Cypress CY8C29x66 - Manual (Page 16)

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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