BQ24630 Datasheet, PDF (5/33 Pages) Texas Instruments – Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger with System Power Selector and Low Iq

bq24630
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SLUS894 – JANUARY 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
VCC LOWV COMPARATOR
Falling threshold, disable charge
Measure on VCC
4.1
Rising threshold, resume charge
4.35
4.5
SLEEP COMPARATOR (REVERSE DISCHARGING PROTECTION)
V_{SLEEP _FALL}
V_{SLEEP_HYS}
SLEEP falling threshold
SLEEP hysteresis
SLEEP rising delay
V_VCC – V_SRN to enter SLEEP
VCC falling below SRN, Delay to turn off ACFET
40
100
150
500
1
SLEEP falling delay
VCC rising above SRN, Delay to turn on ACFET
30
SLEEP rising shutdown deglitch
VCC falling below SRN, Delay to enter SLEEP mode
100
SLEEP falling powerup deglitch
VCC rising above SRN, Delay to exit out of SLEEP mode
30
ACN / SRN COMPARATOR
V_{ACN-SRN_FALL}
V_{ACN-SRN_HYS}
ACN to SRN falling threshold
ACN to SRN rising hysteresis
ACN to SRN rising deglitch
ACN to SRN falling deglitch
BAT LOWV COMPARATOR
V_ACN–V_SRN to turn on BATFET
V_ACN – V_SRN > V_{ACN-SRN_RISE}
V_ACN – V_SRN < V_{ACN-SRN_FALL}
100
200
310
100
2
50
V_LOWV
Precharge to fastcharge transition (LOWV
threshold)
Measured on VFB pin, rising
0.333 0.35 0.367
V_{LOWV_HYS}
LOWV hysteresis
100
LOWV rising deglitch
VFB falling below VLOWV
25
LOWV falling deglitch
VFB rising above VLOWV
25
RECHARGE COMPARATOR
V_RECHG
Recharge threshold (with respect to
VREG)
Measured on VFB pin, rising
110
125
140
Recharge rising deglitch
VFB decreasing below V_RECHG
10
Recharge falling deglitch
VFB increasing above V_RECHG
10
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
108%
105%
V_ACOV
V_{ACOV_HYS}
AC over-voltage rising threshold on VCC
AC over-voltage falling hysteresis
AC over-voltage deglitch (both edge)
Delay to changing the STAT pins
31.04
32 32.96
1
1
AC over-voltage rising deglitch
Delay to disable charge
1
AC over-voltage falling deglitch
Delay to resume charge
20
THERMAL SHUTDOWN COMPARATOR
T_SHUT
Thermal shutdown rising temperature
Temperature increasing
145
T_{SHUT_HYS}
Thermal shutdown hysteresis
15
Thermal shutdown rising deglitch
Temperature increasing
100
Thermal shutdown falling deglitch
Temperature decreasing
10
THERMISTOR COMPARATOR
V_LTF
V_{LTF_HYS}
V_COOL
Cold temperature rising threshold
Cold temperature hysteresis
Cool Temperature rising threshold
Charger suspended below this temperature
Charger enabled, cuts back to I_CHARGE/8 below this
temperature
72.5% 73.5% 74.5%
0.2% 0.4% 0.6%
70.2% 70.7% 71.2%
V_{COOL_HYS}
V_WARM
V_{WARM_HYS}
V_HTF
Cool temperature hysteresis
Warm temperature rising threshold
Warm temperature hysteresis
Hot temperature rising threshold
Charger cuts back to I_CHARGE/8 above this temperature
Charger suspended above this temperature before
initiating charge
0.2%
47.5%
1.0%
36.2%
0.6%
48%
1.2%
1.0%
48.5%
1.4%
37% 37.8%
V_TCO
Cut-off temperature rising threshold
Charger suspended above this temperature during
initiating charge
33.7% 34.4% 35.1%
UNIT
V
V
mV
mV
ms
ms
ms
ms
mV
mV
ms
ms
V
mV
ms
ms
mV
ms
ms
V
V
ms
ms
ms
°C
°C
ms
ms
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