Datasheet

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