Datasheet LTC4001 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 2A Synchronous Buck Li-Ion Charger |
| Pages / Page | 20 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25. C unless otherwise noted). … |
| File Format / Size | PDF / 241 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25. C unless otherwise noted). Oscillator Frequency
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LTC4001
W U TYPICAL PERFOR A CE 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 0.4 0.75 0 –0.25 0.2 0.50 DISSIPATION (W) PERCENT VARIATION (%) –0.50 0 0.25 –0.75 FREQUENCY VARIATION FROM 25 TOTAL APPLICATION CIRCUIT POWER –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) 4001 G01 4001 G02 4001 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 IBAT = 2A 1.2 IN = 5V 1.2 1.0 1.5 1.0 VBAT = 3.2V VBAT = 4V V 0.8 BAT = 3.5V I V 0.8 BAT = 1.5A (V) BAT = 3.7V (A) 1.0 0.6 PROG 0.6 V I BAT DISSIPATION (W) IBAT = 1A 0.4 0.4 0.5 IBAT = 500mA 0.2 0.2 TOTAL APPLICATION CIRCUIT POWER 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) 4001 G04 4001 G05 4001 G06
VFLOAT and Recharge Battery Trickle Charge Current vs VBAT Threshold Voltage vs Temperature
55 4.3 VIN = 5.5V VFLOAT 50 VIN = 5V 4.2 (mA) VIN = 4V VRECHARGE I BAT VIN = 4.5V (VBAT FALLING) 45 4.1 FLOAT AND RECHARGE VOLTAGES (V) 40 4.0 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) 4001 G07 4001 G08 4001f 4
W U TYPICAL PERFOR A CE 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 0.4 0.75 0 –0.25 0.2 0.50 DISSIPATION (W) PERCENT VARIATION (%) –0.50 0 0.25 –0.75 FREQUENCY VARIATION FROM 25 TOTAL APPLICATION CIRCUIT POWER –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) 4001 G01 4001 G02 4001 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 IBAT = 2A 1.2 IN = 5V 1.2 1.0 1.5 1.0 VBAT = 3.2V VBAT = 4V V 0.8 BAT = 3.5V I V 0.8 BAT = 1.5A (V) BAT = 3.7V (A) 1.0 0.6 PROG 0.6 V I BAT DISSIPATION (W) IBAT = 1A 0.4 0.4 0.5 IBAT = 500mA 0.2 0.2 TOTAL APPLICATION CIRCUIT POWER 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) 4001 G04 4001 G05 4001 G06
VFLOAT and Recharge Battery Trickle Charge Current vs VBAT Threshold Voltage vs Temperature
55 4.3 VIN = 5.5V VFLOAT 50 VIN = 5V 4.2 (mA) VIN = 4V VRECHARGE I BAT VIN = 4.5V (VBAT FALLING) 45 4.1 FLOAT AND RECHARGE VOLTAGES (V) 40 4.0 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) 4001 G07 4001 G08 4001f 4
