ISL9301 Intersil Corporation, ISL9301 Datasheet - Page 5

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

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IREF - Charge-current program and monitoring pin. Connect
a resistor between this pin and the GND pin to set the
charge current limit determined by Equation 4:
Where R
the actual charge current during the entire charge cycle,
including the trickle, constant-current, and constant-voltage
phases. When disabled, V
BATON - Battery disconnect pin. The BATON pin is a logic
input pin to allow the disconnection of the battery from the
system to eliminate the unwanted drainage current from the
battery. There is an internal 1MΩ pull-down resistor at this
pin. Drive to HIGH to connect the battery to the system.
When this pin is driven to LOW or left floating, the battery is
disconnected from the system.
VOUT - Output connection to the system. This pin provides
a 4.5V regulated voltage for the system when a valid input
power is present. If no valid input is present, and BATON is
driven HI, the VOUT pin is connected to VBAT through an
internal MOSFET. If no valid input is present and BATON is
LOW, the voltage at VOUT pin is zero. A 4.7µF or larger X5R
ceramic capacitor is recommended for decoupling and
stability purposes.
EPAD - Exposed pad. Connect as much copper as possible
to this pad either on the component layer or other layers
through thermal vias to enhance the thermal performance.
I
REF
16%I
CHG
4.2V
2.8V
I
REF
REF
=
---------------- -
R
Trickle
3886
IREF
IREF
FIGURE 1. TYPICAL CHARGING CYCLE
is in kΩ. The IREF pin voltage also monitors
CC
Timeout
IREF
(
mA
Indication
5
Current
Charge
= 0V.
CHG
)
I
MIN
Voltage
Charge
CV
TIME
(EQ. 4)
V
REC
ISL9301
February 25, 2008
FN6435.0