ISL9301 データシートの表示（PDF） - Intersil

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ISL9301

High Input Voltage Charger With Power Path Management

Intersil 

Block Diagram

VIN

TIME

ILIM_REF

VOUT

VOUT_REF

Die Temp

142 oC

VCC

IMIN

ISL9301

1000

RILIM

1

IBAT

IOUT

1000

1

1V

COMP

0.2V

COMP

IBAT_REF

VBAT

VBAT_REF

Die Temp

115 oC

SHUTDOWN

SQ

SHUTDOWN

R

VIN

VBAT

IOUT

IBAT

CLK

POR

Timer

EOC

Re-charge

OVP

DispIay

Logic

PPM CTRL

GND

To system load

VOUT

VBAT

IREF

Cell1

VBAT

CHG

PPR

To uP

Pin Descriptions

VIN - Power input. The absolute maximum input voltage is

28V. A 10µF or larger value capacitor is recommended to be

placed very close to the input pin for decoupling purposes.

Additional capacitance may be required to provide a stable

input voltage.

VBAT - Charger output pin. Connect this pin to the battery. A

1µF or larger X5R ceramic capacitor is recommended for

decoupling and stability purposes. When the BATON pin is

pulled to logic LOW or left floating, the VBAT pin is

disconnected from the IC.

TIME - Timing resistor pin. The TIME pin determines the

oscillation period by connecting a timing resistor between

this pin and GND. The oscillator also provides a time

reference for the charger calculated in Equation 1.

tOSC = 75 × RTIME

(μs)

(EQ. 1)

Where RTIME is in MΩ. The nominal timeout interval is given

by Equation 2:

tTIMEOUT

=

2----2---8----×-----t--O-----S----C--

3600

(Hour)

(EQ. 2)

Where tOSC is in seconds. For an 1MΩ RTIME, the nominal

timeout interval is approximately 5.6 hours.

4

PPR - Open-drain power presence indication. The

open-drain MOSFET turns on when the input voltage is

above the POR threshold but below the OVP threshold and

off otherwise. This pin is capable to sink 10mA (minimum)

current to drive a LED. The maximum voltage rating for this

pin is 7V.

CHG - Open-drain charge indication pin. This pin outputs a

logic LOW when a charge cycle starts and turns to HIGH

when the end-of-charge (EOC) condition is qualified. This

pin is capable to sink 10mA min. current to drive an LED.

When the charger is disabled, the CHG outputs high

impedance.

IMIN - End-of-charge (EOC) current program pin. Connect a

resistor between this pin and the GND pin to set the EOC

current. The EOC current IMIN can be programmed by

Equation 3:

IMIN

=

--3----1---5---1----

RIMIN

(mA)

(EQ. 3)

Where RIMIN is in kΩ. The programmable range covers 5%

(or 10mA, whichever is higher) to 50% of IREF when

programmed to less than 5% or 10mA.

FN6435.0

February 25, 2008

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