Datasheet

bq24725A
www.ti.com SLUSAL0 –SEPTEMBER 2011
ELECTRICAL CHARACTERISTICS (continued)
4.5 V ≤ V
VCC
≤ 24 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
REGN REGULATOR
V
REGN_REG
REGN regulator voltage V
VCC
> 6.5V, V
ACDET
> 0.6V (0-45mA load) 5.5 6 6.5 V
V
REGN
= 0V, V
VCC
> UVLO charge enabled and not in 50 75
mA
TSHUT
I
REGN_LIM
REGN current limit
V
REGN
= 0V, V
VCC
> UVLO charge disabled or in 7 14
mA
TSHUT
REGN output capacitor required for I
LOAD
= 100µA to 50mA 1
C
REGN
µF
stability
INPUT UNDERVOLTAGE LOCKOUT COMPARATOR (UVLO)
Under voltage rising threshold V
VCC
rising 3.5 3.75 4 V
UVLO
Under voltage hysteresis, falling V
VCC
falling 340 mV
FAST DPM COMPARATOR (FAST_DPM)
Fast DPM comparator stop charging rising threshold with respect to input current limit, voltage
V
FAST_DPM
103% 107% 111%
across input sense resistor rising edge
QUIESCENT CURRENT
Battery BATFET OFF STATE Current,
V
VBAT
= 16.8V, VCC disconnect from battery, BATFET
BATFET off,
I
BAT_BATFET_OFF
5 µA
charge pump off, BATFET turns off, T
J
= 0 to 85°C
I
SRP
+ I
SRN
+ I
PHASE
+ I
ACP
+ I
ACN
Battery BATFET ON STATE Current,
V
VBAT
= 16.8V, VCC connect from battery, BATFET
BATFET on,
I
BAT_BATFET_ON
25 µA
charge pump on, BATFET turns on, T
J
= 0 to 85°C
I
SRP
+ I
SRN
+ I
PHASE
+ I
VCC
+ I
ACP
+ I
ACN
Standby quiescent current, I
VCC
+ I
ACP
+ V
VCC
> UVLO, V
ACDET
> 0.6V, charge disabled,
I
STANDBY
0.65 0.8 mA
I
ACN
T
J
= 0 to 85°C
Adapter bias current during charge, V
VCC
> UVLO, 2.4V < V
ACDET
< 3.15V,
I
AC_NOSW
1.5 3 mA
I
VCC
+ I
ACP
+ I
ACN
charge enabled, no switching, T
J
= 0 to 85°C
Adapter bias current during charge, V
VCC
> UVLO, 2.4V < V
ACDET
< 3.15V,
I
AC_SW
10 mA
I
VCC
+ I
ACP
+ I
ACN
charge enabled, switching, MOSFET Sis412DN
ACOK COMPARATOR
V
ACOK_RISE
ACOK rising threshold V
VCC
> UVLO, V
ACDET
rising 2.376 2.4 2.424 V
V
ACOK_FALL_HYS
ACOK falling hysteresis V
VCC
> UVLO, V
ACDET
falling 35 55 75 mV
V
VCC
> UVLO, V
ACDET
rising above 2.4V,
100 150 200 ms
First time OR ChargeOption() bit [15] = 0
V
ACOK_RISE_DEG
ACOK rising deglitch (Specified by design)
V
VCC
> UVLO, V
ACDET
rising above 2.4V,
(NOT First time) AND ChargeOption() bit [15] = 1 0.9 1.3 1.7 s
(Default)
V
WAKEUP_RISE
WAKEUP detect rising threshold V
VCC
> UVLO, V
ACDET
rising 0.57 0.8 V
V
WAKEUP_FALL
WAKEUP detect falling threshold V
VCC
> UVLO, V
ACDET
falling 0.3 0.51 V
VCC to SRN COMPARATOR (VCC_SRN)
V
VCC-SRN_FALL
VCC-SRN falling threshold V
VCC
falling towards V
SRN
70 125 200 mV
V
VCC-SRN _RHYS
VCC-SRN rising hysteresis V
VCC
rising above V
SRN
100 150 200 mV
ACN to SRN COMPARATOR (ACN_SRN)
V
ACN-SRN_FALL
ACN to BAT falling threshold V
ACN
falling towards V
SRN
120 200 280 mV
V
ACN-SRN_RHYS
ACN to BAT rising hysteresis V
ACN
rising above V
SRN
40 80 120 mV
HIGH SIDE IFAULT COMPARATOR (IFAULT_HI)
(1)
ChargeOption() bit [8] = 1 (Default) 450 750 1200
V
IFAULT_HI_RISE
ACP to PHASE rising threshold mV
ChargeOption() bit [8] = 0 Disable function
LOW SIDE IFAULT COMPARATOR (IFAULT_LOW)
(1)
ChargeOption() bit [7] = 0 (Default) 70 135 220
V
IFAULT_LOW_RISE
PHASE to GND rising threshold mV
ChargeOption() bit [7] = 1 140 230 340
INPUT OVER-VOLTAGE COMPARATOR (ACOV)
V
ACOV
ACDET over voltage rising threshold V
ACDET
rising 3.05 3.15 3.25 V
V
ACOV_HYS
ACDET over voltage falling hysteresis V
ACDET
falling 50 75 100 mV
(1) User can adjust threshold via SMBus ChargeOption() REG0x12.
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