Datasheet

bq24620
www.ti.com SLUS893A –MARCH 2010– REVISED OCTOBER 2011
ELECTRICAL CHARACTERISTICS
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
OPERATING CONDITIONS
V
VCC_OP
VCC input voltage operating range 5 28 V
QUIESCENT CURRENTS
Total battery discharge current (sum of
I
BAT
currents into VCC, BTST, PH, SRP, V
VCC
< V
SRN
, V
VCC
> V
UVLO
(SLEEP) 15 μA
SRN, VFB), VFB ≤ 2.1 V
V
VCC
> V
SRN
, V
VCC
> V
UVLO
CE = LOW (IC quiescent
1 1.5
current)
Adapter supply current (current into V
VCC
> V
SRN
, V
VCC
>V
VCCLOW
, CE = HIGH, charge
I
AC
2 5 mA
VCC pin) done
V
VCC
> V
SRN
, V
VCC
>V
VCCLOW
, CE = HIGH, Charging,
12
Qg_total = 20 nC, V
VCC
= 20 V
CHARGE VOLTAGE REGULATION
V
FB
Feedback regulation voltage 1.8 V
T
J
= 0°C to 85°C –0.5% 0.5%
Charge voltage regulation accuracy
T
J
= –40°C to 125°C –0.7% 0.7%
I
VFB
Input leakage current into VFB pin VFB = 1.8 V 100 nA
CURRENT REGULATION – FAST CHARGE
V
ISET
ISET voltage range 0 2 V
V
IREG_CHG
SRP–SRN current-sense voltage range V
IREG_CHG
= V
SRP
– V
SRN
0 100 mV
Charger current-set factor; amps of
K
ISET
R
SENSE
= 10 mΩ 5 A/V
charge current per volt on ISET pin)
V
IREG_CHG
= 40 mV –3% 3%
V
IREG_CHG
= 20 mV –4% 4%
Charge-current regulation accuracy
V
IREG_CHG
= 5 mV –25% 25%
V
IREG_CHG
= 1.5 mV (V
SRN
> 3.1V) –40% 40%
I
ISET
Leakage current in to ISET Pin V
ISET
= 2 V 100 nA
CURRENT REGULATION – PRECHARGE
Precharge current R
SENSE
= 10 mΩ, VFB < V
LOWV
50 125 200 mA
CHARGE TERMINATION
Termination current range R
SENSE
= 10 mΩ I
CHARGE
/10 A
Termination current-set factor; amps of
K
TERM
0.5 A/V
termination current per volt on ISET pin
V
ITERM
= 10 mV –10% 10%
Termination current accuracy V
ITERM
= 5 mV –25% 25%
V
ITERM
= 1.5 mV –45% 45%
Deglitch time for termination (both
100 ms
edge)
t
QUAL
Termination qualification time V
BAT
> V
RECH
and I
CHARGE
< I
TERM
250 ms
I
QUAL
Termination qualification time Discharge current once termination is detected 2 mA
INPUT UNDERVOLTAGE LOCKOUT COMPARATOR (UVLO)
V
UVLO
AC undervoltage rising threshold Measure on VCC 3.65 3.85 4 V
V
UVLO_HYS
AC undervoltage hysteresis, falling 350 mV
VCC LOWV COMPARATOR
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
SLEEP falling threshold V
VCC
– V
SRN
to enter SLEEP 40 100 150 mV
V
SLEEP_HYS
SLEEP hysteresis 500 mV
SLEEP rising delay VCC falling below SRN, delay to pull up PG 1 µs
SLEEP falling delay VCC rising above SRN, delay to pull down PG 30 ms
SLEEP rising shutdown deglitch VCC falling below SRN, Delay to enter SLEEP mode 100 ms
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