Datasheet LTC7815 (Analog Devices) - 8
| Fabricante | Analog Devices |
| Descripción | Low IQ, 2.25MHz, Triple Output, Buck/Buck/Boost Synchronous Controller |
| Páginas / Página | 38 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency and Power Loss. … |
| Formato / tamaño de archivo | PDF / 1.4 Mb |
| Idioma del documento | Inglés |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency and Power Loss. Efficiency. Efficiency vs Input Voltage
Línea de modelo para esta hoja de datos
Versión de texto del documento
LTC7815
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency and Power Loss Efficiency Efficiency vs Input Voltage vs Output Current (Boost) vs Output Current (Boost) (Boost)
100 10k 100 100 FIGURE 9 CIRCUIT 90 BURST EFFICIENCY 90 98 VBIAS = VIN FCM LOSS VOUT = 10V 80 1k 80 96 ILOAD = 2A POWER LOSS (mW) 70 70 94 60 100 60 92 50 50 90 40 PULSE–SKIPPING 10 40 88 EFFICIENCY (%) LOSS EFFICIENCY (%) EFFICIENCY (%) 30 BURST 30 86 LOSS FCM EFFICIENCY 20 1 20 84 FIGURE 9 CIRCUIT 10 PULSE–SKIPPING 10 VBIAS = VIN VIN = 7V 82 EFFICIENCY VOUT = 10V VIN = 5V 0 0.1 0 80 0.0001 0.001 0.01 0.1 1 10 0.0001 0.001 0.01 0.1 1 10 2 3 4 5 6 7 8 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT VOLTAGE (V) 7815 G10 7815 G11 7815 G12 FIGURE 9 CIRCUIT VIN = 5V, VOUT = 10V, Bias = VIN
Load Step (Boost) Load Step (Boost) Load Step (Boost) Burst Mode Operation Pulse-Skipping Mode Forced Continuous Mode
V V V OUT OUT OUT 100mV/DIV 100mV/DIV 100mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED I IL I L L 5A/DIV 5A/DIV 5A/DIV 50µs/DIV 7815 G13 50µs/DIV 7815 G14 50µs/DIV 7815 G15 VOUT = 10V VOUT = 10V VOUT = 10V VIN = 5V VIN = 5V VIN = 5V FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT
Inductor Current at Light Load Boost Regulated Feedback (Boost) Soft Start-Up (Boost) Voltage vs Temperature
1.212 FORCED 1.209 CONTINUOUS MODE TAGE (V) 1.206 VOUT3 1.203 2V/DIV Burst Mode OPERATION 1.200 5A/DIV RUN3 PULSE- 1.197 5V/DIV SKIPPING TED FEEDBACK VOL GND MODE 1.194 1µs/DIV 7815 G16 5ms/DIV 7815 G17 REGULA 1.191 V V OUT = 10V IN = 5V V FIGURE 9 CIRCUIT IN = 5V 1.188 ILOAD = 1mA –75 –50 –25 0 25 50 75 100 120 150 FIGURE 9 CIRCUIT TEMPERATURE (°C) 7815 G18 7815f 8 For more information www.linear.com/LTC7815 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency and Power Loss Efficiency Efficiency vs Input Voltage vs Output Current (Boost) vs Output Current (Boost) (Boost)
100 10k 100 100 FIGURE 9 CIRCUIT 90 BURST EFFICIENCY 90 98 VBIAS = VIN FCM LOSS VOUT = 10V 80 1k 80 96 ILOAD = 2A POWER LOSS (mW) 70 70 94 60 100 60 92 50 50 90 40 PULSE–SKIPPING 10 40 88 EFFICIENCY (%) LOSS EFFICIENCY (%) EFFICIENCY (%) 30 BURST 30 86 LOSS FCM EFFICIENCY 20 1 20 84 FIGURE 9 CIRCUIT 10 PULSE–SKIPPING 10 VBIAS = VIN VIN = 7V 82 EFFICIENCY VOUT = 10V VIN = 5V 0 0.1 0 80 0.0001 0.001 0.01 0.1 1 10 0.0001 0.001 0.01 0.1 1 10 2 3 4 5 6 7 8 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT VOLTAGE (V) 7815 G10 7815 G11 7815 G12 FIGURE 9 CIRCUIT VIN = 5V, VOUT = 10V, Bias = VIN
Load Step (Boost) Load Step (Boost) Load Step (Boost) Burst Mode Operation Pulse-Skipping Mode Forced Continuous Mode
V V V OUT OUT OUT 100mV/DIV 100mV/DIV 100mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED I IL I L L 5A/DIV 5A/DIV 5A/DIV 50µs/DIV 7815 G13 50µs/DIV 7815 G14 50µs/DIV 7815 G15 VOUT = 10V VOUT = 10V VOUT = 10V VIN = 5V VIN = 5V VIN = 5V FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT
Inductor Current at Light Load Boost Regulated Feedback (Boost) Soft Start-Up (Boost) Voltage vs Temperature
1.212 FORCED 1.209 CONTINUOUS MODE TAGE (V) 1.206 VOUT3 1.203 2V/DIV Burst Mode OPERATION 1.200 5A/DIV RUN3 PULSE- 1.197 5V/DIV SKIPPING TED FEEDBACK VOL GND MODE 1.194 1µs/DIV 7815 G16 5ms/DIV 7815 G17 REGULA 1.191 V V OUT = 10V IN = 5V V FIGURE 9 CIRCUIT IN = 5V 1.188 ILOAD = 1mA –75 –50 –25 0 25 50 75 100 120 150 FIGURE 9 CIRCUIT TEMPERATURE (°C) 7815 G18 7815f 8 For more information www.linear.com/LTC7815 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS