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BQ29706DSET Datasheet(PDF) 4 Page - Texas Instruments

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Part # BQ29706DSET
Description  Cost-Effective Voltage and Current Protection Integrated Circuit
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

BQ29706DSET Datasheet(HTML) 4 Page - Texas Instruments

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background image
1
NC
6
V–
2
COUT
5
BAT
3
DOUT
4
VSS
4
bq2970, bq2971, bq2972, bq2973
SLUSBU9C – MARCH 2014 – REVISED MARCH 2016
www.ti.com
Product Folder Links: bq2970 bq2971 bq2972 bq2973
Submit Documentation Feedback
Copyright © 2014–2016, Texas Instruments Incorporated
6 Pin Configuration and Functions
DSE Package
6-PIN WSON
Top View
Pin Functions
PIN
TYPE
DESCRIPTION
NAME
NO.
BAT
5
P
VDD pin
COUT
2
O
Gate Drive Output for Charge FET
DOUT
3
O
Gate Drive Output for Discharge FET
NC
1
NC
No Connection (electrically open, do not connect to BAT or VSS)
VSS
4
P
Ground pin
V–
6
I/O
Input pin for charger negative voltage
6.1 Pin Descriptions
6.1.1 Supply Input: BAT
This pin is the input supply for the device and is connected to the positive terminal of the battery pack. There is a
0.1-µF input capacitor to ground for filtering noise.
6.1.2 Cell Negative Connection: VSS
This pin is an input to the device for cell negative ground reference. Internal circuits associated with cell voltage
measurements and overcurrent protection input to differential amplifier for either Vds sensing or external sense
resistor sensing will be referenced to this node.
6.1.3 Voltage Sense Node: V–
This is a sense node used for measuring several fault detection conditions, such as overcurrent charging or
overcurrent discharging configured as Vds sensing for protection. This input, in conjunction with VSS, forms the
differential measurement for the stated fault detection conditions. A 2.2-k
Ω resistor is connected between this
input pin and Pack– terminal of the system in the application.
6.1.4 Discharge FET Gate Drive Output: DOUT
This pin is an output to control the discharge FET. The output is driven from an internal circuitry connected to the
BAT supply. This output will transition from high to low when a fault is detected, and requires the DSG FET to
turn OFF. A high impedance resistor of 5 M
Ω is connected from DOUT to VSS for gate capacitance discharge
when the FET is turned OFF.
6.1.5 Charge FET Gate Drive Output: COUT
This pin is an output to control the charge FET. The output is driven from an internal circuitry connected to the
BAT supply. This output transitions from high to low when a fault is detected, and requires the CHG FET to turn
OFF. A high impedance resistor of 5 M
Ω is connected from COUT to Pack– for gate capacitance discharge when
FET is turned OFF.


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