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BQ25700ARSNR Datasheet(PDF) 6 Page - Texas Instruments

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Part # BQ25700ARSNR
Description  SMBus Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

BQ25700ARSNR Datasheet(HTML) 6 Page - Texas Instruments

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bq25700A
SLUSCQ8 – MAY 2017
www.ti.com
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Copyright © 2017, Texas Instruments Incorporated
Pin Functions (continued)
PIN
I/O
DESCRIPTION
NAME
NUMBER
SRN
19
PWR
Charge current sense resistor negative input. SRN pin is for battery voltage sensing as well.
Connect SRN pin with optional 0.1-μF ceramic capacitor to GND for common-mode filtering.
Connect a 0.1-μF ceramic capacitor from SRP to SRN to provide differential mode filtering.
The leakage current on SRP and SRN are matched. For reverse battery plug-in protection,
10-Ω series resistors are placed on SRP and SRN.
SRP
20
PWR
Charge current sense resistor positive input. Connect 0.1-μF ceramic capacitor from SRP to
SRN to provide differential mode filtering. The leakage current on SRP and SRN are
matched. For reverse battery plug-in protection, 10-Ω series resistors are placed on SRP and
SRN. Connect SRP pin with optional 0.1-uF ceramic capacitor to GND for common-mode
filtering.
SW1
32
PWR
Buck mode high side power MOSFET driver source. Connect to the source of the high side
n-channel MOSFET.
SW2
23
PWR
Boost mode high side power MOSFET driver source. Connect to the source of the high side
n-channel MOSFET.
VBUS
1
PWR
Charger input voltage. An input low pass filter of 1Ω and 0.47 µF (minimum) is
recommended.
VDDA
7
PWR
Internal reference bias pin. Connect a 10-Ω resistor from REGN to VDDA and a 1-μF
ceramic capacitor from VDDA to power ground.
VSYS
22
PWR
Charger system voltage sensing. The system voltage regulation limit is programmed in
REG0x15() and REG0x3E().
Thermal pad
Exposed pad beneath the IC. Analog ground and power ground star-connected near the IC's
ground. Always solder thermal pad to the board, and have vias on the thermal pad plane
connecting to power ground planes. It also serves as a thermal pad to dissipate the heat.


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