Datasheet

bq24616
SLUSA49B –APRIL 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
CHARGE UNDERCURRENT COMPARATOR (CYCLE-BY-CYCLE)
V
ISYNSET
Charge undercurrent falling threshold Switch from SYNCH to NON-SYNCH, V
SRP
> 2.2 V 1 5 9 mV
BATTERY SHORTED COMPARATOR (BATSHORT)
BAT short falling threshold, forced
V
BATSHT
V
SRP
falling 2 V
non-syn mode
V
BATSHT_HYS
BAT short rising hysteresis 200 mV
V
BATSHT_DEG
Deglitch on both edges 1 μs
LOW CHARGE CURRENT COMPARATOR
Low charge current (average) falling
V
LC
threshold to force into non-synchronous Measure on V
(SRP-SRN)
1.25 mV
mode
V
LC_HYS
Low charge current, rising hysteresis 1.25 mV
V
LC_DEG
Deglitch on both edge 1 μs
VREF REGULATOR
V
VREF_REG
VREF regulator voltage V
VCC
> V
UVLO
, (0–35 mA load) 3.267 3.3 3.333 V
I
VREF_LIM
VREF current limit V
VREF
= 0 V, V
VCC
> V
UVLO
35 mA
REGN REGULATOR
V
REGN_REG
REGN regulator voltage V
VCC
> 10 V, CE = HIGH, (0–40 mA load) 5.7 6 6.3 V
I
REGN_LIM
REGN current limit V
REGN
= 0 V, V
VCC
> V
UVLO
, CE = HIGH 40 mA
TTC INPUT AND SAFETY TIMER
T
PRECHG
Precharge safety timer range
(1)
Precharge time before fault occurs 1440 1800 2160 s
Fast-charge safety-timer range, with
T
CHARGE
Tchg = C
TTC
× K
TTC
1 10 h
±10% accuracy
(1)
Fast-charge timer accuracy
(1)
0.01 μF ≤ C
TTC
≤ 0.11 μF –10% 10%
K
TTC
Timer multiplier 5.6 min/nF
V
TTC
below this threshold disables the safety timer and
TTC low threshold 0.4 V
termination
TTC oscillator high threshold 1.5 V
TTC oscillator low threshold 1 V
TTC source/sink current 45 50 55 μA
BATTERY SWITCH (BATFET) DRIVER
R
DS_BAT_OFF
BATFET turnoff resistance V
ACN
> 5 V 150 Ω
R
DS_BAT_ON
BATFET turnon resistance V
ACN
> 5 V 20 kΩ
V
BATDRV_REG
= V
ACN
– V
BATDRV
when V
ACN
> 5 V and
V
BATDRV_REG
BATFET drive voltage 4.2 7 V
BATFET is on
AC SWITCH (ACFET) DRIVER
R
DS_AC_OFF
ACFET turnoff resistance V
VCC
> 5 V 30 Ω
R
DS_AC_ON
ACFET turnon resistance V
VCC
> 5 V 20 kΩ
V
ACDRV_REG
= V
VCC
– V
ACDRV
when V
VCC
> 5 V and
V
ACDRV_REG
ACFET drive voltage 4.2 7 V
ACFET is on
AC / BAT MOSFET DRIVERS TIMING
Driver dead time Dead time when switching between AC and BAT 10 μs
(1) Verified by design
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