bq2057, bq2057C
bq2057T, bq2057W
SLUS025F − MAY 2001 − REVISED JULY 2002
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted) (continued)
PARAMETER
CURRENT REGULATION
bq2057 and bq2057C,
High-side current sensing configuration
Current regulation
threshold
bq2057T and bq2057W,
High-side current sensing configuration
bq2057 and bq2057C,
Low-side current sensing configuration
bq2057T and bq2057W,
Low-side current sensing configuration
CHARGE TERMINATION DETECTION
I(TERM)
Charge termination
current detect
threshold
Lower temperature
threshold
Upper temperature
threshold
TS pin voltage
58.3
60
61.8
Voltage at pin SNS, relative to VCC for high-side
sensing, and to Vss for low-side sensing,
0°C
≤
TA
≤
50°C
−24
−14
−4
mV
95.4
113.6
100
118.1
105
125
110
130
115.5
137.5
mV
121
143
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V(SNS)
TEMPERATURE COMPARATOR
V(TS1)
V(TS2)
29.1
30
30.9
%VCC
PRECHARGE COMPARATOR
bq2057
V(min)
Precharge
threshold
bq2057C
bq2057T
bq2057W
PRECHARGE CURRENT REGULATION
Voltage at pin SNS, relative to VCC for high-side
sensing, and to VSS for low-side sensing,
0°C
≤
TA
≤
50°C
Voltage at pin SNS, relative to VCC for high-side
sensing, 0°C
≤
TA
≤
50°C, VCC = 5 V
13
mV
2.94
3.04
5.98
6.18
3
3.1
6.1
6.3
3.06
3.16
6.22
6.43
V
I(PRECHG)
Precharge current
regulation
3
13
22
mV
VRCH COMPARATOR (Battery Recharge Threshold)
Recharge
threshold
bq2057 and bq2057C
bq2057T and bq2057W
VO(REG)−
98 mV
VO(REG)−
196 mV
VO(REG)−
100 mV
VO(REG)−
200 mV
VO(REG)−
102 mV
VO(REG)−
204 mV
V
V(RCH)
CHARGE-RATE COMPENSATION (AutoComp)
V(BAT)+0.3 V
≤
VCC
≤
VCC(max), bq2057, bq2057C,
bq2057T, bq2057W
G(COMP)
AutoComp gain
V(BAT)+0.3 V
≤
VCC
≤
VCC(max), bq2057T and
bq2057W in low-side sensing configuration
1.87
2.09
2.2
2.4
2.53
V/V
2.76
STAT PIN
VOL(STAT)
VOH(STAT)
CC PIN
VOL(CC)
IO(CC)
Output low voltage
Sink current
IO(CC) = 5 mA (sink)
Not to exceed power rating specification (PD)
1.5
5
40
V
mA
Output (low)
voltage
Output (high)
voltage
IOL = 10 mA
IOH = 5 mA
VCC-0.5
0.7
V
6
www.ti.com
TI [ TEXAS INSTRUMENTS ]
