Datasheet LTC1960 (Analog Devices) - 6

LTC1960
TYPICAL PERFORMANCE CHARACTERISTICS Battery Drain Current PowerPath Autonomous (BAT1 Selected) PowerPath Switching Switching
250 16 16 TA = 25°C CLOAD = 20µF 240 15 ILOAD = 0.8A 15 230 T 14 A = 25°C 14 220 13 13 210 12 12 200 TAGE (V) 11 11 190 10 10 T1 CURRENT (µA) BAT1 BA 180 LOAD VOL 9 LOPWR LOAD VOLTAGE (V) 9 REMOVED 170 8 THRESHOLD 8 160 7 7 NOTE: LIGHT LOAD TO EXAGGERATE SWITCHING EVENT 150 6 6 6 12 18 24 30 –50 –40 –30 –20 –10 0 10 20 30 40 50 –1 0 1 2 3 4 5 BAT1 VOLTAGE (V) TIME (µs) TIME (SEC) 1960 G01 1960 G02 1960 G03
Charger Efficiency Charger Start-Up Charger Load Dump
100 12 14 BAT1 90 OUTPUT 12 80 10 VIN = 20V VDAC = 12.29V 70 10 8 IDAC = 3000mA 60 LOAD CURRENT = 1A 8 TA = 25°C 50 6 40 6 LOAD EFFICIENCY (%) 30 4 BAT1 VOLTAGE (V) CONNECTED CHARGER OUTPUT (V) 4 20 2 2 LOAD 10 DISCONNECTED 0 0 0 0 0.025 0.10 0.50 2.5 4.0 –0.05 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 –4 –2 0 2 4 6 8 10 12 14 16 IOUT (A) TIME (SEC) TIME (ms) 1960 G04 1960 G05 1960 G06
IDAC Low Current Mode Charger Load Regulation Charging Current Accuracy vs Normal Mode
12.4 120 500 VDCIN = 20V VIN = 20V 12.3 450 100 VBAT1 = 12V VBAT1 = 12V RSNS = 0.025Ω 400 RSNS = 0.025Ω 12.2 80 TA = 25°C TA = 25°C 350 12.1 60 300 LOW CURRENT 12.0 40 250 MODE 11.9 200 20 BAT1 VOLTAGE (V) 150 NORMAL 11.8 V MODE IN = 20V 0 CHARGING CURRENT (mA) VDAC = 12.288V 100 OUTPUT CURRENT ERROR (mA) 11.7 IDAC = 4000mA –20 50 TA = 25°C 11.6 –40 0 0 1000 2000 3000 4000 0 200 400 600 800 1000 1200 0 80 160 240 320 400 480 560 CHARGE CURRENT (mA) IDAC VALUE PROGRAMMED CURRENT (mA) 1960 G07 1960 G08 1960 G09 Rev. C 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Timing Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts