PS401-I/SS Microchip Technology, PS401-I/SS Datasheet - Page 35

• Manufacturer Part Number: PS401-I/SS
• Description: IC FUEL GAUGE BATTERY MGR 28SSOP
• Manufacturer: Microchip Technology

Specifications of PS401-I/SS

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TABLE 8-6:
 2003 Microchip Technology Inc.
EEversion
FLAGS1
LUTSelection
NSample
OSCTrim
PNModeDelay
ProgLock
PTRActualData
RFactor
SampleLimit
Parameter
Name
PS401 SETTINGS (CONTINUED)
Loc.
OTP
EE
EE
EE
EE
EE
EE
EE
EE
EE
# Bytes
1
1
1
1
1
1
2
2
1
1
Lower
Limit
0
0
0
0
0
0
0
0
0
0
Upper
65535
65535
Limit
255
255
255
255
255
255
255
255
b00000000 b00xxxxxx = LUT 0
b00100110 Bit coded as follows:
Typical
0x1721
Value
125
10
10
15
1
7
EE version.
Bit
7
6
5
4
3
2
1
0
b01xxxxxx = LUT 1
b10xxxxxx = LUT 2
b11xxxxxx = LUT 3
bits 5-0 are unused
Frequency of ADC activity in Sample mode.
The A/D converter will make measurements
every NSample periods while in Sample
mode. In Run mode, new measurements
are taken every period.
RC oscillator trimming.
Time slot for Programming mode. When the
PS401 is put into Programming mode to
program the EEPROM through the SMBus,
it will stay in Programming mode for
PNModeDelay /2 periods before
automatically returning to Normal mode.
For PNModeDelay = 16, period = 0.5, the
PS401 will stay in Programming mode for 8
seconds. EEPROM programming must be
finished in this amount of time.
Code for EEPROM programming function.
Determines successful EEPROM update.
Internal P4 code only.
OTP starting address of current data block.
C-Rate scaling. R
used to scale all C-rate values, such as
taper current values and lookup table
C-rates. For a maximum allowable C-rate of
4C in these values, set R
changing R
in lookup tables and other parameters for
use with higher current systems, without
changing all the other values.
Value used to determine the current
threshold for entry/exit for Sample and Run
modes:
Threshold [mA] = SampleLimit x
CfCurr / 16384
Function
Enable precharge max current check
Hold Charge Current = 0 until next
discharge
Int/Ext temp
Disable SLEEP in main IDLE mode
Require Run mode for low voltage
SLEEP mode
Disable safety GPIO
Pack resistance enable
Enable Run mode detect
Operational Description
F
you can scale all C-rate values
F
=28/max C-Rate. This is
F
DS40238B-page 35
to 28/4 = 7. By
PS401