BQ24707 Datasheet, PDF (5/36 Pages) Texas Instruments – 1-4 Cell Li+ Battery SMBus Charge Controller With Independent Comparator and Advanced Circuit Protection

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bq24707
bq24707A
SLUSA78B – JULY 2010 – REVISED MARCH 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
INPUT UNDERVOLTAGE LOCK-OUT COMPARATOR (UVLO)
V_UVLO
Input under voltage rising threshold
V_{UVLO_HYS}
Input under voltage falling hysteresis
FAST DPM COMPARATOR (FAST_DPM)
V_VCC rising
V_VCC falling
3.5
3.75
4
340
V_{FAST_DPM}
Fast DPM comparator stop charging rising threshold
with respect to input current limit, voltage across input
sense resistor rising edge (specified by design)
108%
QUIESCENT CURRENT
I_BAT
Total battery leakage current to I_SRN + I_SRP +I_PHASE +
I_VCC + I_ACP + I_ACN
I_STANDBY
Standby quiescent current, I_VCC + I_ACP + I_ACN
I_{AC_NOSW}
Adapter bias current during charge,
I_VCC + I_ACP + I_ACN
I_{AC_SW}
Adapter bias current during charge,
I_VCC + I_ACP + I_ACN
ACOK COMPARATOR
V_VCC < V_BAT = 16.8V, T_J = 0 to 85°C
V_VCC > V_UVLO, V_ACDET > 0.6V, charge disabled,
T_J = 0 to 85°C
V_VCC > V_UVLO, V_ACDET > 2.4V,
charge enabled, no switching, T_J = 0 to 85°C
V_VCC > V_UVLO, V_ACDET > 2.4V,
charge enabled, switching, MOSFET Sis412DN
15
0.5
1
1.5
3
10
V_{ACOK_FALL}
V_{ACOK_RISE_HYS}
ACOK falling threshold
ACOK rising hysteresis
V_VCC>V_UVLO, V_ACDET rising
V_VCC>V_UVLO, V_ACDET falling
V_VCC>V_UVLO, V_ACDET rising above 2.4V,
ChargeOption() bit [15] = 0 (default), (bq24707 only)
2.376
35
0.9
2.4 2.424
55
75
1.3
1.7
t_{ACOK_FALL_DEG}
ACOK falling deglitch (specified by design)
V_VCC>V_UVLO, V_ACDET rising above 2.4V,
ChargeOption() bit [15] = 0 (default), (bq24707A only)
0.8
1.2
2
V_VCC>V_UVLO, V_ACDET rising above 2.4V,
ChargeOption() bit [15] = 1
10
50
V_{WAKEUP_RISE}
WAKEUP detect rising threshold
V_{WAKEUP_FALL}
WAKEUP detect falling threshold
VCC to SRN COMPARATOR (VCC_SRN)
V_VCC>V_UVLO, V_ACDET rising
V_VCC>V_UVLO, V_ACDET falling
0.57
0.8
0.3
0.51
V_{VCC-SRN_FALL}
VCC-SRN falling threshold
V_{VCC-SRN _RHYS}
VCC-SRN rising hysteresis
HIGH SIDE IFAULT COMPARATOR (IFAULT_HI)⁽¹⁾
V_VCC falling towards V_SRN
V_VCC rising above V_SRN
70
125
180
70
120
170
ChargeOption() bit [8:7] = 00
200
300
450
V_{IFAULT_HI_RISE}
ACP to PHASE rising threshold
ChargeOption() bit [8:7] = 01
ChargeOption() bit [8:7] = 10 (default)
330
500
700
450
700
1000
ChargeOption() bit [8:7] = 11
600
900
1250
LOW SIDE IFAULT COMPARATOR (IFAULT_LOW)
V_{IFAULT_LOW_RISE}
PHASE to GND rising threshold
INPUT OVER-CURRENT COMPARATOR (ACOC)⁽¹⁾
40
110
160
V_ACOC
Adapter over current rising threshold with respect to
input current limit, voltage across input sense resistor
rising edge
ChargeOption() bit [2:1] = 01
ChargeOption() bit [2:1] = 10 (default)
ChargeOption() bit [2:1] = 11
120%
150%
200%
133%
166%
222%
145%
180%
240%
V_{ACOC_min}
Min ACOC threshold clamp voltage
ChargeOption() bit [2:1] = 01 (133%),
InputCurrent() = 0x0400H (10.24mV)
40
45
50
V_{ACOC_max}
Max ACOC threshold clamp voltage
ChargeOption() bit [2:1] = 11 (222%),
InputCurrent() = 0x1F80H (80.64mV)
140
150
160
t_{ACOC_DEG}
ACOC deglitch time (specified by design)
BAT OVER-VOLTAGE COMPARATOR (BAT_OVP)
Voltage across input sense resistor rising to disable charge
1.7
2.5
3.3
V_{OVP_RISE}
Over voltage rising threshold as percentage of
V_{BAT_REG}
V_{OVP_FALL}
Over voltage falling threshold as percentage of
V_{BAT_REG}
CHARGE OVERCURRENT COMPARATOR (CHG_OCP)
V_SRN rising
V_SRN falling
103%
104%
102%
106%
V_{OCP_RISE}
Charge over current rising threshold, measure voltage
drop across current sensing resistor
ChargeCurrent() = 0x0xxxH
ChargeCurrent() = 0x1000H – 0x17C0H
ChargeCurrent() = 0x1800 H– 0x1FC0H
54
60
66
80
90
100
110
120
130
UNIT
V
mV
µA
mA
mA
mA
V
mV
s
ms
μs
V
V
mV
mV
mV
mV
mV
mV
ms
mV
mV
mV
(1) User can adjust threshold via SMBus ChargeOption() REG0x12.
© 2010–2011, Texas Instruments Incorporated
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