Transient Response at VIN = 34V Transient Response at VIN = 34V Zero LED On to One LED On One LED On to Zero LED On PWMTG Falling Edge
IL1 IL1 200mA/DIV V 200mA/DIV PWMTG 5V/DIV ILED1 ILED1 200mA/DIV 200mA/DIV VPWM 2V/DIV 5µs/DIV 3964 G35 5µs/DIV 3964 G36 100ns/DIV 3964 G34 SEE MATRIX LED DRIVER ON PAGE 31 SEE MATRIX LED DRIVER ON PAGE 31 3964fb For more information www.linear.com/LT3964 9
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Minimum On-Time vs Minimum Off-Time vs Top Switch Current Limit vs Temperature Temperature Minimum OFF Time vs Temperature Temperature
60 58 2.00 ILED = 1A I 58 LED = 1A 57 1.95 56 56 1.90 54 55 52 1.85 54 50 53 1.80 48 52 46 1.75 MIN ON-TIME (V) MIN OFF-TIME (V) 44 51 1.70 50 TOP SW CURRENT LIMIT (A) 42 1.65 40 49 38 48 1.60 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3964 G28 3964 G29 3964 G30
Top Switch Current Limit vs Power Switch On-Resistance vs Duty Cycle Temperature vs Temperature PWMTG Rising Edge
2.2 400 FREQ = 1MHz TOP SWITCH 2.1 350 BOTTOM SWITCH VPWMTG 5V/DIV 2.0 300 ANCE (mΩ) 1.9 250 1.8 200 VPWM 2V/DIV 1.7 150 1.6 100 TOP SWITCH CURRENT LIMIT (A) 3964 G33 1.5 50 100ns/DIV POWER SWITCH ON RESIST 1.4 0 0 10 20 30 40 50 60 70 80 90 100 –55 –25 5 35 65 95 125 155 DUTY CYCLE (%) TEMPERATURE (°C) 3964 G31 3964 G32
Transient Response at VIN = 34V Transient Response at VIN = 34V Zero LED On to One LED On One LED On to Zero LED On PWMTG Falling Edge
IL1 IL1 200mA/DIV V 200mA/DIV PWMTG 5V/DIV ILED1 ILED1 200mA/DIV 200mA/DIV VPWM 2V/DIV 5µs/DIV 3964 G35 5µs/DIV 3964 G36 100ns/DIV 3964 G34 SEE MATRIX LED DRIVER ON PAGE 31 SEE MATRIX LED DRIVER ON PAGE 31 3964fb For more information www.linear.com/LT3964 9