SMB218 View Datasheet(PDF) - Summit Microelectronics

Part Name

Description

Manufacturer

SMB218

Six-Channel Programmable DC-DC Power Managers with Battery Charger

Summit Microelectronics 

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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