Datasheet LT3761A (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 60VIN LED Controller with Internal PWM Generator |
| 页数 / 页 | 30 / 6 — Typical perFormance characTerisTics TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 660 Kb |
| 文件语言 | 英语 |
Typical perFormance characTerisTics TA = 25°C, unless otherwise noted. SENSE Current Limit Threshold
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LT3761A
Typical perFormance characTerisTics TA = 25°C, unless otherwise noted. SENSE Current Limit Threshold EN/UVLO Hysteresis Current EN/UVLO Threshold vs Temperature vs Temperature vs Temperature
110 2.8 1.27 2.6 105 1.25 RISING 2.4 100 1.23 2.2 FALLING SENSE THRESHOLD (mV) 95 EN/UVLO CURRENT (µA) 1.21 2.0 EN/UVLO THRESHOLD (V) 90 1.8 1.19 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3761A G11 3761A G10 3761A G12
INTVCC Current Limit vs INTVCC Dropout Voltage VISP-ISN C/10 Threshold vs Temperature vs Current, Temperature vs Temperature
40 0 35 –0.2 ISP = 24V 38 –0.4 TA = –45°C 30 –0.6 36 TA = 25°C 25 –0.8 (mV) ISN = 0V –1.0 34 20 CURRENT LIMIT (mA) V ISP-ISN LDO DROPOUT (V) –1.2 CC TA = 130°C INTV 32 –1.4 15 –1.6 V 30 IN = 7V –1.8 10 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) LDO CURRENT (mA) TEMPERATURE (°C) 3761A G15 3761A G13 3761A G14
PWM Signal Generator Duty Ratio PWM Signal Generator Frequency vs DIM/SS Current vs Duty Ratio PWMOUT Waveform
100 340 CPWMOUT = 2.2nF 90 CPWM = 47nF PWM 80 INPUT 320 5V/DIV 70 TIO (%) 60 PWMOUT Y RA 5V/DIV 50 300 40 30 PWMOUT DUT 280 20 PWMOUT FREQUENCY (Hz) 3761AA G18 200ns/DIV 10 0 260 –10 0 10 20 30 40 50 0 20 40 60 80 100 DIM/SS CURRENT (µA) DUTY RATIO (%) 3761A G16 3761A G17 3761af 6 For more information www.linear.com/LT3761A Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
Typical perFormance characTerisTics TA = 25°C, unless otherwise noted. SENSE Current Limit Threshold EN/UVLO Hysteresis Current EN/UVLO Threshold vs Temperature vs Temperature vs Temperature
110 2.8 1.27 2.6 105 1.25 RISING 2.4 100 1.23 2.2 FALLING SENSE THRESHOLD (mV) 95 EN/UVLO CURRENT (µA) 1.21 2.0 EN/UVLO THRESHOLD (V) 90 1.8 1.19 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3761A G11 3761A G10 3761A G12
INTVCC Current Limit vs INTVCC Dropout Voltage VISP-ISN C/10 Threshold vs Temperature vs Current, Temperature vs Temperature
40 0 35 –0.2 ISP = 24V 38 –0.4 TA = –45°C 30 –0.6 36 TA = 25°C 25 –0.8 (mV) ISN = 0V –1.0 34 20 CURRENT LIMIT (mA) V ISP-ISN LDO DROPOUT (V) –1.2 CC TA = 130°C INTV 32 –1.4 15 –1.6 V 30 IN = 7V –1.8 10 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) LDO CURRENT (mA) TEMPERATURE (°C) 3761A G15 3761A G13 3761A G14
PWM Signal Generator Duty Ratio PWM Signal Generator Frequency vs DIM/SS Current vs Duty Ratio PWMOUT Waveform
100 340 CPWMOUT = 2.2nF 90 CPWM = 47nF PWM 80 INPUT 320 5V/DIV 70 TIO (%) 60 PWMOUT Y RA 5V/DIV 50 300 40 30 PWMOUT DUT 280 20 PWMOUT FREQUENCY (Hz) 3761AA G18 200ns/DIV 10 0 260 –10 0 10 20 30 40 50 0 20 40 60 80 100 DIM/SS CURRENT (µA) DUTY RATIO (%) 3761A G16 3761A G17 3761af 6 For more information www.linear.com/LT3761A Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts