BQ24600_1 Datasheet, PDF (5/31 Pages) Texas Instruments – Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with Low Iq

bq24600
www.ti.com
SLUS891 – FEBRUARY 2010
ELECTRICAL CHARACTERISTICS (continued)
5.0V ≤ 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
RECHARGE COMPARATOR
V_RECHG
Recharge threshold (with respect
to.V_REG)
Recharge rising deglitch
Recharge falling deglitch
BAT OVER-VOLTAGE COMPARATOR
Measured on VFB pin
VFB decreasing below V_RECHG
VFB increasing above V_RECHG
35
50
10
10
65 mV
ms
ms
V_{OV_RISE}
Over-Voltage Rising Threshold
V_{OV_FALL}
Over-Voltage Falling Threshold
INPUT OVER-VOLTAGE COMPARATOR (ACOV)
As percentage of VFB
As percentage of VFB
104%
102%
V_ACOV
AC over-voltage rising threshold on
VCC
31.04
32
32.96 V
V_{ACOV_HYS}
V_{ACOV_HYS}
AC over-voltage falling hysteresis
AC over-voltage rising deglitch
AC over-voltage falling deglitch
1
V
1
ms
1
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%
400
74.5%
0.6%
37.8%
35.1%
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)
Current rising, in non-synchronous mode, mesure on
Charge over-current falling threshold
V_(SRP-SRN), V_SRP < 2 V
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
Charge over-current threshold ceiling
Maximum OCP threshold in synchronous mode, measure
on V_(SRP-SRN), V_SRP > 2.2V
CHARGE UNDER-CURRENT COMPARATOR (CYCLE-BY-CYCLE)
45.5
mV
160%
50
mV
180
mV
V_ISYNSET
Charge under-current falling threshold
BATTERY SHORTED COMPARATOR (BATSHORT)
V_SRP>2.2V, Switch from CCM to DCM
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
V_LC
Low charge current (average) falling
threshold to force into non-sync mode
Measure V_(SRP-SRN)
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 = 0 V, V_VCC > V_UVLO
3.267
35
3.3
3.333 V
mA
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