ds2710 Maxim Integrated Products, Inc., ds2710 Datasheet - Page 11

• Manufacturer Part Number: ds2710
• Description: Single-cell Nimh Charger
• Manufacturer: Maxim Integrated Products, Inc.

Referring to the example circuit and layout of Figure 6,
the loop labeled as Loop1 encompassing C
Q
possible to minimize the change in loop area that
occurs when switching from the OFF to the ON state
and vice versa. Loop2 should also be minimized as
much as practical, although it contains DC current
components for the most part. The returning ground
currents should be allowed to follow a path on a layer
directly under the outgoing path since the high-fre-
quency components try to follow the path of least
impedance. Low ESR and ESL capacitors should be
used when possible and for all capacitors 10µF and
smaller. Typical surface-mount ceramic types with an
X5R or better dielectric are recommended.
Figure 5. Typical Application Circuit for USB Port Charging
SWITCH
, and D
GROUND
(USB+)
(USB-)
+5V
SWITCH
______________________________________________________________________________________
1μF
C1
should be kept as small as
103AT-2
RT1
150Ω
10kΩ
R1
R4
CERAMIC
10μF
1kΩ
C2
R2
D1
GREEN
SMA
ZXM62P02E6
V
THM
STATUS
DD
IN
Q1
CS
TMR
Single-Cell NiMH Charger
,
R7
100kΩ
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
Another important layout detail is the connection of the
sense resistor. Proper Kelvin connection layout should
be used to ensure the signal quality viewed by the
sensing circuit inside the DS2710 is adequate. Figure 7
shows a recommended connection of the sense lines to
the resistor footprint.
270kΩ
PACKAGE TYPE
R3
DS2710
SISCDRH74M-150R
CTEST
10 TDFN-EP
D2
1W B340A-13
SCHOTTKY
R8
47kΩ
15μH
L1
V
SS
VN1
VN0
VP1
C3
10μF
CERAMIC
PACKAGE CODE
Package Information
—
1kΩ
R6
R9
0.1Ω
1W
1S
NiMH
CELL
DOCUMENT NO.
56-G0012-001
11