Datasheet LTC7862 (Analog Devices) - 8

ManufacturerAnalog Devices
Description140V High Efficiency Switching Surge Stopper
Pages / Page32 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. …
File Format / SizePDF / 1.7 Mb
Document LanguageEnglish

TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. BOOST Charge Pump Charging. Current vs Frequency

TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted BOOST Charge Pump Charging Current vs Frequency

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LTC7862
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. BOOST Charge Pump Charging BOOST Charge Pump Charging Current vs Frequency Current vs SW Voltage
100 100 VBOOST = 16V FREQ = 350kHz 90 VSW = 12V 90 80 80 70 70 60 60 50 50 40 40 VBOOST - VSW = 4V 30 30 VBOOST - VSW = 7V 20 150°C 20 150°C 25°C 10 25°C 10 CHARGE PUMP CHARGING CURRENT (µA) –55°C CHARGE PUMP CHARGING CURRENT (µA) –55°C 0 0 0 100 200 300 400 500 600 700 800 900 1000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 OPERATING FREQUENCY (kHz) SW VOLTAGE (V) 7862 G19 7862 G20
TMR Pull-Up Current TMR Pull-Down Current vs vs Temperature Temperature Sustained Overvoltage Fault
–35 1.5 100V –36 1.4 VIN –37 1.3 28V VOUT VIN/VOUT –38 1.2 50V/DIV –39 1.1 TMR 2V/DIV –40 1.0 WARNB –41 0.9 5V/DIV TMR CURRENT (µA) –42 TMR CURRENT (µA) 0.8 FIGURE 8 CIRCUIT VOUT = 28V, CTMR = 1µF –43 0.7 1s/DIV 7862 G23 –44 0.6 –45 0.5 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 7862 G21 7862 G22
Power Loss vs Output Current in Power Loss vs Output Current in Power Loss vs Output Current in Pass-Through Mode Pass-Through Mode Pass-Through Mode
2500 2000 1500 VIN = 12V V V 2250 IN = 14V IN = 48V VIN = 28V 1750 FIGURE 10 CIRCUIT FIGURE 11 CIRCUIT 2000 FIGURE 8 CIRCUIT 1250 1500 1750 1000 1500 1250 1250 1000 750 1000 750 POWER LOSS (mW) 750 POWER LOSS (mW) 500 POWER LOSS (mW) 500 500 250 250 250 0 0 0 0 2 4 6 8 10 12 14 16 18 20 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 OUTPUT CURRENT (A) OUTPUT CURRENT (A) OUTPUT CURRENT (A) 7862 G24 7862 G25 7862 G26 Rev 0 8 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 PIN FUNCTIONS TIMING DIAGRAM FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS