PS402-01XX datasheet(39/46 Pages) MICROCHIP

39 / 46 page

 2003 Microchip Technology Inc.

DS21766A-page 39

PS402-01XX

CFCurr

65535

6844

Correction Factor for Current. Adjusts the

scaling of the sense resistor current

measurements. Used to calibrate the

measurement of current at the RSHP and

RSHN input pins. This is set for the size of

the current sense resistor.

CFTempE

65535

1300

Correction Factor for Temperature. Adjusts

the scaling of temperature measured

across an external thermistor at the VNTC

input pin.

CFTempI

65535

23800

Correction Factor for Temperature. Adjusts

the scaling of temperature measured from

the internal temperature sensor.

Calibration: New CF_TEMP = Old

CF_TEMP x (Thermometer[°C] / SBData

Temperature[°C] )

Note: SBData Temperature is reported in

0.1°K normally. It must be converted to °C

for this equation.

CFVPack

65535

20045

Correction Factor for Pack Voltage. Adjusts

the scaling of the pack voltage measure-

ments. Used to calibrate the measurement

of pack voltage.

COCurr

-128

127

-12

Correction Offset for Current. This is the

value the A/D reads when zero current is

flowing through the sense resistor.

COD

-128

127

-12

Correction Offset Deviation - Offset value

for the auto-zero calibration of the current

readings.

SBData Current[mA] = (I_A/D - CO_CURR

- COD) x CF_CURR / 16384

Calibration: CF_CURR = ((Ammeter[mA] x

16384) - 8192) / (Current - I_A/D at OCV)

COTempE

-128

127

-2

Correction Offset for Temperature.

Offset = 0 used for temperature

measurement using internal temperature

sensor.

COTempI

-32768

32767

-11375

Correction Offset for Temperature.

Offset = 0 used for temperature

measurement using internal temperature

sensor.

COVPack

-128

127

Correction Offset for Voltage. Offset factor

used for pack voltage reading.

TABLE 8-8:

CALIBRATION (CONTINUED)

Parameter

Name

Loc.

Bytes

Lower

Limit

Upper

Limit

Typical

Value

Operational Description

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