Datasheet

bq24620
SLUS893A –MARCH 2010– REVISED OCTOBER 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
5 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
VCC rising above SRN, Delay to come out of SLEEP
SLEEP falling powerup deglitch 30 ms
mode
BAT LOWV COMPARATOR
LOWV rising threshold (precharge to
V
LOWV
Measured on VFB pin 0.333 0.35 0.367 V
fast charge)
V
LOWV_HYS
LOWV hysteresis 100 mV
LOWV rising deglitch VFB falling below V
LOWV
25 ms
LOWV falling deglitch VFB rising above V
LOWV
+ V
LOWV_HYS
25 ms
RECHARGE COMPARATOR
Recharge threshold (with respect to
V
RECHG
Measured on VFB pin 110 125 140 mV
V
REG
)
Recharge rising deglitch VFB decreasing below V
RECHG
10 ms
Recharge falling deglitch VFB increasing above V
RECHG
10 ms
BAT OVERVOLTAGE COMPARATOR
V
OV_RISE
Overvoltage rising threshold As percentage of V
FB
108%
V
OV_FALL
Overvoltage falling threshold As percentage of V
FB
105%
INPUT OVERVOLTAGE COMPARATOR (ACOV)
V
ACOV
AC overvoltage rising threshold on VCC 31.04 32 32.96 V
V
ACOV_HYS
AC overvoltage falling hysteresis 1000 mV
AC overvoltage rising deglitch Delay to changing the STAT pins 1 ms
AC overvoltage falling deglitch Delay to changing the STAT pins 1 ms
THERMAL SHUTDOWN COMPARATOR
T
SHUT
Thermal shutdown rising temperature Temperature increasing 145 °C
Thermal shutdown hysteresis 15 °C
T
SHUT_HYS
Thermal shutdown rising deglitch Temperature increasing 100 μs
Thermal shutdown falling deglitch Temperature decreasing 10 ms
THERMISTOR COMPARATOR
V
LTF
Cold temperature rising threshold Charger suspended below this temperature 72.5% 73.5% 74.5%
V
LTF_HYS
Cold temperature hysteresis 0.2% 0.4% 0.6%
Charger enabled, cuts back to I
CHARGE
/8 below this
V
COOL
Cool temperature rising threshold 70.2% 70.7% 71.2%
temperature
V
COOL_HYS
Cool temperature hysteresis 0.2% 0.6% 1.0%
Charger cuts back to I
CHARGE
/8 above this
V
WARM
Warm temperature rising threshold 47.5% 48% 48.5%
temperature
V
WARM_HYS
Warm temperature hysteresis 1.0% 1.2% 1.4%
Charger suspended above this temperature before
V
HTF
Hot temperature rising threshold 36.2% 37% 37.8%
initiating charge
Charger suspended above this temperature during
V
TCO
Cutoff temperature rising threshold 33.7% 34.4% 35.1%
initiating charge
Deglitch time for temperature
V
TS
> V
LTF
, or V
TS
< V
TCO
, or V
TS
< V
HTF
400 ms
out-of-range detection
Deglitch time for temperature
V
TS
< V
LTF
– V
LTF_HYS
or V
TS
>V
TCO
, or V
TS
> V
HTF
20 ms
in-valid-range detection
Deglitch time for current reduction to
I
CHARGE
/8 due to warm or cool V
TS
> V
COOL
, or V
TS
< V
WARM
25 ms
temperature
Deglitch time to charge at I
CHARGE
from
V
TS
< V
COOL
- V
COOL_HYS
, or V
TS
> V
WARM
-
I
CHARGE
/8 when resuming from warm or 25 ms
V
WARM_HYS
cool temperatures
Charge current due to warm or cool V
COOL
< V
TS
< V
LTF
, or V
WARM
< V
TS
< V
HTF
, or
I
CHARGE
/8
temperatures V
WARM
< V
TS
< V
TCO
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