BQ2057CSN BENCHMARQ, BQ2057CSN Datasheet - Page 19

• 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

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