SC900841JVKR2 Freescale Semiconductor, SC900841JVKR2 Datasheet - Page 125

• Manufacturer Part Number: SC900841JVKR2
• Description: IC POWER MGT 338-MAPBGA
• Manufacturer: Freescale Semiconductor

Specifications of SC900841JVKR2

• Applications: PC's, PDA's
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 338-TBGA
• Input Voltage: 2.8 V to 4.4 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

accuracy directly effects the accuracy of I
I
Charger Parameter Programming
the SPI interface:
• Battery float voltage (V
• Constant charge current (I
• End-of-Charge current (I
• Trickle charge current (I
• Battery over-voltage (V
• Charge time monitor timer (t
TRICKLE CHARGE
trickle charge starts. The trickle charge current I
selectable with a default current of 40 mA, and is provided by
Analog Integrated Circuit Device Data
Freescale Semiconductor
CHGCOMP
Pre-Charge 2
Multiple charge parameters are programmable through
Once the charger is enabled and if V
Go to State
TRICKLE = 1
YES
YES
NO
* V
* RDSTATE = 0x07
* MCHGBYP OFF
V
Timer Exipred
Quick Charge
PWR
V
V
CHGENB = 0
TRICKLE = 1
0°C = T
* MCHG ON
BAT
BAT
BAT
. A value of 100 m ±1% is recommended.
Any State
YES
YES
YES
NO
= V
45°C
> V
< V
< V
YES
BAT
NO
TRICKLE
BAT
CHGCV
CHGCV
+ 0.3V
=
* RDSTATE = 0x01
Standby State
NO
YES
NO
NO
NO
NO
YES
NO
10ms
After
* MCHG & MCHGBYP OFF
* MCHG & MCHGBYP OFF
CHGCV
WDTEN = 1
OVRVOLT
* USB/AC Valid (USBDET=1)
TRKL
* V
* RDSTATE = 0x0A
CHGCOMP
* RDSTATE = 0x04
* RDSTATE = 0x08
Constant Voltage
* TIMER = ¼ T
* MCHGBYP OFF
PRE-CHARGE 1
PRE-CHARGE 2
* I
* I
PWR
V
* V
* V
CHGCC
Battery Operation
* RDSTATE = 0x00
* MCHG ON
BAT
* RDSTATE = 0x03
CHG
Battery Detection
CHG
PWR
PWR
CHG
V
= V
)
< V
BAT
= I
= I
)
= 4.2V
= 4.2V
BAT
TRICKLE
TRICKLE
TRICKLE
< V
)
)
NO
+ 0.3V
)
TRICKLE
CHG
)
YES
BAT
Start WDTIMER
CHGCC
YES
Figure 63. Li-Ion Charger State Machine
Pre-Charge 1
Go to State
V
< V
RAWCHGDET
32ms
After
TRKL
V
CHGTRKL
RAWCHOVP
and
V
I
V
CHG
BAT
BAT
< V
YES
Pre-Charge 1
NO
NO
Go to State
> I
, the
> V
RAWCHG
< V
CHGCOMP
TRICKLE
CHGCV
<
is
YES
Langwell
WDTEN?
Cleared
* RDSTATE = 0x02
SCU
NO
YES
YES
USB/AC OVP
0°C = T
0°C = T
0°C = T
Charge Starts and Charge Ends
detected at RAWCHG, CHRENB bit is set to 0, and no faults
exist. A valid RAWCHG voltage is when V
4.75 V. The USB interrupt signal is asserted when V
> 4.75 V. During a charging cycle, if the charger system
experiences any fault, it stops charging and asserts the
appropriate interrupt signal. When a charge cycle completes,
the COMP interrupt signal is asserted indicating a normal
completion of a charge cycle. What constitutes a charge
cycle completion is examined later in this section.
CHARGER STATE MACHINE
an internal current source between V
be seen in
a simple comparator that monitors the battery voltage. The
charger stays in the trickle mode as long as the battery
voltage is below the trickle charge threshold (V
NO
A charging cycle cannot start until a valid voltage is
BAT
BAT
BAT
BATTERY INTERFACE AND POWER PATH MANAGEMENT
NO: Set TEMP INT = 1
NO: Set TEMP INT = 1
NO: Set TEMP INT = 1
= 45°C
= 45°C
= 45°C
Timer Expired?
NO
YES
YES
YES
Figure
V
RAWCHG
YES
Timer Exipred
Timer Exipred
Timer Exipred
63. The trickle charge function consists of
NO
NO
NO
> V
RAWCHOVP
FUNCTIONAL DEVICE OPERATION
YES
YES
YES
Langwell Sets Parameters at any time
SCU sets Parameters at any time
* MCHG & MCHGBYP OFF
* MCHG & MCHGBYP OFF
* MCHG & MCHGBYP OFF
* MCHG & MCHGBYP OFF
* MCHG & MCHGBYP OFF
* MCHG & MCHGBYP OFF
* MCHG & MCHGBYP OFF
Charge Suspend State
* V
Forced Stop Charge
* RDSTATE = 0x0C
* RDSTATE = 0x0D
* RDSTATE = 0x05
* RDSTATE = 0x06
* RDSTATE = 0x09
* RDSTATE = 0x0B
* RDSTATE = 0x0E
PWR
CHGCV /
Stop Charge 1
COMP INT = 1
Stop Charge 2
COMP INT = 1
Stop Charge 3
COMP INT = 1
Stop Charge 4
COMP INT = 1
Stop Charge 5
COMP INT = 1
I
and V
RAWCHG
CHGCC /
I
CHGCOMP /
TRKL
BAT
is >
) of 3.0 V
, as can
RAWCHG
T
CHG
4sec
4sec
4sec
4sec
4sec
4sec
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