BQ24735 Datasheet, PDF (7/42 Pages) Texas Instruments – 1-4 Cell Li+ Battery SMBus Charge Controller for Supporting Turbo Boost Mode with N-Channel Power MOSFET Selector

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bq24735
SLUSAK9 – 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
REGN REGULATOR
V_{REGN_REG}
I_{REGN_LIM}
REGN regulator voltage
REGN current limit
V_VCC > 6.5V, V_ACDET > 0.6V (0-45mA load)
V_REGN = 0V, V_VCC > UVLO charge enabled and not in
TSHUT
V_REGN = 0V, V_VCC > UVLO charge disabled or in
TSHUT
5.5
6
6.5
50
75
7
14
C_REGN
REGN output capacitor required for
stability
I_LOAD = 100µA to 50mA
1
INPUT UNDERVOLTAGE LOCKOUT COMPARATOR (UVLO)
UVLO
Under voltage rising threshold
Under voltage hysteresis, falling
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
103% 107% 111%
QUIESCENT CURRENT
I_{BAT_BATFET_OFF}
Battery BATFET OFF STATE Current,
BATFET off,
I_SRP + I_SRN + I_PHASE + I_ACP + I_ACN
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 = 16.8V, VCC disconnect from battery, BATFET
charge pump off, BATFET turns off, T_J = 0 to 85°C
V_VBAT = 16.8V, VCC connect from battery, BATFET
charge pump on, BATFET turns on, T_J = 0 to 85°C
V_VCC > UVLO, V_ACDET > 0.6V, charge disabled,
T_J = 0 to 85°C
V_VCC > UVLO, 2.4V < V_ACDET < 3.15V,
charge enabled, no switching, T_J = 0 to 85°C
V_VCC > UVLO, 2.4V < V_ACDET < 3.15V,
charge enabled, switching, MOSFET Sis412DN
5
25
0.65
0.8
1.5
3
10
V_{ACOK_RISE}
V_{ACOK_FALL_HYS}
V_{ACOK_RISE_DEG}
ACOK rising threshold
ACOK falling hysteresis
ACOK rising deglitch (Specified by design)
V_VCC > UVLO, V_ACDET rising
V_VCC> UVLO, V_ACDET falling
V_VCC> UVLO, V_ACDET rising above 2.4V,
First time OR ChargeOption() bit [15] = 0
V_VCC> UVLO, V_ACDET rising above 2.4V,
(NOT First time) AND ChargeOption() bit [15] = 1
(Default)
2.376
35
100
2.4 2.424
55
75
150
200
0.9
1.3
1.7
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
0.57
0.8
0.3 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 towards 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 towards 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 OVER-VOLTAGE COMPARATOR (ACOV)
V_ACOV
V_{ACOV_HYS}
ACDET over voltage rising threshold
ACDET over voltage falling hysteresis
V_ACDET rising
V_ACDET falling
3.05 3.15 3.25
50
75
100
UNIT
V
mA
mA
µF
V
mV
µA
µA
mA
mA
mA
V
mV
ms
s
V
V
mV
mV
mV
mV
mV
mV
V
mV
(1) User can adjust threshold via SMBus ChargeOption() REG0x12.
Copyright © 2011, Texas Instruments Incorporated
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