SMB118 SUMMIT Microelectronics, Inc:, SMB118 Datasheet - Page 23

• Manufacturer Part Number: SMB118
• Description: Six-channel Programmable Dc-dc Power Managers With Battery Charger
• Manufacturer: SUMMIT Microelectronics, Inc:

increments.
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.
Summit Microelectronics, Inc
APPLICATIONS INFORMATION (CONTINUED)
The
under
temperature
limit
2107 2.4 5/5/2008
is
PROGRAMMABLE SWITCHING FREQUENCY
The SMB118 and SMB218 have a 1MHz switching
frequency. If a different frequency is desirable, please
contact the Summit factory.
Figure 7 − Battery charging circuit
AC ADAPTOR
USB
R
CS
BCSH
BCHL
BFETDRV
DOCK_DC
BATTERY CHARGER
Preliminary Specification
SMB118/218
SMB118/218
TSENSE
BSENSE
VDD
10kΩ
NTC
23