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

BATTERY CHARGING FLOWCHART

POR or SHDN

Release

NO

Taper Charge Mode

Regulate Voltage to

Vfloat

NO

VDD > Vbatt +

200mV ?

(Always

Monitored)

YES

Charger Standby

NO

Mode (timerrs

preserved)

T(hi)>T>T(lo)?

(Always

NO

Monitored)

YES

Vbatt<Vprechg?

YES

Reset t(precharge)

timer

Precharge Mode

Regulate Current to

Iprechg

NO

NO

Reset t(charge) timer

Vbatt<Vfloat

YES

Fast Charge Mode

Regulate Current to

Ichg

YES

Vbatt < Vprechg?

NO

YES

t(precharge)

expired?

YES

t(charge) expired?

NO

YES

Battery Fault

Terminate Charge

YES

Vbat t<Vprechg?

NO

NO

Iout < I(term)?

YES

Terminate Charge

Standby Mode

Vbatt < Vfloat -

100mV?

Figure 9 – Battery charging flowchart.

Summit Microelectronics, Inc

2107 3.0 10/15/2008

25

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