CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
1. The maximum voltage rating for the VB pin under continuous operating conditions is 5.5V. All other pins are allowed to operate continuously at
the absolute maximum ratings.
2.
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
3. For
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
PARAMETER
POWER-ON RESET
Rising VIN Threshold
POR Hysteresis
VIN Bias Current
VIN Bias Current
PROTECTIONS
Typical values are tested at V
IN
= 5.0V and T
A
= +25°C, maximum and minimum values are guaranteed over
the recommended operating conditions, unless otherwise noted.
SYMBOL
V
POR
I
VIN
When Enabled
When Disabled
V
OVP
TEST CONDITIONS
MIN
2.40
-
0.75
30
5.65
-
5.55
-
I
OCP
Bt
OCP
V
BOVP
V
VB
= 3V, R
ILIM
= 25k
0.93
-
4.280
-
4.225
Bt
BOVP
V
VB
= 4.4V
-
-
-
-
1.5
-
100
Sink 5mA current
-
-
r
DS(ON)
4.6V < V
IN
< 5.5V
-
TYP
2.58
0.10
0.90
60
5.85
0.06
-
-
1.00
170
4.340
0.030
-
180
-
140
90
-
-
200
0.35
-
170
MAX
2.70
-
1.10
100
6.00
0.10
-
1
1.07
-
4.400
-
-
-
20
-
-
-
0.4
400
0.80
1
280
UNITS
V
V
mA
µA
V
V
V
µs
A
µs
V
V
V
µs
nA
°C
°C
V
V
k
V
µA
m
Input Overvoltage Protection (OVP)
Input OVP Hysteresis
Input OVP Falling Threshold
Input OVP Propagation Delay
Overcurrent Protection
Overcurrent Protection Blanking Time
Battery Overvoltage Protection Threshold
Battery OVP Threshold Hysteresis
Battery OVP Falling Threshold
Battery OVP Blanking Time
VB Pin Leakage Current
Over-Temperature Protection Rising Threshold
Over-Temperature Protection Falling Threshold
LOGIC
EN Input Logic HIGH
EN Input Logic LOW
EN Internal Pull-Down Resistor
WRN Output Logic Low
WRN Output Logic High Leakage Current
POWER MOSFET
ON-Resistance
FN6489 Rev 1.00
January 16, 2009
Page 2 of 11
ISL9209C
ISL9209C
VB (Pin 8)
Battery voltage monitoring input. This pin is connected to the
battery pack positive terminal via an isolation resistor.
Pin Descriptions
VIN (Pin 1, 2)
The input power source. The VIN can withstand 30V input.
GND (Pin 3)
System ground reference.
ILIM (Pin 9)
Overcurrent protection threshold setting pin. Connect a
resistor between this pin and GND to set the OCP threshold.
WRN (Pin 4)
WRN is an open-drain logic output that turns LOW when any
protection event occurs.
OUT (Pin 10, 11)
Output pin.
NC (Pin 5, 6, 12)
No connection and must be left floating.
EPAD
The exposed pad at the bottom of the TDFN package for
enhancing thermal performance. Must be electrically
connected to the GND pin.
EN (Pin 7)
Enable input. Pull this pin to low or leave it floating to enable
the IC and force it to high to disable the IC.
Typical Applications
INPUT
VIN
OUT
ISL6292
BATTERY
CHARGER
C
1
PART
ISL9209C
ILIM
VB
EN
R
VB
BATTERY
PACK
DESCRIPTION
25k
200k to 1M
1µF/16V X5R ceramic capacitor
R
ILIM
R
VB
C
1
R
ILIM
GND
WRN
Block Diagram
INPUT
VIN
Q
1
Q
2
POR
PRE-REG
Pre-reg
REF
Ref
FET
DRIVER
Driver
OUT
ISL6292
Battery
BATTERY
CHARGER
Charger
Q
3
ILIM
R
ILIM
R
1
CP2
EA
CP1
R
2
1.2V
Q
4
0.8V
Logic
LOGIC
CP3
R
4
Q
5
R
5
EN
R
3
BUF
VB
R
VB
WRN
GND
FIGURE 1. BLOCK DIAGRAM
FN6489 Rev 1.00
January 16, 2009
Page 3 of 11
ISL9209C
ISL9209C
The test conditions for the Typical Operating Performance are: V
IN
= 5V, T
A
= +25°C,
R
ILIM
= 25.5k, R
VB
= 200k, Unless Otherwise Noted.
Typical Operating Performance
VIN
(1V/div)
VIN
(1V/DIV)
OUT
(1V/div)
OUT
(1V/DIV)
VIN (2V/DIV)
VIN (2V/div)
Load Current
LOAD CURRENT
200mA/DIV
(200mA/div)
TIME: 5ms/DIV
Time: 5ms/div
OUT (2V/DIV)
OUT (2V/div)
WRN (5V/DIV)
WRN (5V/div)
TIME: 5µs/DIV
Time: 5s/div
FIGURE 2. CAPTURED WAVEFORMS FOR POWER-UP. THE
OUTPUT IS LOADED WITH A 10 RESISTOR
FIGURE 3. CAPTURED WAVEFORMS WHEN THE INPUT
VOLTAGE STEPS FROM 5.5V TO 9.5V
Time: 500ms/div
TIME: 500ms/DIV
VIN
(2V/div)
VIN
(2V/DIV)
VIN (2V/div)
VIN (2V/DIV)
OUT
(2V/div)
OUT
(2V/DIV)
OUT
(2V/DIV)
OUT
(2V/div)
WRN
(5V/div)
WRN
(5V/DIV)
WRN
(5V/DIV)
WRN
(5V/div)
Time:
5ms/DIV
TIME:
5ms/div
FIGURE 4. CAPTURED WAVEFORMS WHEN THE INPUT
GRADUALLY RISES TO THE INPUT
OVERVOLTAGE THRESHOLD
FIGURE 5. TRANSIENT WHEN THE INPUT VOLTAGE STEPS
FROM 6.5V TO 5.5V
VIN (2V/div)
VIN (2V/DIV)
Time: 20s/div
TIME: 20s/DIV
VIN (1V/DIV)
VIN (1V/div)
VB (1V/div)
VB (1V/DIV)
OUT (2V/DIV)
OUT (2V/div)
ILIM (1V/DIV)
ILIM (1V/div)
WRN
(5V/div) Time: 500s/div
WRN
(5V/DIV) TIME: 500µs/DIV
OUT
(1V/div)
OUT
(1V/DIV)
WRN
(5V/DIV)
WRN
(5V/div)
FIGURE 6. TRANSIENT WAVEFORMS WHEN INPUT STEPS
FROM 0V TO 9V
FIGURE 7. BATTERY OVERVOLTAGE PROTECTION. THE IC
IS LATCHED OFF AFTER 16 COUNTS OF
PROTECTION. VB VOLTAGE VARIES BETWEEN
4.3V TO 4.5V
FN6489 Rev 1.00
January 16, 2009
Page 4 of 11
ISL9209C
ISL9209C
The test conditions for the Typical Operating Performance are: V
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