ISL9301 Intersil Corporation, ISL9301 Datasheet - Page 10

• Manufacturer Part Number: ISL9301
• Description: High Input Voltage Charger
• Manufacturer: Intersil Corporation

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VOUT is regulated at 4.5V, the charger is ON, delivering a
trickle charge current.
The IC moves to a fast charge constant current mode when
VBAT reaches the VMIN threshold. There are 3 possible
states in this mode depending on the output current. When
the sum of the output current and the fast charge current is
smaller than the input current limit, the IC enters the Fast
Charge state with the charge current set by R
output current and the fast charge current are greater than
the input current limit, the IC will enter the PPM mode, where
the charging current is reduced to a point such that the sum
of output current and the charging current equals to the input
current limit. If the output current by itself is greater than the
input current limit, the IC enters the Battery Discharge state,
where the battery is discharged to the system to supply a
part of the output demand.
When the battery voltage reaches 4.2V, the IC enters the CV
Charge state, where PPR is LO, CHG is LO and VOUT is
regulated at 4.5V. The battery is being charged at a constant
voltage while the charging current decreases.
When the charging current is reduced to the IMIN threshold,
the IC enters a Charge Complete state, where PPR is LO,
CHG is HI, VOUT is regulated at 4.5V and the charger
continues to charge the battery.
When the timeout interval has elapsed after the Charge
Complete state, the IC will enter the Disabled state, where
the PPR is LO, CHG is HI, VOUT is regulated at 4.5V and
the charger is OFF. After the Charge Complete state, if VBAT
is below the re-charge threshold, the IC will re-initialize and
start a new cycle.
10
IREF
. When the
ISL9301
If the timeout limit is reached before the Charge Complete
state, the IC enters the Charger Fault state, where PPR is
LO, CHG is blinking, VOUT is regulated at 4.5V and the
charger is OFF. This state is latched until the input power is
removed and re-applied to start a new cycle.
Any time during the operation, if the die temperature reaches
the OTP threshold, the IC will enter the OTP state, where
PPR is LO, CHG is HI, and the charger is OFF. VOUT is
disconnected from VIN and connected to VBAT internally to
maintain system power need.
Summary of Output States
The output states under various fault conditions are
summarized in Table 1.
NOTES:
BATON: BATON Pin
OVP: Input Over Voltage Protection
OTP: Over Temperature Protection
M1: Output Path MOSFET
M2: Battery Path MOSFET
TABLE 1. OUTPUT STATES UNDER FAULT CONDITIONS
OTP
Y
Y
N
Y
Y
N
N
OVP
Y
N
Y
Y
N
Y
N
BATON
H
H
H
L
L
L
X
Regulating
OFF
OFF
OFF
OFF
OFF
OFF
M1
February 25, 2008
Charging
M2
ON
ON
ON
OFF
OFF
OFF
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