Datasheet LTC4110 (Analog Devices) - 7

LTC4110
TYPICAL PERFORMANCE CHARACTERISTICS Output Charging Characteristics Typical CHGFET and DCHFET Showing Constant Current and Supply Current vs DCIN Voltage in Waveforms Constant Voltage Operation Idle Mode
1200 2.5 CC 1000 2.0 800 5V/DIV 1.5 (mA) 600 (mA) T I BA I DCIN 1.0 CV 400 0V PRE-CHARGE 0.5 4110 G01 500ns/DIV 200 VIN = 12V VBAT = 12V (NiMH) 0 0 0 2 4 6 8 10 12 14 0 5 10 15 20 VBAT (V) DCIN (V) 4110 G02 4110 G03
Battery Leakage in Idle Battery Current in Backup Battery Leakage in Shutdown Mode – IBIDL Mode – IBBU Mode vs Battery Voltage
140 1.8 40 120 1.6 35 1.4 100 30 1.2 80 25 1.0 (μA) 60 (mA) (μA) T T T 20 I BA 0.8 I BA I BA 40 15 0.6 20 10 0.4 0 5 0.2 –20 0 0 0 5 10 15 20 25 0 5 10 15 20 25 0 5 10 15 20 25 V VBAT (V) V BAT (V) BAT (V) 4110 G04 4110 G05 4110 G06
Charging Effi ciency/Power Loss, 12VIN and 12.6VOUT (Xfmr = BH Backup Mode On and Off 510-1019) Soft-Start Waveform Waveform
100 2.5 VBACKUP 90 2V/DIV 80 2.0 EFFICIENCY 70 POWER LOSS (W) VBATTERY 60 1.5 0.2A/DIV 3V/DIV 50 40 1.0 EFFICIENCY (%) POWER LOSS 30 0A 20 0.5 0V 4110 G08 4110 G09 2ms/DIV 10ms/DIV 10 NiMH BATTERY (12V) 0 0 ILOAD = 3A 0.05 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.00 VIN = 15V FALLING ILOAD (A) 4110 G07 4110fb 7