LTC4009-2_15 Datasheet, PDF (25/28 Pages) Linear Technology – High Efficiency, Multi-Chemistry Battery Charger

LTC4009
LTC4009-1/LTC4009-2
Applications Information
10. If possible, place all the parts listed above on the same
PCB layer.
11. Copper fills or pours are good for all power connections
except as noted above in Rule 3. Copper planes on
multiple layers can also be used in parallel. This helps
with thermal management and lowers trace inductance,
which further improves EMI performance.
12. For best current programming accuracy, provide a
Kelvin connection from R_SENSE to CSP and CSN. See
Figure 13 for an example.
13. It is important to minimize parasitic capacitance on
the CSP and CSN pins. The traces connecting these
pins to their respective resistors should be as short
as possible.
DIRECTION OF CHARGING CURRENT
R_SENSE
4009 F13
TO CSP
R_IN
TO CSN
R_IN
Figure 13. Kelvin Sensing of Charge Current
4009fd
25