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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC4012 датащи(PDF) 7 Page - Linear Technology |
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LTC4012 датащи(HTML) 7 Page - Linear Technology |
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7 / 28 page  7 4012f LTC4012/ LTC4012-1/LTC4012-2 TYPICAL PERFORMANCE CHARACTERISTICS PWM Frequency vs Duty Cycle Gate Drive Non-Overlap Battery Shutdown Current Charge Current Line Regulation Input Current Limit DCIN PIN VOLTAGE (V) 5 –0.5 –0.4 –0.2 –0.1 0 0.5 0.2 10 15 4012 G08 –0.3 0.3 0.4 0.1 20 25 ICHG = 1A ICHG = 2A ICHG = 3A BAT = 6V RSENSE = 33mΩ RIN = 3.01k Charge Current Load Regulation BATTERY VOLTAGE (V) 11.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 –0.5 12.6 4012 G09 11.4 11.8 12.2 13.0 ICHG = 3A ICHG = 2A ICHG = 1A DCIN = 20V RSENSE = 33mΩ RIN = 3.01k SYSTEM LOAD (A) 0 0.5 1.0 1.5 1.5 2.5 4012 G10 0 –0.5 –1.0 0.5 1.0 2.0 2.0 2.5 3.0 IIN ICHG ICL STATE 2.5A BULK CHARGE 2.1A INPUT CURRENT LIMIT PWM Soft-Start ICHG 2A/DIV TIME (500μs/DIV) 4012 G11 ITH 1V/DIV PROG 1V/DIV SHDN 5V/DIV TIME (80ns/DIV) 4012 G12 TGATE BGATE DUTY CYCLE (%) 0 0 100 200 300 400 500 600 20 40 60 80 4012 G13 100 CLP = 6V CLP = 12V CLP = 20V CLP = 25V ICHG = 750mA PWM Frequency vs Charge Current CHARGE CURRENT (A) 0 0 100 200 300 400 600 0.5 1.0 1.5 2.0 4012 G14 2.5 3.0 500 BAT = 14.5V BAT = 12V BAT = 5V CLP = 15V RSENSE = 33mΩ RIN = 3.01k BATTERY VOLTAGE (V) 0 0 5 10 15 25 510 15 4012 G15 20 25 20 DC1256-CLASS APPLICATION DCIN = 0V LTC4012, ALL PINS DCIN = 0V LTC4012, BAT PINS DCIN = 20V (TA = 25°C unless otherwise noted. L = IHLP-2525 6.8μH) INFET Response Time to DCIN Short to Ground 0A VGS = 0V TIME (1μs/DIV) DCIN = 15V INFET = Si7423DN IOUT = <50mA VOUT = 12.3V COUT = 0.27F 4012 G16 PFET VGS (1V/DIV) IDCIN, REVERSE (5A/DIV) |
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