SMB118 View Datasheet(PDF) - Summit Microelectronics
Part Name
Description
MFG CO.
'SMB118' PDF : 37 Pages View PDF
PLEASE NOTE: The SMB118 has entered End-of-Life.
SMB118/218
APPLICATIONS INFORMATION (CONTINUED)
increments. The under temperature limit is
programmable from −20°C to 15°C in 5°C increments.
CHARGE TERMINATION TIMERS
There are two timers on the SMB118 and SMB218
used to disable battery charging. The first timer is used
to limit the allowable pre-charge duration. This timer
begins when trickle charging is completed and ends
when fast charging begins. It can be programmed to
one of three settings: 44 minutes, 1 hour 27 minutes,
and 2 hours 55 minutes.
The second timer limits the fast-charge and taper
charge duration. This timer begins when pre-charge
mode is completed and ends when taper charging has
been terminated. It is programmable in three settings, 5
hours 48 minutes, 11 hours 36 minutes, and 23 hours.
Each timer can be independently disabled.
PROGRAMMABLE SWITCHING FREQUENCY
The SMB118 and SMB218 have a 1MHz switching
frequency. If a different frequency is desirable, please
contact the Summit factory.
RCS
USB
AC ADAPTOR
SMB118/218
BATTERY CHARGER
BCHL
VDD
BCSH
BSENSE
BFETDRV
DOCK_DC
TSENSE
10kΩ
NTC
Figure 7 − Battery charging circuit
Summit Microelectronics, Inc
2107 3.0 10/15/2008
23
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