LTC4098EUDC-3.6 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC4098EUDC-3.6

USB Compatible Switching Power Manager/LiFePO4 Charger with Overvoltage Protection

Linear Technology 

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LTC4098-3.6

OPERATION

POWER ON/

ENABLE CHARGER

CLEAR EVENT TIMER

ASSERT CHRG LOW

YES

NTC OUT OF RANGE

NO

BAT < 2.85V

BATTERY STATE

BAT > VFLOAT – ε

2.85V < BAT < VFLOAT – ε

CHARGE AT

1030V/RPROG RATE

CHARGE WITH

FIXED VOLTAGE

(VFLOAT)

RUN EVENT TIMER

PAUSE EVENT TIMER

RUN EVENT TIMER

INHIBIT CHARGING

PAUSE EVENT TIMER

CHRG CURRENTLY YES

Hi-Z

NO

INDICATE

NTC FAULT

AT CHRG

20

NO

TIMER > 30 MINUTES

YES

INHIBIT CHARGING

NO

TIMER > 1 HOUR

YES

STOP CHARGING

INDICATE BATTERY

FAULT AT CHRG

NO

BAT > 2.85V

YES

BAT RISING

YES

THROUGH

VRECHRG

NO

CHRG HIGH-Z

BAT FALLING

YES

THROUGH

VRECHRG

NO

BAT < VRECHRG

NO

YES

Figure 6. Battery Charger State Diagram

NO

IBAT < C/10

YES

CHRG Hi-Z

40981 F06

409836f

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