ISL6294 Intersil, ISL6294 Datasheet - Page 3

• Manufacturer Part Number: ISL6294
• Description: High Input Voltage Charger
• Manufacturer: Intersil

Electrical Specifications
NOTES:
Pin Descriptions
VIN - Power input. The absolute maximum input voltage is
28V. A 0.47µF or larger value X5R ceramic capacitor is
recommended to be placed very close to the input pin for
decoupling purpose. Additional capacitance may be required
to provide a stable input voltage.
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 an LED. The maximum voltage rating for this
pin is 7V. This pin is independent on the EN-pin input.
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.
EN - Enable input. This is a logic input pin to disable or
enable the charger. Drive to HIGH to disable the charger.
When this pin is driven to LOW or left floating, the charger is
enabled. This pin has an internal 200kΩ pull-down resistor.
GND - System ground.
IMIN - End-of-charge (EOC) current program pin. Connect a
resistor between this pin and the GND pin to set the EOC
INTERNAL TEMPERATURE MONITORING
Charge Current Foldback Threshold
(Note 6)
LOGIC INPUT AND OUTPUTS
EN Pin Logic Input High
EN Pin Logic Input Low
EN Pin Internal Pull Down Resistance
CHG Sink Current when LOW
CHG Leakage Current When HIGH
PPR Sink Current when LOW
PPR Leakage Current When HIGH
3. The 4.0V V
4. For junction temperature below 100 °C.
5. The charge current can be affected by the thermal foldback function if the IC under the test setup cannot dissipate the heat.
6. This parameter is guaranteed by design, not tested.
than the POR threshold, no output pin can be used for indication.
PARAMETER
BAT
is selected so that the CHG output can be used as the indication for the offset comparator output indication. If the V
3
Typical Values Are Tested at VIN = 5V and the Ambient Temperature at 25°C. All Maximum and Minimum
Values Are Guaranteed Under the Recommended Operating Supply Voltage Range and Ambient Temperature
Range, Unless Otherwise Noted. (Continued)
SYMBOL
T
FOLD
Pin Voltage = 1V
V
Pin Voltage = 1V
V
CHG
PPR
6= 6.5V
= 6.5V
ISL6294
TEST CONDITIONS
current. The EOC current IMIN can be programmed by the
following equation:
Where R
(or 10mA, whichever is higher) to 50% of IREF. When
programmed to less than 5% or 10mA, the stability is not
guaranteed.
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 the following equation:
Where R
the actual charge current during the entire charge cycle,
including the trickle, constant-current, and constant-voltage
phases. When disabled, VIREF = 0V.
BAT - 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 EN pin is pulled
to logic HIGH, the BAT output is disabled.
EPAD - Exposed pad. Connect as much as possible copper
to this pad either on the component layer or other layers
through thermal vias to enhance the thermal performance.
I
I
REF
MIN
IMIN
IREF
=
=
11000
----------------
R
---------------- -
R
12089
is in kΩ. The programmable range covers 5%
is in kΩ. The IREF pin voltage also monitors
IMIN
IREF
MIN
100
100
1.3
10
10
-
-
-
(
(
mA
mA
TYP
115
200
20
20
-
-
-
-
)
)
MAX
130
400
0.5
1
1
-
-
-
February 18, 2005
BAT
UNITS
is lower
FN9174.0
mA
mA
kΩ
°C
µA
µA
V
V