Power Management Low-Cost, Two-Cell Li-Ion/Li-Pol Battery Charger with Cell-Balancing Support Specification Sheet

AN2309
November 25, 2007 Document No. 001-17394 Rev. *B - 16 -
Two-Cell Battery Charger Parameters
All two-cell battery charger parameters are located in the header file globdefs.h in the project folder. The header file globdefs.h
contains the following parameters:
Table 2. Two-Cell Battery Charger Parameters
Parameter
Unit
Description
Charging Parameters
V
rs
V
Rapid-Charge Stage Start Condition
V
rap
V
Full Charge Voltage (Constant Charge Voltage)
V
crst
V
Recharge Voltage
V
bmax
V
Emergency Shutdown Voltage
V
full_disch
V
Full Discharge Voltage
I
act
A
Activation Stage Charge Current
I
rap
A
Rapid-Charge Stage Current
I
chmax
A
Emergency Shutdown Current
I
rtn
A
Charge Termination Current
Timing Requirements
T
ACT
second
Time Limit for Battery Activation Period
T
RAPID
second
Time Limit for Final Stage of Constant Charge Mode Voltage
T
CHARGE
second
Time Limit for Total Charge Period
T
TERM
second
Minimum Time for Charge Complete (when Ich ≤ Irtn)
Thermistor Measurement Requirements
R
TERM_CH_COLD_STOP
Ohms
Thermistor Resistance for Cold Stop Battery Charge
R
TERM_CH_COLD_RESTART
Ohms
Thermistor Resistance for Cold Restart Battery Charge
R
TERM_CH_HOT_STOP
Ohms
Thermistor Resistance for Hot Stop Battery Charge
R
TERM_CH_HOT_RESTART
Ohms
Thermistor Resistance for Hot Restart Battery Charge
R
TERM_DISCH_COLD_STOP
Ohms
Thermistor Resistance for Cold Stop Battery Discharge
R
TERM_DISCH_HOT_STOP
Ohms
Thermistor Resistance for Hot Stop Battery Discharge
Schematic Parameters
CURRENT_SENSE_R
Ohms
Current-Sense Resistor
TEMPERATURE_R_REF
Ohms
Thermistor Reference Resistor
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