PS401-I/SS Microchip Technology, PS401-I/SS Datasheet - Page 13

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

Specifications of PS401-I/SS

• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification

To compensate RSOC and RM, interpolation will be
used and the compensation adjustment can happen in
real-time to avoid sudden drops or jumps. Every time
the temperature decreases by one degree, a new
interpolated value will be subtracted from RSOC and
RM. Every time the temperature increases by one
degree, RSOC and RM will be held constant until
discharged capacity equals the interpolated value that
should have been added to RSOC and RM (to avoid
capacity increases during discharge). With this
TABLE 4-1:
TABLE 4-2:
TABLE 4-3:
 2003 Microchip Technology Inc.
TEOD 8 coded bytes
EOD Temperature boundaries, 8 increasing values of temperature coded as TEODx = (Tcelsius*10+200)/4
CEOD 8 coded bytes
EOC C-rate boundaries, 8 increasing values of C-rates coded:
CEODx = C-rate * (256/28/R
For R
FCCP coded %
Unusable residual capacity before save to disk, corresponding to temperature. 255 = 100%
VEOD coded
End-of-discharge voltage, voltage = 2700 + 4 * VEOD. Cell voltage at which save to disk is signaled.
CEOD(1)
CEOD(2)
CEOD(3)
CEOD(4)
CEOD(5)
CEOD(6)
CEOD(7)
CEOD(8)
Capacity
< 0.2C
< 0.5C
< 0.8C
< 1.1C
< 1.4C
< 1.7C
< 2.0C
< 2.0C
F
= 7, CEODx = C-rate * 64. Thus, a value of 32 is one-half C, etc.
TEOD(1)
Veod1(1)
Veod2(1)
Veod3(1)
Veod4(1)
Veod5(1)
Veod6(1)
Veod7(1)
Veod8(1)
FCCP(1)
V_EOD LOOKUP TABLE
VALUE NAMES IN THE OTP
VALUE DEFINITIONS IN THE OTP EPROM
<-10°
20%
V1
Veod1(2)
Veod2(2)
Veod3(2)
Veod4(2)
Veod5(2)
Veod6(2)
Veod7(2)
Veod8(2)
TEOD(2)
FCCP(2)
F
), where R
typ: 5,20,35,50,80,113,150,150
typ: 19,32,48,64,77,90,109,109
typ: 50,25,12,8,0,0,0
typ: 75
10%
<0°
V2
F
Veod1(3)
Veod2(3)
Veod3(3)
Veod4(3)
Veod5(3)
Veod6(3)
Veod7(3)
Veod8(3)
TEOD(3)
FCCP(3)
is the Rate Factor (R
<10°
5%
V3
TEOD(4)
Veod1(4)
Veod2(4)
Veod3(4)
Veod4(4)
Veod5(4)
Veod6(4)
Veod7(4)
Veod8(4)
FCCP(4)
<20°
3%
–
interpolation happening in real-time, there will be no big
jumps or extended flat periods as we cross over
boundaries in the LUT.
Table 4-1 is an example of the various voltage values
that will signal the save to disk points as a function of
temperature and discharge rate. Also shown is the
amount of capacity used before "save to disk" that will
be utilized to compensate RSOC.
Table 4-2 shows the actual names of the values in the
OTP EPROM, Table 4-3 shows the value definitions:
F
actor) OTP EPROM parameter.
TEOD(5)
Veod1(5)
Veod2(5)
Veod3(5)
Veod4(5)
Veod5(5)
Veod6(5)
Veod7(5)
Veod8(5)
FCCP(5)
<30°
0%
–
TEOD(6)
Veod1(6)
Veod2(6)
Veod3(6)
Veod4(6)
Veod5(6)
Veod6(6)
Veod7(6)
Veod8(6)
FCCP(6)
<40°
V62
0%
Range: 1-255 per byte
Range: 1-255
Range: 1-255
Range: 1-255
Veod1(7)
Veod2(7)
Veod3(7)
Veod4(7)
Veod5(7)
Veod6(7)
Veod7(7)
Veod8(7)
TEOD(7)
FCCP(7)
<50°
V63
0%
DS40238B-page 13
PS401
Veod1(8)
Veod2(8)
Veod3(8)
Veod4(8)
Veod5(8)
Veod6(8)
Veod7(8)
Veod8(8)
TEOD(8)
FCCP(8)
<60°
V64
0%