BQ2057CSN BENCHMARQ, BQ2057CSN Datasheet - Page 19
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BQ2057CSN
Manufacturer Part Number
BQ2057CSN
Description
PROG BATTERY CHARGER, 2057, SOIC8
Manufacturer
BENCHMARQ
Datasheet
1.BQ2057CSN.pdf
(31 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
BQ2057CSN
Manufacturer:
TIBB
Quantity:
529
Part Number:
BQ2057CSN
Manufacturer:
TI/德州仪器
Quantity:
20 000
Part Number:
BQ2057CSNTR
Manufacturer:
TI/德州仪器
Quantity:
20 000
automatic charge-rate compensation (continued)
The following example illustrates these calculations:
Assume Z
Let R
Use the closest standard value (36.0 kΩ) for R
V
V
V
V
R
R
V
V
R
(Z)
(Z)
(COMP)
(COMP)
COMP1
COMP1
(Z)
(COMP)
COMP1
COMP2
(PACK)
+ Z
+ 0.1
= 50 mV
(PACK)
= 22.7 mV
+
+
+ 0.05
+ 10k
+ 36.25 kW
= 10 kΩ
= 100 mΩ, I
R
G
2.2
0.5
COMP2
(COMP)
V
(Z)
I
( 105 mV * 22.7 mV )
(REG)
(REG)
V
22.7 mV
V
APPLICATION INFORMATION
(COMP)
(SNS)
= 500 mA, high-side current sensing bq2057C
* V
(COMP)
www.ti.com
COMP1
SLUS025F − MAY 2001 − REVISED JULY 2002
(16)
(17)
(18)
19