CDH2D09 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
MFG CO.
'CDH2D09' PDF : 44 Pages View PDF
PMIC with Integrated Charger and
Smart Power Selector for Handheld Devices
ICHGMAX =
2000
x 1.5V
RCISET
NO INPUT POWER
CST [1:2] = 11
UOK = 0, DOK = 0
ICHG = 0mA
USB AND DC = INVALID
USB AND/OR DC = INVALID
ANY STATE
THERMISTOR SUSPEND
ICHG = 0mA
CST[1:2] = 01
UOK AND/OR DOK = 1
THERMISTOR SUSPEND
ICHG = 0mA
CST[1:2] = 01
UOK AND/OR DOK = 1
THERMISTOR SUSPEND
ICHG = 0mA
CST[1:2] = 01
UOK AND/OR DOK = 1
CHARGER DISABLED
CST[1:2] = 11
UOK AND/OR DOK = 1
ICHG = 0mA
CEN = 1
OR
USUS = 1
THM OUT OF RANGE
IC SUSPENDS TIMER
CEN = 0
USUS = 0
IC SETS TIMER = 0
THM WITHIN RANGE
IC RESUMES TIMER
THM OUT OF RANGE
IC SUSPENDS TIMER
PREQUALIFICATION
CST[1:2] = 00
UOK AND/OR DOK = 1
ICHG = ICHGMAX/10
t > tPREQUAL
VBAT < 2.82V
IC SETS TIMER = 0
VBAT > 3.0V
IC SETS TIMER = 0
TIMER FAULT
CST [1:2] = 10
ICHG = 0mA
UOK AND/OR DOK = 1
THM WITHIN RANGE
IC RESUMES TIMER
FAST-CHARGE
CST[1:2] = 00
UOK AND/OR DOK = 1
ICHG > ICHGMAX x 7%
IC SETS TIMER = 0
ICHG < ICHGMAX x 4%
AND VBAT = 4.2V
IC SETS TIMER = 0
t > tFST-CHG
ICHG < ICHGMAX x 53%
OR VBAT = VBATREG
IC RESUMES TIMER
ICHG < ICHGMAX x 50%
AND VBAT < VBATREG
IC EXTENDS TIMER BY 2x
THM OUT OF RANGE
TOP-OFF
CST[1:2] = 11
UOK AND/OR DOK = 1
VBAT = VBATREG
VBAT <
(VBATREG + VBATRCHG)
IC SETS TIMER = 0
TIMER EXTEND
CST [1:2] = 00
(ISET x 20%) < ICHG < (ICHGMAX x 50%)
THM WITHIN RANGE
t > 15s
t > 15s
DONE
CST[1:2] = 11
UOK AND/OR DOK = 1
(VBATREG + VBATRCHG) < VBAT ≤ VBATREG
ICHG = 0mA
ICHG < ICHGMAX x 20%
AND VBAT < VBATREG
IC SUSPENDS TIMER
ICHG < ICHGMAX x 23%
AND VBAT = VBATREG
IC RESUMES TIMER
TIMER SUSPEND
CST [1:2] = 00
ICHG < (ICHGMAX x 20%)
Figure 7. Charger State Diagram
Charge Status Outputs (CST1, CST2)
CST1 and CST2 are open-drain charger status outputs.
Their function is shown in Table 3 and Figure 7. When
the MAX8671X is used with a µP, pull CST1 and CST2
up to the system logic voltage with resistors to indicate
charge status to the µP. Alternatively, CST1 and CST2
sink up to 20mA each for LED charge indicators.
If the charge status output feature is not required, connect
CST1 and CST2 to ground or leave them unconnected.
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