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L9961 Datasheet(PDF) 53 Page - STMicroelectronics

Part # L9961
Description  Battery management system solution
PDF  65 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9961 Datasheet(HTML) 53 Page - STMicroelectronics

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Components Value Unit Max. tolerance Rating
Comments
RNSHIP_PD
100
kΩ
10%
1/10 W Pull-down resistor
RWAKEUP
1
kΩ
10%
1/10 W Debouncing filter resistor for pushbutton
CNSHIP
100
nF
10%
50 V
Debouncing filter capacitor for pushbutton
CWAKEUP
100
nF
10%
50 V
Debouncing filter capacitor for pushbutton
CRDY
100
pF
10%
16 V
LPF capacitor for RDY signal. The filter cut-off frequency is
fC= 1
2πRRDYCRDY
PB
Pushbutton to wakeup L9961 from SHIPMENT - DEEP SLEEP state
DWAKEUP
40
V
Blocking diode
5.8
Charger connection
In case of LS configuration if the charger is hot-plugged (that is with its two terminals not in HiZ condition), the
VSC pin needs to be protected against AMR violation. ST recommends the application circuit in Figure 23.
On the contrary, the HS configuration does not require any additional component but requires to connect FET’s
common drain to Vb in order to feed the CP with the higher voltage between battery stack and battery charger,
thus ensuring the right overdrive to switch on discharge MOSFET.
Figure 23. Application circuit in LS/HS configuration
GADG220620221409SA
L9961
VSD
DCHG CHG
VSC
P+
P-
RDCHG
RCHG
MDCHG
MCHG
LS configuration
DZCHG
VB
DCX144EU-7-F
RGCHG
HS configuration
L9961
P-
P+
VSD
DCHG
CHG
VSC
RDCHG
RCHG
MDCHG
MCHG
VB
P-
P+
Table 40. BOM in LS configuration when charger is hot-plugged
Components
Value Unit Max. tolerance Rating
Comments
RCHG
220
kΩ
10%
1/10 W Pull-down resistor
RGCHG
20
kΩ
10%
1/10 W Limits Zener current
DZCHG
14
V
Clamps the VGS of the CHG MOSFET
DCX144EU-7-F
Level shifter used to drive the CHG MOSFET. DCX144EU-7-F NPN-
PNP transistor switch pair is suggested.
L9961
Charger connection
DS14012 - Rev 3
page 53/65



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