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L9961 データシート(PDF) 48 Page - STMicroelectronics

部品番号 L9961
部品情報  Battery management system solution
PDF  63 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9961 データシート(HTML) 48 Page - STMicroelectronics

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Components Value Unit
Max.
tolerance
Rating
Comments
RISENSE
22
Ω
1%
1/10 W
It is used both filter differential and common mode noise on
the ISENSEp/ISENSEm input. The differential filter cut-off frequency
is
fC=
1
4πRISENSECISENSE_1+CISENSE_2+CISENSE_CM
2 .The
common mode filter cut-off frequency is
fC= 1
2πRISENSECISENSE_CM
CISENSE_CM
4.7
μF
10%
16 V
Filter common mode noise. The common mode filter cut-off frequency is
fC= 1
2πRISENSECISENSE_CM
CISENSE_1
4.7
μF
10%
16 V
Filter differencial low frequency noise on the ISENSEp/ISENSEm input.
The differential filter cut-off frequency is
fC=
1
4πRISENSECISENSE_1+CISENSE_2+CISENSE_CM
2
CISENSE_2
22
nF
10%
16 V
Filter differencial high frequency noise on the ISENSEp/ISENSEm input.
The differential filter cut-off frequency is
fC=
1
4πRISENSECISENSE_1+CISENSE_2+CISENSE_CM
2 .
5.4
NTC analog front end
Figure 19. NTC measurement circuit
GADG220620221358SA
L9961
NTC
OD
CFIL
VREG
RFIL
RPU
RNTC
Table 36. NTC analog front end BOM
Components
Value Unit
Max. tolerance
Rating
Comments
RNTC
33
kΩ
10%
1/10 W
NTC resistor
RPU
33
kΩ
10%
1/10 W
Provide VREG/2 polarization for NTC typical value
RFIL
10
kΩ
10%
1/10 W
Filter the NTC signal: cut-off frequency is
fC= 1
2πRFILCFIL
CFIL
10
nF
10%
16 V
Filter the NTC signal: cut-off frequency is
fC= 1
2πRFILCFIL
L9961
NTC analog front end
DS14012 - Rev 1
page 48/63



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