BQ24618 Datasheet, PDF (7/36 Pages) Texas Instruments – Stand-Alone USB-Friendly Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger

bq24618
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SLUSA55 – OCTOBER 2010
ELECTRICAL CHARACTERISTICS (continued)
4.7V ≤ V(VCC) ≤ 28V, 0°C < T_J < +125°C, typical values are at T_A = 25°C, with respect to GND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
BAT OVER-VOLTAGE COMPARATOR
V_{OV_RISE}
Over-voltage rising threshold
V_{OV_FALL}
Over-voltage falling threshold
INPUT OVER-VOLTAGE COMPARATOR (ACOV)
As percentage of V_FB
As percentage of V_FB
104%
102%
V_ACOV
AC over-voltage rising threshold on
VCC
31.04
32 32.96
V
V_{ACOV_HYS}
AC over-voltage falling hysteresis
AC over-voltage deglitch (both edge)
Delay to changing the STAT pins
1
V
1
ms
AC over-voltage rising deglitch
Delay to disable charge
1
ms
AC over-voltage falling deglitch
Delay to resume charge
20
ms
THERMAL SHUTDOWN COMPARATOR
T_SHUT
T_{SHUT_HYS}
Thermal shutdown rising temperature
Thermal shutdown hysteresis
Thermal shutdown rising deglitch
Temperature increasing
Temperature increasing
145
°C
15
°C
100
ms
Thermal shutdown falling deglitch
Temperature decreasing
10
ms
THERMISTOR COMPARATOR
V_LTF
V_{LTF_HYS}
V_HTF
V_TCO
Cold temperature rising threshold
Rising hysteresis
Hot temperature rising threshold
Cut-off temperature rising threshold
Deglitch time for temperature out of
range detection
As Percentage to V_VREF
As Percentage to V_VREF
As Percentage to V_VREF
As Percentage to V_VREF
V_TS > V_LTF, or V_TS < V_TCO, or V_TS < V_HTF
72.5%
0.2%
36.2%
33.7%
73.5%
0.4%
37%
34.4%
74.5%
0.6%
37.8%
35.1%
400
ms
Deglitch time for temperature in valid
range detection
V_TS < V_LTF – V_{LTF_HYS} or V_TS >V_TCO, or V_TS > V_HTF
20
ms
CHARGE OVER-CURRENT COMPARATOR (CYCLE-BY-CYCLE)
Charge over-current falling threshold
Current rising, in non-synchronous mode, measure on
V_(SRP-SRN), V_SRP < 2 V
45.5
mV
Current rising, as percentage of V_{(IREG_CHG)}, in
V_OC
Charge over-current threshold floor
synchronous mode, V_SRP > 2.2V
Minimum OCP threshold in synchronous mode,
measure on V_(SRP-SRN), V_SRP > 2.2V
160%
50
mV
Charge over-current threshold ceiling
Maximum OCP threshold in synchronous mode,
measure on V_(SRP-SRN), V_SRP > 2.2V
180
mV
CHARGE UNDER-CURRENT COMPARATOR (CYCLE-BY-CYCLE)
V_ISYNSET
Charge under-current falling threshold
BATTERY SHORTED COMPARATOR (BATSHORT)
Switch from SYNCH to NON-SYNCH, V_SRP > 2.2V
1
5
9 mV
V_BATSHT
BAT Short falling threshold, forced
non-syn mode
V_SRP falling
2
V
V_{BATSHT_HYS}
BAT short rising hysteresis
V_{BATSHT_DEG}
Deglitch on both edge
LOW CHARGE CURRENT COMPARATOR
200
mV
1
ms
Low charge current (average) falling
V_LC
threshold to force into non-synchronous Measure on V_(SRP-SRN)
mode
1.25
mV
V_{LC_HYS}
Low charge current rising hysteresis
V_{LC_DEG}
Deglitch on both edge
VREF REGULATOR
1.25
mV
1
ms
V_{VREF_REG}
I_{VREF_LIM}
VREF regulator voltage
VREF current limit
V_VCC > V_UVLO, (0-35mA load)
V_VREF = 0V, V_VCC > V_UVLO
3.267
35
3.3 3.333
V
mA
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