Datasheet LT1943 (Analog Devices) - 6
| Fabricante | Analog Devices |
| Descripción | High Current Quad Output Regulator for TFT LCD Panels |
| Páginas / Página | 20 / 6 — TYPICAL PERFOR A CE CHARACTERISTICS. VON Current Limit. Oscillator … |
| Formato / tamaño de archivo | PDF / 278 Kb |
| Idioma del documento | Inglés |
TYPICAL PERFOR A CE CHARACTERISTICS. VON Current Limit. Oscillator Frequency. Frequency Foldback. Reference Voltage
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LT1943
W U TYPICAL PERFOR A CE CHARACTERISTICS VON Current Limit Oscillator Frequency Frequency Foldback
100 1.4 1.4 TA = 25°C TA = 25°C 90 1.2 1.3 80 1.0 70 0.8 1.2 60 0.6 CURRENT (mA) ONV FREQUENCY (MHz) 50 0.4 1.1 SWITCHING FREQUENCY (MHz) 40 0.2 30 1.0 0 5 10 15 20 25 30 35 40 –50 –25 0 25 50 75 100 125 0 0.2 0.4 0.6 0.8 1.0 1.2 VON (V) TEMPERATURE (°C) FEEDBACK VOLTAGE (V) 1943 G13 1943 G14 1943 G15
Reference Voltage Bias Pin Current
1.27 100 1.26 80 1.25 60 ISW2 = 1.5A ISW3 = 0.2A 1.24 40 ISW4 = 0.3A REFERENCE VOLTAGE (V) BIAS PIN CURRENT (mA) 1.23 20 ISW2 = ISW3 = ISW4 = 0A 1.22 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 1943 G16 1943 G17
Efficiency, AVDD = 13V Efficiency, VLOGIC = 3.3V
100 100 VIN = 5V VIN = 5V TA = 25°C TA = 25°C 90 90 80 80 70 70 EFFICIENCY (%) EFFICIENCY (%) 60 60 50 50 0 0.1 0.2 0.3 0.4 0.5 0 0.25 0.50 0.75 1.00 1.25 1.50 LOAD CURRENT (A) LOAD CURRENT (A) 1943 G18 1943 G19 1943fa 6
W U TYPICAL PERFOR A CE CHARACTERISTICS VON Current Limit Oscillator Frequency Frequency Foldback
100 1.4 1.4 TA = 25°C TA = 25°C 90 1.2 1.3 80 1.0 70 0.8 1.2 60 0.6 CURRENT (mA) ONV FREQUENCY (MHz) 50 0.4 1.1 SWITCHING FREQUENCY (MHz) 40 0.2 30 1.0 0 5 10 15 20 25 30 35 40 –50 –25 0 25 50 75 100 125 0 0.2 0.4 0.6 0.8 1.0 1.2 VON (V) TEMPERATURE (°C) FEEDBACK VOLTAGE (V) 1943 G13 1943 G14 1943 G15
Reference Voltage Bias Pin Current
1.27 100 1.26 80 1.25 60 ISW2 = 1.5A ISW3 = 0.2A 1.24 40 ISW4 = 0.3A REFERENCE VOLTAGE (V) BIAS PIN CURRENT (mA) 1.23 20 ISW2 = ISW3 = ISW4 = 0A 1.22 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 1943 G16 1943 G17
Efficiency, AVDD = 13V Efficiency, VLOGIC = 3.3V
100 100 VIN = 5V VIN = 5V TA = 25°C TA = 25°C 90 90 80 80 70 70 EFFICIENCY (%) EFFICIENCY (%) 60 60 50 50 0 0.1 0.2 0.3 0.4 0.5 0 0.25 0.50 0.75 1.00 1.25 1.50 LOAD CURRENT (A) LOAD CURRENT (A) 1943 G18 1943 G19 1943fa 6