5

FN9212.1

January 3, 2006

Functional Pin Description

CRDL (Pin 1)

Cradle input. This pin is usually connected to a cradle power

input. The maximum input voltage is 28V. The charge

current from this pin is programmable with the ICDL pin up to

1A. When this pin is connected to a power source, no charge

current is drawn from the USB pin. A 1µF or larger value

ceramic capacitor is recommended for decoupling.

USB (Pin 2)

USB input. This pin is usually connected to a USB port

power connector. Other sources that are lower than 5.5V are

also acceptable. The charge current from the USB pin is

fixed at typically 380mA. A 1µF or larger value ceramic

capacitor is recommended for decoupling. It is also

recommended to have a 1

Ω resistor in series with the

decoupling capacitor to prevent an over-shoot voltage when

a USB cable is plugged in.

PPR (Pin 3)

Power presence indication. An open-drain output pin which

turns ON when either the USB input voltage or the CRDL

input voltage is above its POR level, regardless if the

charger is enabled or disabled. Otherwise turns OFF. This

pin provides a wake-up signal to a microprocessor when

either the cradle or the USB power is connected.

CHG (Pin 4)

Charge indication pin. An open-drain output which turns ON

when the charge current from the cradle input is above

programmable IMIN or when the charge current from the

USB input is above the fixed end of charge current

threshold. Otherwise turns OFF.

EN (Pin 5)

Enable logic input. Connect to LOW or leave floating to

enable the charger.

IMIN (Pin 6)

IMIN is the programmable input for the end-of-charge

current. IMIN is calculated by the following equation:

charging. The USB EOC current has been fixed as shown on

the electrical specification table.

PRECONDITIONING CHARGE THRESHOLD

Preconditioning Charge Threshold Voltage

2.5

2.6

2.7

V

INTERNAL TEMPERATURE MONITORING

Current Foldback Threshold (Note 7)

85

100

115

°C

LOGIC INPUT AND OUTPUT

USBON Logic Input High

1.3

-

-

V

USBON Logic Input LOW

--

0.4

V

EN Pin Logic Input High

1.3

-

-

V

EN Pin Logic Input Low

--

0.4

V

EN Pin Internal Pull Down Resistance

350

600

850

k

Ω

USBON Pin internal Pull Down Resistance

700

1000

1300

k

Ω

CHG/PPR Sink Current

Pin Voltage = 0.8V

10

-

-

mA

NOTES:

than the POR threshold, no output pin can be used for indication.

4. The maximum and minimum limits are guaranteed over -40°C to 70°C ambient temperature range.

5. The charge current can be affected by the thermal foldback function if the IC under the test setup cannot dissipate the heat.

6. Constant current can be affected if the junction temperature exceeds 70 °C.

7. Guaranteed by characterization or correlation to other test.

Electrical Specifications

Typical Values Are Tested at USB = CRDL = 5V and ambient temperature is at 25°C, Unless Otherwise Noted. All

Maximum and Minimum Values Are Guaranteed Under the Recommended Operating Conditions. (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

14478

---------------- 4mA

()

–

=

ISL6299A