Datasheet

ADP2291
Rev. A | Page 3 of 20
SPECIFICATIONS
V
IN
= 5.5 V, V
BAT
= 4.2 V, R
ADJ
open, T
A
= –40°C to +85°C, typical values are at 25°C, unless otherwise noted.
1
Table 1.
Parameter Conditions Min Typ Max Unit
POWER SUPPLY, IN
Input Voltage 4.5 12 V
Current Draw
Fast charge/precharge/end-of-charge modes
Timeout/shutdown/battery fault
6
1.4
9
1.8
mA
mA
BATTERY VOLTAGE, BAT
Voltage Accuracy, End-of-Charge (V
BAT, EOC
)
T
A
= 0°C to +50°C
V
IN
= 4.5 V to 12 V
V
IN
– V
CS
= VRS/10
4.158 4.2 4.242 V
Load Regulation, No Battery V
IN
– V
CS
= 0 to VRS −80 mV
Current Draw Timeout mode, V
IN
= 4.5 V to 12 V 45 µA
Current Draw Battery fault/shutdown mode, V
IN
= 4.5 V to 12 V 0.1 1 µA
Reverse Leakage Current Power-down mode: V
IN
= float, V
BAT
= 4.2 V 0.1 µA
FAST CHARGE MODE
Sense Voltage Setpoint (VRS)
V
IN
– V
CS
, R
ADJ
= open
V
IN
= 4.5 V to 12 V
V
BAT
= 3.6 V
140 150 160 mV
Sense Voltage Setpoint (VRS)
V
IN
– V
CS
, R
ADJ
= 100 kΩ
V
IN
= 4.5 V to 12 V
V
BAT
= 3.6 V
40 50 60 mV
Current Regulation Adjustment Per V of (3 V – V
ADJ
) 67 mV/V
PRECHARGE MODE
Sense Voltage Setpoint (VRS)
V
IN
– V
CS,
R
ADJ
= open
V
IN
= 4.5 V to 12 V
V
BAT
= 2 V
10 15 20 mV
Sense Voltage Setpoint (VRS)
V
IN
– V
CS
, R
ADJ
= 100 kΩ
V
IN
= 4.5 V to 12 V
V
BAT
= 2 V
5 10 15 mV
BAT Precharge Threshold V
BAT
rising 2.65 2.85 V
Hysteresis 70 mV
SHUTDOWN MODE
ADJ Shutdown Threshold V
ADJ
falling, V
IN
= 4.5 V 0.30 0.45 V
Hysteresis 40 mV
Pull-Up Current from ADJ V
ADJ
= 0 40 µA
POWER-DOWN MODE
V
IN
Power-Down Threshold V
IN
rising 3.6 4 V
Hysteresis 220 mV
V
IN
_Good Comparator
Threshold (V
IN
> V
BAT
) V
IN
rising 125 170 220 mV
Hysteresis 110 mV
EOC COMPARATOR
Current Threshold V
IN
– V
CS
falling, R
ADJ
= open, relative to VRS 7 10 13 %
Current Threshold V
IN
– V
CS
falling, R
ADJ
= 100 kΩ, relative to VRS 6 10 16 %
Hysteresis 12 mV
RESTART COMPARATOR
BAT Restart Threshold V
IN
> 4.5 V, V
BAT
falling, relative to V
BAT, EOC
−170 mV