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bq20z65 circuit design difficulties

Other Parts Discussed in Thread: BQ29330, BQ20Z70

Hi,

attached hereby is a compressed rar file, comprising of 4 images and i have the following doubts concernig the circuit design as referenced to those images :

image name :-bq29330 : The pack- of bq29330 (ie SRN pin) is also connected to a "low power ground ". Is this the control ground in my terminology ? if yes then i am driving a inductive load on the battery (dc motor) which gives a back emf ,wont it affect my control circuit ics ,since there is no isolation ?AND WHAT IF I AM USING ONLY ONE BATTERY, I AM DRIVING THE CONTROL CIRCUIT VIA A STEP DOWN REGULATOR.

img chassis ground : As marked in the image, i couldnt understand where exactly shoud i connect these grounds.

img sense resistor : same as img bq29330.

img pres pin : One end of the diode is floating , is it to be connected somewhere ?

 

 

 

thanks in advance.

CIRCUIT DESIGN.doc