Datasheet LTC4006 (Analog Devices) - 5

LTC4006
W U TYPICAL PERFOR A CE CHARACTERISTICS Disconnect/Reconnect Battery Battery Leakage Current vs (Load Dump) Battery Voltage
40 VDCIN = 0V 3A STEP 35 µA) 30 1A STEP 1A STEP VFLOAT 25 1V/(DIV) 20 15 3A STEP LOAD 10 STATE DISCONNECT RECONNECT BATTERY LEAKAGE CURRENT ( 5 0 LOAD CURRENT = 1A, 2A, 3A 0 5 10 15 20 25 30 DCIN = 20V BATTERY VOLTAGE (V) LTC4006-2 4006 G05 4006 G04
LTC4006-2 Efficiency with Efficiency at 19VDC VIN 15VDC VIN
100 100 LTC4006-4 95 95 LTC4006-2 ) % % 90 90 85 85 EFFICIENCY ( EFFICIENCY ( 80 80 75 75 0.50 1.00 1.50 2.00 2.50 3.00 0.50 1.00 1.50 2.00 2.50 3.00 CHARGING CURRENT (A) CHARGING CURRENT (A) 4006 G07 4006 G08
U U U PI FU CTIO S DCIN (Pin 1):
External DC Power Source Input. Bypass nected and the CHG pin is forced into a high impedance this pin with at least 0.01µF. See Applications Information state. A pull-up resistor is required. The timer function is section. defeated by forcing this pin below 1V (or connecting it to GND).
CHG (Pin 2):
Open-Drain Charge Status Output. When the battery is being charged, the CHG pin is pulled low by an
ACP/SHDN (Pin 3):
Open-Drain Output used to indicate if internal N-channel MOSFET. When the charge current the AC adapter voltage is adequate for charging. Active drops below 10% of programmed current, the N-channel high digital output. Internal 10µA pull-up to 3.5V. The MOSFET turns off and a 25µA current source is connected charger can also be inhibited by pulling this pin below 1V. from the CHG pin to GND. When the timer runs out or the Reset the charger by pulsing the pin low for a minimum of input supply is removed, the current source will be discon- 0.1µs. 4006fa 5