BQ24735_17 Datasheet, PDF (7/46 Pages) Texas Instruments – 1- to 4-Cell Li+ Battery SMBus Charge Controller for Supporting Turbo Boost Mode With N-Channel Power MOSFET Selector

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bq24735
SLUSAK9B – SEPTEMBER 2011 – REVISED APRIL 2015
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
I_{BAT_BATFET_ON}
Battery BATFET ON STATE Current,
BATFET on,
I_SRP + I_SRN + 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_VBAT = 16.8 V, VCC connect from battery, BATFET
charge pump on, BATFET turns on, T_J = 0 to 85°C
V_VCC > UVLO, V_ACDET > 0.6 V, charge disabled,
T_J = 0 to 85°C
V_VCC > UVLO, 2.4 V < V_ACDET < 3.15 V,
charge enabled, no switching, T_J = 0 to 85°C
V_VCC > UVLO, 2.4 V < V_ACDET < 3.15 V,
charge enabled, switching, MOSFET Sis412DN
25
0.65
0.8
1.5
3
10
V_{ACOK_RISE}
ACOK rising threshold
V_{ACOK_FALL_HYS}
ACOK falling hysteresis
V_{WAKEUP_RISE}
WAKEUP detect rising threshold
V_{WAKEUP_FALL}
WAKEUP detect falling threshold
VCC to SRN COMPARATOR (VCC_SRN)
V_VCC > UVLO, V_ACDET rising
V_VCC> UVLO, V_ACDET falling
V_VCC> UVLO, V_ACDET rising
V_VCC> UVLO, V_ACDET falling
2.376
35
0.3
2.4 2.424
55
75
0.57
0.8
0.51
V_{VCC-SRN_FALL}
VCC-SRN falling threshold
V_{VCC-SRN _RHYS}
VCC-SRN rising hysteresis
ACN to SRN COMPARATOR (ACN_SRN)
V_VCC falling toward V_SRN
V_VCC rising above V_SRN
70
125
200
100
150
200
V_{ACN-SRN_FALL}
ACN to BAT falling threshold
V_{ACN-SRN_RHYS}
ACN to BAT rising hysteresis
HIGH-SIDE IFAULT COMPARATOR (IFAULT_HI)⁽¹⁾
V_ACN falling toward V_SRN
V_ACN rising above V_SRN
120
200
280
40
80
120
V_{IFAULT_HI_RISE}
ACP to PHASE rising threshold
LOW-SIDE IFAULT COMPARATOR (IFAULT_LOW)⁽¹⁾
ChargeOption() bit [8] = 1 (Default)
ChargeOption() bit [8] = 0 Disable function
450
750 1200
V_{IFAULT_LOW_RISE} PHASE to GND rising threshold
ChargeOption() bit [7] = 0 (Default)
ChargeOption() bit [7] = 1
70
135
220
140
230
340
INPUT OVERVOLTAGE COMPARATOR (ACOV)
V_ACOV
ACDET overvoltage rising threshold
V_{ACOV_HYS}
ACDET overvoltage falling hysteresis
INPUT OVERCURRENT COMPARATOR (ACOC)⁽¹⁾
V_ACDET rising
V_ACDET falling
3.05 3.15 3.25
50
75
100
V_ACOC
Adapter overcurrent rising threshold with
respect to input current limit, voltage
across input sense resistor rising edge
ChargeOption() bit [1] = 1 (Default)
ChargeOption() bit [1] = 0 Disable function
300% 333% 366%
V_{ACOC_min}
Min ACOC threshold clamp voltage
ChargeOption() bit [1] = 1 (333%),
InputCurrent () = 0x0400H (10.24 mV)
40
45
50
V_{ACOC_max}
Max ACOC threshold clamp voltage
ChargeOption() bit [1] = 1 (333%),
InputCurrent () = 0x1F80H (80.64 mV)
135
150
165
BAT OVERVOLTAGE COMPARATOR (BAT_OVP)
V_{OVP_RISE}
Overvoltage rising threshold as percentage
of V_{BAT_REG}
V_{OVP_FALL}
Overvoltage falling threshold as
percentage of V_{BAT_REG}
CHARGE OVERCURRENT COMPARATOR (CHG_OCP)
V_SRN rising
V_SRN falling
103% 104% 106%
102%
V_{OCP_RISE}
Charge overcurrent 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
CHARGE UNDERCURRENT COMPARATOR (CHG_UCP)
V_{UCP_FALL}
Charge undercurrent falling threshold
LIGHT LOAD COMPARATOR (LIGHT_LOAD)
V_SRP falling toward V_SRN
1
5
9
V_{LL_FALL}
V_{LL_RISE_HYST}
Light load falling threshold
Light load rising hysteresis
Measure the voltage drop across current-sensing
resistor
1.25
1.25
UNIT
µA
mA
mA
mA
V
mV
V
V
mV
mV
mV
mV
mV
mV
V
mV
mV
mV
mV
mV
mV
mV
(1) User can adjust threshold through SMBus ChargeOption() REG0x12.
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