Datasheet LT3745-1 (Analog Devices) - 9
| 制造商 | Analog Devices |
| 描述 | 16-Channel 50mA LED Driver with Buck Controller |
| 页数 / 页 | 28 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 391 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Oscillator Frequency fOSC. FB Regulation Voltage
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LT3745-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Oscillator Frequency fOSC FB Regulation Voltage LED Regulation Voltage vs Temperature vs Load Current vs Load Current
520 1.216 0.72 1.214 0.70 510 1.212 0.68 (kHz) 500 (V) (V) 1.210 0.66 f OSC V FB V LED 1.208 0.64 490 1.206 0.62 480 1.204 0.60 –50 –25 0 25 50 75 100 125 0 200 400 600 800 1000 1200 0 200 400 600 800 1000 1200 JUNCTION TEMPERATURE (°C) LOAD CURRENT (mA) LOAD CURRENT (mA) 37451 G19 37451 G20 37451 G21
Soft-Start Charge Current ISS CAP Bias Voltage (VIN-VCAP) vs Temperature Current Sense Threshold vs VISN vs VIN
–10.0 60 6.90 –10.2 55 6.86 T = 125°C –10.4 (mV) 50 (V) 6.82 T = 25°C (µA) ISN T = –40°C CAP-V I SS – V T = 25°C –10.6 45 IN T = 125°C 6.78 V ISP V –10.8 40 6.74 T = –40°C –11.0 35 6.70 –50 –25 0 25 50 75 100 125 0 10 20 30 40 0 10 20 30 40 50 60 JUNCTION TEMPERATURE (°C) VISN (V) VIN (V) 37451 G22 37451 G23 37451 G24
CAP Bias Voltage (VIN-VCAP) vs ICAP VISET Pin Voltage vs Temperature
6.90 1.210 6.80 T = 25°C 1.208 6.70 T = –40°C (V) 6.60 1.206 (V) CAP-V T = 125°C ISET IN 6.50 V V 1.204 6.40 1.202 6.30 6.20 1.200 0 4 8 12 16 20 24 –50 –25 0 25 50 75 100 125 ICAP (mA) JUNCTION TEMPERATURE (°C) 37451 G25 37451 G26 37451f 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Oscillator Frequency fOSC FB Regulation Voltage LED Regulation Voltage vs Temperature vs Load Current vs Load Current
520 1.216 0.72 1.214 0.70 510 1.212 0.68 (kHz) 500 (V) (V) 1.210 0.66 f OSC V FB V LED 1.208 0.64 490 1.206 0.62 480 1.204 0.60 –50 –25 0 25 50 75 100 125 0 200 400 600 800 1000 1200 0 200 400 600 800 1000 1200 JUNCTION TEMPERATURE (°C) LOAD CURRENT (mA) LOAD CURRENT (mA) 37451 G19 37451 G20 37451 G21
Soft-Start Charge Current ISS CAP Bias Voltage (VIN-VCAP) vs Temperature Current Sense Threshold vs VISN vs VIN
–10.0 60 6.90 –10.2 55 6.86 T = 125°C –10.4 (mV) 50 (V) 6.82 T = 25°C (µA) ISN T = –40°C CAP-V I SS – V T = 25°C –10.6 45 IN T = 125°C 6.78 V ISP V –10.8 40 6.74 T = –40°C –11.0 35 6.70 –50 –25 0 25 50 75 100 125 0 10 20 30 40 0 10 20 30 40 50 60 JUNCTION TEMPERATURE (°C) VISN (V) VIN (V) 37451 G22 37451 G23 37451 G24
CAP Bias Voltage (VIN-VCAP) vs ICAP VISET Pin Voltage vs Temperature
6.90 1.210 6.80 T = 25°C 1.208 6.70 T = –40°C (V) 6.60 1.206 (V) CAP-V T = 125°C ISET IN 6.50 V V 1.204 6.40 1.202 6.30 6.20 1.200 0 4 8 12 16 20 24 –50 –25 0 25 50 75 100 125 ICAP (mA) JUNCTION TEMPERATURE (°C) 37451 G25 37451 G26 37451f 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Typical Application Related Parts