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| BQ2961_17 Datasheet, PDF (12/33 Pages) Texas Instruments – Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion Batteries with Regulated Output Supply | |||
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bq2961, bq2962
SLUSBU5D â NOVEMBER 2013 â REVISED JANUARY 2017
Functional Block Diagram (continued)
R IN
V4
2
C IN
R IN
V3
3
C IN
R IN
V2
4
C IN
RIN
V1
5
C IN
VSS
6
R VD
VDD
1
CVD
UVP_Vref
Comp
+
-
Vref +
Amp
-
REG_EN
V OV
Enable
Programmable
setting
Delay Charging/
Discharge circuit
Delay
Timer
REG_EN
9
PWPD
www.ti.com
PACK+
7 REG
Active
OUT
8
PACK±
Figure 10. bq2961 and bq2962 Block Diagram
8.3 Feature Description
8.3.1 Pin Details
8.3.1.1 Input Sense Voltage, Vx
These inputs sense each battery cell voltage. A series resistor and a capacitor across the cell for each input is
required for noise filtering and stable voltage monitoring.
8.3.1.2 Output Drive, OUT
This terminal serves as the fault signal output in Active High.
8.3.1.3 Supply Input, VDD
This terminal is the unregulated input power source for the device. A series resistor is connected to limit the
current, and a capacitor is connected to ground for noise filtering.
8.3.1.4 Regulated Supply Output, REG
This terminal is connected to an external capacitor and provides a regulated supply to power a circuit such as a
Real Time Clock integrated circuit, or functions requiring a well-regulated supply. Maximum current load on this
pin cannot exceed 1 mA.
12
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Product Folder Links: bq2961 bq2962
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