BQ24170 Datasheet, PDF (11/35 Pages) Texas Instruments – 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger

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bq24170
bq24172
SLUSAD2A – NOVEMBER 2010 – REVISED NOVEMBER 2010
ELECTRICAL CHARACTERISTICS (continued)
4.5V ≤ V(PVCC, AVCC) ≤ 17V, –40°C < T_J + 125°C, typical values are at T_A = 25°C, with respect to AGND (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP MAX UNITS
BAT OVER-VOLTAGE COMPARATOR
V_{OV_RISE}
Over-voltage rising threshold
As percentage of V_{BAT_REG} (bq24170) or V_{FB_REG}
(bq24172)
104%
V_{OV_FALL}
Over-voltage falling threshold
As percentage of V_SRN (bq24170) or V_{FB_REG}
(bq24172)
102%
INPUT OVER-VOLTAGE COMPARATOR (ACOV)
V_ACOV
AC Over-Voltage Rising Threshold to turn
off ACFET
OVPSET rising
1.55
1.6 1.65
V
V_{ACOV_HYS}
t_{ACOV_RISE_DEG}
AC over-voltage falling hysteresis
AC Over-Voltage Rising Deglitch to turn off
ACFET and Disable Charge
OVPSET falling
OVPSET rising
50
mV
1
µs
t_{ACOV_FALL_DEG}
AC Over-Voltage Falling Deglitch to Turn on
ACFET
OVPSET falling
30
ms
INPUT UNDER-VOLTAGE COMPARATOR (ACUV)
V_ACUV
AC Under-Voltage Falling Threshold to turn
off ACFET
OVPSET falling
0.45
0.5 0.55
V
V_{ACUV_HYS}
t_{ACOV_FALL_DEG}
AC Under-Voltage Rising Hysteresis
AC Under-Voltage Falling Deglitch to turn
off ACFET and Disable Charge
OVPSET rising
OVPSET falling
100
mV
1
µs
t_{ACOV_RISE_DEG}
AC Under-Voltage Rising Deglitch to turn on
ACFET
OVPSET rising
30
ms
THERMAL REGULATION
T_{J_REG}
Junction Temperature Regulation Accuracy ISET > 120mV, Charging
THERMAL SHUTDOWN COMPARATOR
120
°C
T_SHUT
Thermal shutdown rising temperature
T_{SHUT_HYS}
Thermal shutdown hysteresis
t_{SHUT_RISE_DEG}
Thermal shutdown rising deglitch
t_{SHUT_FALL_DEG}
Thermal shutdown falling deglitch
THERMISTOR COMPARATOR
Temperature rising
Temperature falling
Temperature rising
Temperature falling
150
°C
20
°C
100
µs
10
ms
V_LTF
V_{LTF_HYS}
Cold Temperature Threshold, TS pin
Voltage Rising Threshold
Cold Temperature Hysteresis, TS pin
Voltage Falling
Charger suspends charge. As percentage to
V_VREF
As percentage to V_VREF
72.5% 73.5% 74.5%
0.2%
0.4% 0.6%
V_HTF
Hot Temperature TS pin voltage rising
Threshold
As percentage to V_VREF
46.6% 47.2% 48.8%
V_TCO
Cut-off Temperature TS pin voltage falling
Threshold
As percentage to V_VREF
44.2% 44.7% 45.2%
t_{TS_CHG_SUS}
Deglitch time for Temperature Out of Range V_TS > V_LTF, or V_TS < V_TCO, or
Detection
V_TS < V_HTF
t_{TS_CHG_RESUME}
Deglitch time for Temperature in Valid
Range Detection
V_TS < V_LTF – V_{LTF_HYS} or V_TS >V_TCO, or V_TS >
V_HTF
CHARGE OVER-CURRENT COMPARATOR (CYCLE-BY-CYCLE)
20
ms
400
ms
V_{OCP_CHRG}
Charge Over-Current Rising Threshold,
V_SRP>2.2V
V_{OCP_MIN}
Charge Over-Current Limit Min, V_SRP<2.2V
V_{OCP_MAX}
Charge Over-Current Limit Max, V_SRP>2.2V
HSFET OVER-CURRENT COMPARATOR (CYCLE-BY-CYCLE)
Current as percentage of fast charge current
Measure V_SRP-SRN
Measure V_SRP-SRN
160%
45
mV
75
mV
I_{OCP_HSFET}
Current limit on HSFET
Measure on HSFET
CHARGE UNDER-CURRENT COMPARATOR (CYCLE-BY-CYCLE)
8
11.5
A
V_UCP
Charge under-current falling threshold
Measure on V_(SRP-SRN)
1
5
9 mV
Copyright © 2010, Texas Instruments Incorporated
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