Datasheet LTC4012, LTC4012-1, LTC4012-2 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control |
| 页数 / 页 | 28 / 7 — (TA = 25°C unless otherwise noted. L = IHLP-2525 6.8µH). Charge Current … |
| 文件格式/大小 | PDF / 395 Kb |
| 文件语言 | 英语 |
(TA = 25°C unless otherwise noted. L = IHLP-2525 6.8µH). Charge Current Line Regulation. Charge Current Load Regulation
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文件文字版本
LTC4012/ LTC4012-1/LTC4012-2 typical perForMance characteristics
(TA = 25°C unless otherwise noted. L = IHLP-2525 6.8µH) Charge Current Line Regulation Charge Current Load Regulation Input Current Limit
0.5 3.5 3.0 BAT = 6V 0.4 ICHG = 3A RSENSE = 33mΩ 3.0 2.5 I 0.3 RIN = 3.01k IN 2.5 2.0 0.2 ICHG = 1A ICHG = 2A ICHG 0.1 2.0 1.5 0 ICHG = 2A 1.5 1.0 I –0.1 CHG = 1A I 1.0 CURRENT (A) 0.5 2.5A BULK CHARGE CHG = 3A –0.2 2.1A INPUT CURRENT LIMIT CHARGE CURRENT (A) 0.5 0 CHARGE CURRENT ERROR (%) –0.3 DCIN = 20V –0.4 0 RSENSE = 33mΩ –0.5 ICL STATE RIN = 3.01k –0.5 –0.5 –1.0 5 10 15 20 25 11.0 11.4 11.8 12.2 12.6 13.0 0 0.5 1.0 1.5 2.0 2.5 DCIN PIN VOLTAGE (V) BATTERY VOLTAGE (V) SYSTEM LOAD (A) 4012 G08 4012 G09 4012 G10
PWM Soft-Start Gate Drive Non-Overlap PWM Frequency vs Duty Cycle
600 ICHG = 750mA ICHG 2A/DIV /DIV) BGATE 500 ITH 1V/DIV 400 PROG 300 1V/DIV TGATE 200 SHDN EXTERNAL FET DRIVE (1V PWM FREQUENCY (kHz) 5V/DIV CLP = 6V TIME (500µs/DIV) 4012 G11 TIME (80ns/DIV) 4012 G12 100 CLP = 12V CLP = 20V CLP = 25V 0 0 20 40 60 80 100 DUTY CYCLE (%) 4012 G13
PWM Frequency INFET Response Time to vs Charge Current Battery Shutdown Current DCIN Short to Ground
600 25 DC1256-CLASS V PFET V 500 BAT = 5V APPLICATION GS = 0V GS (1V/DIV) 20 DCIN = 0V BAT = 12V 400 IDCIN, REVERSE 15 (5A/DIV) CLP = 15V LTC4012, 300 RSENSE = 33mΩ ALL PINS RIN = 3.01k 0A 10 DCIN = 0V 200 LTC4012, TIME (1µs/DIV) 4012 G16 PWM FREQUENCY (kHz) BATTERY CURRENT (µA) BAT PINS DCIN = 20V DCIN = 15V 100 BAT = 14.5V 5 INFET = Si7423DN IOUT = <50mA VOUT = 12.3V 0 0 COUT = 0.27F 0 0.5 1.0 1.5 2.0 2.5 3.0 0 5 10 15 20 25 CHARGE CURRENT (A) BATTERY VOLTAGE (V) 4012 G14 4012 G15 4012fa Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Test Circuits Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
(TA = 25°C unless otherwise noted. L = IHLP-2525 6.8µH) Charge Current Line Regulation Charge Current Load Regulation Input Current Limit
0.5 3.5 3.0 BAT = 6V 0.4 ICHG = 3A RSENSE = 33mΩ 3.0 2.5 I 0.3 RIN = 3.01k IN 2.5 2.0 0.2 ICHG = 1A ICHG = 2A ICHG 0.1 2.0 1.5 0 ICHG = 2A 1.5 1.0 I –0.1 CHG = 1A I 1.0 CURRENT (A) 0.5 2.5A BULK CHARGE CHG = 3A –0.2 2.1A INPUT CURRENT LIMIT CHARGE CURRENT (A) 0.5 0 CHARGE CURRENT ERROR (%) –0.3 DCIN = 20V –0.4 0 RSENSE = 33mΩ –0.5 ICL STATE RIN = 3.01k –0.5 –0.5 –1.0 5 10 15 20 25 11.0 11.4 11.8 12.2 12.6 13.0 0 0.5 1.0 1.5 2.0 2.5 DCIN PIN VOLTAGE (V) BATTERY VOLTAGE (V) SYSTEM LOAD (A) 4012 G08 4012 G09 4012 G10
PWM Soft-Start Gate Drive Non-Overlap PWM Frequency vs Duty Cycle
600 ICHG = 750mA ICHG 2A/DIV /DIV) BGATE 500 ITH 1V/DIV 400 PROG 300 1V/DIV TGATE 200 SHDN EXTERNAL FET DRIVE (1V PWM FREQUENCY (kHz) 5V/DIV CLP = 6V TIME (500µs/DIV) 4012 G11 TIME (80ns/DIV) 4012 G12 100 CLP = 12V CLP = 20V CLP = 25V 0 0 20 40 60 80 100 DUTY CYCLE (%) 4012 G13
PWM Frequency INFET Response Time to vs Charge Current Battery Shutdown Current DCIN Short to Ground
600 25 DC1256-CLASS V PFET V 500 BAT = 5V APPLICATION GS = 0V GS (1V/DIV) 20 DCIN = 0V BAT = 12V 400 IDCIN, REVERSE 15 (5A/DIV) CLP = 15V LTC4012, 300 RSENSE = 33mΩ ALL PINS RIN = 3.01k 0A 10 DCIN = 0V 200 LTC4012, TIME (1µs/DIV) 4012 G16 PWM FREQUENCY (kHz) BATTERY CURRENT (µA) BAT PINS DCIN = 20V DCIN = 15V 100 BAT = 14.5V 5 INFET = Si7423DN IOUT = <50mA VOUT = 12.3V 0 0 COUT = 0.27F 0 0.5 1.0 1.5 2.0 2.5 3.0 0 5 10 15 20 25 CHARGE CURRENT (A) BATTERY VOLTAGE (V) 4012 G14 4012 G15 4012fa Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Test Circuits Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts