Datasheet LTC1960 (Analog Devices) - 7

LTC1960
TYPICAL PERFORMANCE CHARACTERISTICS Dual Charging Batteries with Voltage Accuracy Dual vs Sequential Charging Different Charge State
100 3500 17.0 3500 DCIN = 24V BAT2 3000 BAT1 BAT2 VOLTAGE 75 TA = 25°C 2500 CURRENT CURRENT 16.5 3000 I BAT1 LOAD = 100mA 2000
SEQUENTIAL
VOLTAGE BATTERY CURRENT (mA) 50 1500 16.0 2500 1000 25 500 15.5 2000 0 0 3500 BAT1 15.0 1500 –25 3000 BAT1 2500 CURRENT BAT2 CURRENT 14.5 1000 –50 BATTERY CURRENT (mA) 2000 CURRENT
DUAL
BATTERY VOLTAGE (V) OUTPUT VOLTAGE ERROR (mV) 1500 BAT2 –75 1000 14.0 500 CURRENT 500 100 MINUTES –100 0 13.5 0 250 450 650 850 1050 1250 1450 0 50 100 150 200 250 300 0 20 40 60 80 100 120 140 160 VDAC VALUE TIME (MINUTES) TIME (MINUTES) 1960 G10 BATTERY TYPE: 10.8V Li-Ion (MOLTECH NI2020) BAT1 INITIAL CAPACITY = 0% REQUESTED CURRENT = 3A BAT2 INITIAL CAPACITY = 90% REQUESTED VOLTAGE = 12.3V PROGRAMMED CHARGER CURRENT = 3A MAX CHARGER CURRENT = 4.1A 1960 G11 PROGRAMMED CHARGER VOLTAGE = 16.8V 1960 G12
Dual vs Sequential Discharge Dual vs Sequential Discharge
15 12.0 BAT1 14 VOLTAGE
DUAL
11.0 BAT2 13 VOLTAGE
DUAL
BAT2 10.0 VOLTAGE 12 BAT1 9.0 11 VOLTAGE 8.0 BAT2 10 VOLTAGE
SEQUENTIAL
BAT2 15 12.0 VOLTAGE
SEQUENTIAL
14 11.0 BATTERY VOLTAGE (V) BATTERY VOLTAGE (V) 13 BAT1 10.0 BAT1 VOLTAGE 12 VOLTAGE 9.0 11 11 16 MINUTES MINUTES 8.0 10 0 20 40 60 80 100 120 140 160 180 0 20 40 60 80 100 120 140 TIME (MINUTES) TIME (MINUTES) BATTERY TYPE: 10.8V Li-Ion(MOLTECH NI2020) BATTERY TYPE: 12V NIMH (MOLTECH NJ1020) LOAD CURRENT = 3A 1960 G14 1960 G13 LOAD: 33W Rev. C For more information www.analog.com 7 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