Datasheet LT3492 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Triple Output LED Driver with 3000:1 PWM Dimming |
| 页数 / 页 | 22 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). … |
| 文件格式/大小 | PDF / 338 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). Switch Frequency vs Temperature
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LT3492
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Switch Frequency vs Temperature VISP-VISN Threshold vs CTRL VISP-VISN Threshold vs VISP
1.4 120 103 FADJ = 0.5V VISP = 24V CTRL = 1.2V 100 102 1.3 80 101 1.2 60 100 THRESHOLD (mV) TRHESHOLD (mV) ISN ISN -V 40 V 99 1.1 ISP SWITCH FREQUENCY (MHz) V ISP-V 20 98 1.0 0 97 –50 –25 0 25 50 75 100 125 0 0.2 0.4 0.6 0.8 1 1.2 0 10 20 30 40 50 60 CTRL (V) TEMPERATURE (°C) VISP (V) 3492 G08 3492 G07 3492 G09
VISP-VISN Threshold vs Temperature PMOS Turn On Waveforms PMOS Turn Off Waveforms
103 CTRL = 1.2V VISP = 24V 102 5V 5V PWM PWM 101 0V 0V 100 THRESHOLD (mV) 60V 60V ISNV 99 TG TG ISP-V 50V 50V 98 97 3492 G11 3492 G12 –50 –25 0 25 50 75 100 125 V 200ns/DIV ISP = 60V V 200ns/DIV ISP = 60V Q TEMPERATURE (°C) G FET = 6nC Q 3492 G10 G FET = 6nC 3492fa 6
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Switch Frequency vs Temperature VISP-VISN Threshold vs CTRL VISP-VISN Threshold vs VISP
1.4 120 103 FADJ = 0.5V VISP = 24V CTRL = 1.2V 100 102 1.3 80 101 1.2 60 100 THRESHOLD (mV) TRHESHOLD (mV) ISN ISN -V 40 V 99 1.1 ISP SWITCH FREQUENCY (MHz) V ISP-V 20 98 1.0 0 97 –50 –25 0 25 50 75 100 125 0 0.2 0.4 0.6 0.8 1 1.2 0 10 20 30 40 50 60 CTRL (V) TEMPERATURE (°C) VISP (V) 3492 G08 3492 G07 3492 G09
VISP-VISN Threshold vs Temperature PMOS Turn On Waveforms PMOS Turn Off Waveforms
103 CTRL = 1.2V VISP = 24V 102 5V 5V PWM PWM 101 0V 0V 100 THRESHOLD (mV) 60V 60V ISNV 99 TG TG ISP-V 50V 50V 98 97 3492 G11 3492 G12 –50 –25 0 25 50 75 100 125 V 200ns/DIV ISP = 60V V 200ns/DIV ISP = 60V Q TEMPERATURE (°C) G FET = 6nC Q 3492 G10 G FET = 6nC 3492fa 6