Datasheet LTC3777 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller + Switching Bias Supply |
| Pages / Page | 40 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency and Power Loss. vs Load … |
| Revision | A |
| File Format / Size | PDF / 2.8 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency and Power Loss. vs Load Current and Input Voltage. Continuous Mode
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LTC3777
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency and Power Loss vs Load Current and Input Voltage Efficiency and Power Loss Continuous Mode vs Input Voltage
100 10 100 10 V EFFICIENCY OUT = 12V FIGURE 18 CIRCUIT 96 9 IOUT = 5A VOUT = 48V 92 f 8 97 8 SW = 250kHz 88 7 POWER LOSS (W) POWER LOSS (W) 84 6 94 6 V EFFICIENCY IN = 72V 80 V 5 IN = 48V 76 VIN = 24V 4 91 4 EFFICIENCY (%) EFFICIENCY (%) 72 3 POWER LOSS 68 2 88 2 64 POWER LOSS 1 60 0 85 0 0.1 1 10 5 10 15 20 25 30 35 40 45 50 55 LOAD CURRENT (A) VIN VOLTAGE (V) 3777 G02 CIRCUIT OF FIGURE 19 3777 G01
Load Step Boost Region Load Step Boost Region Load Step Buck-Boost Region Continuous Mode Pulse-Skipping Mode Continuous Mode
ILOAD ILOAD ILOAD 5A/DIV 5A/DIV 5A/DIV IL I IL 5A/DIV L 5A/DIV 5A/DIV VOUT VOUT VOUT 1V/DIV 1V/DIV 1V/DIV AC-COUPLED AC-COUPLED AC-COUPLED 200µs/DIV 3777 G03 200µs/DIV 3777 G04 200µs/DIV 3777 G05 VIN = 36V VIN = 36V VIN = 48V VOUT = 48V VOUT = 48V VOUT = 48V
Load Step Buck-Boost Region Load Step Buck Region Load Step Buck Region Pulse-Skipping Mode Continuous Mode Pulse-Skipping Mode
ILOAD ILOAD ILOAD 5A/DIV 5A/DIV 5A/DIV IL IL IL 5A/DIV 5A/DIV 5A/DIV VOUT VOUT VOUT 1V/DIV 1V/DIV 1V/DIV AC-COUPLED AC-COUPLED AC-COUPLED 200µs/DIV 3777 G06 200µs/DIV 3777 G07 200µs/DIV 3777 G08 VIN = 48V VIN = 120V VIN = 120V VOUT = 48V VOUT = 48V VOUT = 48V Rev A 6 For more information www.analog.com Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS – SWITCHING BIAS SUPPLY PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency and Power Loss vs Load Current and Input Voltage Efficiency and Power Loss Continuous Mode vs Input Voltage
100 10 100 10 V EFFICIENCY OUT = 12V FIGURE 18 CIRCUIT 96 9 IOUT = 5A VOUT = 48V 92 f 8 97 8 SW = 250kHz 88 7 POWER LOSS (W) POWER LOSS (W) 84 6 94 6 V EFFICIENCY IN = 72V 80 V 5 IN = 48V 76 VIN = 24V 4 91 4 EFFICIENCY (%) EFFICIENCY (%) 72 3 POWER LOSS 68 2 88 2 64 POWER LOSS 1 60 0 85 0 0.1 1 10 5 10 15 20 25 30 35 40 45 50 55 LOAD CURRENT (A) VIN VOLTAGE (V) 3777 G02 CIRCUIT OF FIGURE 19 3777 G01
Load Step Boost Region Load Step Boost Region Load Step Buck-Boost Region Continuous Mode Pulse-Skipping Mode Continuous Mode
ILOAD ILOAD ILOAD 5A/DIV 5A/DIV 5A/DIV IL I IL 5A/DIV L 5A/DIV 5A/DIV VOUT VOUT VOUT 1V/DIV 1V/DIV 1V/DIV AC-COUPLED AC-COUPLED AC-COUPLED 200µs/DIV 3777 G03 200µs/DIV 3777 G04 200µs/DIV 3777 G05 VIN = 36V VIN = 36V VIN = 48V VOUT = 48V VOUT = 48V VOUT = 48V
Load Step Buck-Boost Region Load Step Buck Region Load Step Buck Region Pulse-Skipping Mode Continuous Mode Pulse-Skipping Mode
ILOAD ILOAD ILOAD 5A/DIV 5A/DIV 5A/DIV IL IL IL 5A/DIV 5A/DIV 5A/DIV VOUT VOUT VOUT 1V/DIV 1V/DIV 1V/DIV AC-COUPLED AC-COUPLED AC-COUPLED 200µs/DIV 3777 G06 200µs/DIV 3777 G07 200µs/DIV 3777 G08 VIN = 48V VIN = 120V VIN = 120V VOUT = 48V VOUT = 48V VOUT = 48V Rev A 6 For more information www.analog.com Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS – SWITCHING BIAS SUPPLY PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
