BQ2057CSN BENCHMARQ, BQ2057CSN Datasheet - Page 13

• Manufacturer Part Number: BQ2057CSN
• Description: PROG BATTERY CHARGER, 2057, SOIC8
• Manufacturer: BENCHMARQ

Specifications of BQ2057CSN

• Battery Type: Li-Ion / Li-Polymer
• Input Voltage: 15V
• Battery Charge Voltage: 4.2V
• Charge Current Max: 2A
• Battery Ic Case Style: SOIC
• No. Of Pins: 8
• No. Of Series Cells: 1
• Operating Temperature: RoHS Compliant

battery temperature monitoring (continued)
DC+
DC−
R T1
Where R
specified by the thermistor manufacturer.
R
the V
T1
R T2
R SNS
For PTC Thermistors
or R
(TS1)
R
R
T2
(TC)
T1
T2
High-Side Current Sensing
and V
can be omitted If only one temperature (hot or cold) setting is required. Applying a voltage between
+
+
is the cold temperature resistance and R
SNS
BAT
VCC
TS
3
(TS2)
5
bq2057
2
5
R
R
R
thresholds to pin TS disables the temperature-sensing feature.
COMP
TH
TH
STAT
TH
VSS
R
CC
TH
* R
– 7
R
Figure 9. Temperature Sensing Circuits
Figure 10. bq2057 TS Input Thresholds
TC
TC
R
APPLICATION INFORMATION
TC
R
Normal Temperature Range
TC
BAT+
BAT−
Thermistor
Temperature Fault
Temperature Fault
www.ti.com
(TH)
DC−
is the hot temperature resistance of thermistor, as
DC+
V CC
V (TS2)
V (TS1)
V SS
Low-Side Current Sensing
SNS
BAT
VCC
TS
bq2057
SLUS025F − MAY 2001 − REVISED JULY 2002
COMP
STAT
VSS
CC
R SNS
R T1
R T2
BAT+
Thermistor
BAT−
(5)
(6)
13