Datasheet LTC4001-1 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 2A Synchronous Buck Li-Ion Charger |
| Pages / Page | 20 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). … |
| File Format / Size | PDF / 236 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). Oscillator Frequency
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LTC4001-1
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Oscillator Frequency Dissipation of Figure 8 Circuit Oscillator Frequency vs VIN vs Temperature vs IBAT
1.00 0.8 1.25 VBAT = 3.2V VIN = 5V VIN = 5V 0.75 VSS = 1V VBAT = 3.2V VBAT = 4V °C (%) V 0.6 SS = 1V 1.00 0.50 0.25 TION (%) 0.4 0.75 ARIA 0 TION FROM 25 TION (W) A TION CIRCUIT POWER –0.25 ARIA 0.2 0.50 DISSIP PERCENT V –0.50 0 AL APPLICA 0.25 –0.75 FREQUENCY V TOT –1.00 –0.2 0 3 3.5 4 4.5 5 5.5 6 –50 –30 –10 10 30 50 70 90 110 130 150 500 1000 1500 2000 VIN (V) TEMPERATURE (°C) IBAT (mA) 40011 G01 40011 G02 40011 G03
Output Charging Characteristic Dissipation of Figure 8 Circuit PROG Pin Characteristic Showing Constant Current and vs VIN (VPROG vs IPROG) Constant Voltage Operation
1.4 2.0 V V BAT = 4V I IN = 5V BAT = 2A 1.2 1.2 1.0 1.5 1.0 VBAT = 3.2V VBAT = 4V V 0.8 BAT = 3.5V 0.8 IBAT = 1.5A V (V) BAT = 3.7V TION (W) (A) A T 1.0 TION CIRCUIT POWER 0.6 0.6 PROGV I BA DISSIP IBAT = 1A 0.4 0.4 0.5 AL APPLICA IBAT = 500mA 0.2 0.2 TOT 0 0 0 4.25 4.5 4.75 5 5.25 5.5 0 5 10 15 20 0 0.5 1 1.5 2 2.5 3 3.5 4 VIN (V) IPROG (mA) VBAT (V) 40011 G04 40011 G05 40011 G06
VFLOAT and Recharge Battery Trickle Charge Current vs VBAT Threshold Voltage vs Temperature
55 4.2 VIN = 5.5V V TAGES (V) FLOAT 50 VIN = 5V 4.1 (mA) T VIN = 4V VRECHARGE I BA VIN = 4.5V (VBAT FALLING) 45 4.0 T AND RECHARGE VOL FLOA 40 3.9 0 0.5 1 1.5 2 2.5 3 –50 –30 –10 10 30 50 70 90 110 130 150 VBAT (V) TEMPERATURE (°C) 40011 G07 40011 G08 40011fa 4
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Oscillator Frequency Dissipation of Figure 8 Circuit Oscillator Frequency vs VIN vs Temperature vs IBAT
1.00 0.8 1.25 VBAT = 3.2V VIN = 5V VIN = 5V 0.75 VSS = 1V VBAT = 3.2V VBAT = 4V °C (%) V 0.6 SS = 1V 1.00 0.50 0.25 TION (%) 0.4 0.75 ARIA 0 TION FROM 25 TION (W) A TION CIRCUIT POWER –0.25 ARIA 0.2 0.50 DISSIP PERCENT V –0.50 0 AL APPLICA 0.25 –0.75 FREQUENCY V TOT –1.00 –0.2 0 3 3.5 4 4.5 5 5.5 6 –50 –30 –10 10 30 50 70 90 110 130 150 500 1000 1500 2000 VIN (V) TEMPERATURE (°C) IBAT (mA) 40011 G01 40011 G02 40011 G03
Output Charging Characteristic Dissipation of Figure 8 Circuit PROG Pin Characteristic Showing Constant Current and vs VIN (VPROG vs IPROG) Constant Voltage Operation
1.4 2.0 V V BAT = 4V I IN = 5V BAT = 2A 1.2 1.2 1.0 1.5 1.0 VBAT = 3.2V VBAT = 4V V 0.8 BAT = 3.5V 0.8 IBAT = 1.5A V (V) BAT = 3.7V TION (W) (A) A T 1.0 TION CIRCUIT POWER 0.6 0.6 PROGV I BA DISSIP IBAT = 1A 0.4 0.4 0.5 AL APPLICA IBAT = 500mA 0.2 0.2 TOT 0 0 0 4.25 4.5 4.75 5 5.25 5.5 0 5 10 15 20 0 0.5 1 1.5 2 2.5 3 3.5 4 VIN (V) IPROG (mA) VBAT (V) 40011 G04 40011 G05 40011 G06
VFLOAT and Recharge Battery Trickle Charge Current vs VBAT Threshold Voltage vs Temperature
55 4.2 VIN = 5.5V V TAGES (V) FLOAT 50 VIN = 5V 4.1 (mA) T VIN = 4V VRECHARGE I BA VIN = 4.5V (VBAT FALLING) 45 4.0 T AND RECHARGE VOL FLOA 40 3.9 0 0.5 1 1.5 2 2.5 3 –50 –30 –10 10 30 50 70 90 110 130 150 VBAT (V) TEMPERATURE (°C) 40011 G07 40011 G08 40011fa 4
