BQ24618_15 Datasheet, PDF (9/43 Pages) Texas Instruments – System Power Selector and Low

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bq24618
SLUSA55B – OCTOBER 2010 – REVISED APRIL 2015
Electrical Characteristics (continued)
4.7 V ≤ V_VCC ≤ 28 V, 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
I_ACSET
Input current regulation accuracy
leakage current into ACSET pin
V_{IREG_DPM} = 40 mV
V_{IREG_DPM} = 20 mV
V_{IREG_DPM} = 5 mV
I_ISET1
Leakage current into ACSET pin
V_ACSET = 2 V
INPUT UNDERVOLTAGE LOCKOUT COMPARATOR (UVLO)
–3%
–4%
–25%
3%
4%
25%
100 nA
V_UVLO
AC undervoltage rising threshold
V_{UVLO_HYS}
AC undervoltage hysteresis, falling
VCC LOWV COMPARATOR
Measure on VCC
3.65 3.85
350
4
V
mV
Falling threshold, disable charge
Measure on VCC
4.1
V
Rising threshold, resume charge
4.35
4.5
V
SLEEP COMPARATOR (REVERSE DISCHARGING PROTECTION)
V_{SLEEP _FALL}
V_{SLEEP_HYS}
SLEEP falling threshold
SLEEP rising threshold
SLEEP rising delay
V_VCC – V_SRN to enter SLEEP
VCC falling below SRN, delay to turn off ACFET
40
100
150 mV
600 mV
1
μs
SLEEP falling delay
VCC rising above SRN, delay to turn on ACFET
30
μs
SLEEP rising shutdown deglitch
VCC falling below SRN, delay to enter SLEEP mode
100
ms
SLEEP falling power up deglitch
VCC rising above SRN, delay to exit SLEEP mode
30
ms
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 mV
100
mV
2
ms
50
μs
V_LOWV
Precharge to fast charge transition
(LOWV threshold)
Measured on VFB pin, Rising
1.534 1.55 1.566
V
V_{LOWV_HYS}
LOWV hysteresis
LOWV rising deglitch
LOWV falling deglitch
RECHARGE COMPARATOR
VFB falling below V_LOWV
VFB rising above V_LOWV + V_{LOWV_HYS}
100
mV
25
ms
25
ms
V_RECHG
Recharge threshold (with respect to
V_REG)
Recharge rising deglitch
Recharge falling deglitch
BAT OVERVOLTAGE COMPARATOR
Measured on VFB pin, falling
VFB decreasing below V_RECHG
VFB decreasing above V_RECHG
35
50
65 mV
10
ms
10
ms
V_{OV_RISE}
Overvoltage rising threshold
V_{OV_FALL}
Overvoltage falling threshold
INPUT OVERVOLTAGE COMPARATOR (ACOV)
As percentage of V_FB
As percentage of V_FB
104%
102%
V_ACOV
V_{ACOV_HYS}
AC overvoltage rising threshold on VCC
AC overvoltage falling hysteresis
AC overvoltage deglitch (both edge)
Delay to changing the STAT pins
31.04
32 32.96
V
1
V
1
ms
AC overvoltage rising deglitch
Delay to disable charge
1
ms
AC overvoltage 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
μs
Thermal shutdown falling deglitch
Temperature decreasing
10
ms
THERMISTOR COMPARATOR
V_LTF
V_{LTF_HYS}
V_HTF
Cold temperature rising threshold
Rising hysteresis
Hot temperature rising threshold
As percentage of V_VREF
As percentage of V_VREF
As percentage of V_VREF
72.5%
0.2%
36.2%
73.5%
0.4%
37%
74.5%
0.6%
37.8%
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