USER’S MANUAL
ISL9301EVAL1Z
Evaluation Board Application\Manual
AN1338
Rev 1.00
March 31, 2008
Description
The ISL9301EVAL1Z is an evaluation tool for the ISL9301
single-cell Li-ion battery charger. The evaluation tool
provides a complete evaluation platform addressing all
datasheet specifications and functionality. The jumpers on
the board facilitate the programming of the charge current,
different charging conditions, and can be used to make other
necessary connections, such as current measurement.
The ISL9301 is a Li-ion battery charger with power path
management function. It uses separate power paths to
supply the system load and charge the battery. This feature
allows the system to immediately operate with a completely
discharged battery. This feature also allows the charge to
terminate when the battery is full while continuing to supply
the system with the input source, thus minimizes
unnecessary charge/discharge cycles and improves the
battery life.
The ISL9301 accepts input voltages ranging from 4.5V up to
28V. Due to the high voltage capability, the components
associated with the input circuit on the evaluation board are
good for a 28V supply.
The components assembled in the center square constitute
a complete charger, indicating the space saving advantage
of the typical ISL9301 installation in space-limited
applications.
What is Needed
The following instruments will be needed to perform testing:
• Power supplies:
- PS1: DC 30V/2A
- PS2: DC 0V to 5V, 1.5A
- DC Electronic load: 20V/2A
• Multimeters
• Oscilloscope
• Cables and wires
Quick Setup Guide
(Refer to Figure 1)
DO NOT APPLY POWER UNTIL STEP 6
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:
Connect a 5V supply PS1 to VIN (J6, upper +)
with the current limit set at 1A
Connect a 3.8V supply PS2 to BAT output (J2,
upper +) with the current limit set at 1A
Connect a current meter to JP5 as shown in
Figure 1
Connect the DC electronic load of 1.2A to BAT
(J2, upper +)
Insert a jumper shunt on JP6, all other jumper
shunts are not installed
Turn on Power Supplies and DC electronic load,
adjust the power supply PS2 such that the
voltmeter V2 reads 3.8V
Both the red and the green LEDs should be on,
indicating power on and charging condition
The current meter I2 should read about 70mA as
the charging current
Insert a jumper shunt on JP3 and the current
meter I2 should read about 150mA charging
current
Insert a jumper shunt on both JP2 and JP3, the
current meter I2 should read about 220mA
charging current
Reduce the voltage at PS2 to 2.4V for trickle
charge currents. The current reading should be
25mA
Slowly reduce the E-Load1 current until the
green LED turns off, the current meter I2 should
read about 15mA EOC current
Insert a jumper shunt on JP1 and repeat
Step 12, the current meter I2 should read 30mA
EOC current
DPPM test. Set the current limit on the input
supply to 1.5A. Increase E-Load2 output current
until VOUT drops to VDPPM level of 4.3V due to
input current limit of the ISL9301 and charging
current to the battery will reduce; to allow more
current to the output due to the DPPM function
Key Features
• Complete Charger for Single-Cell Li-ion/Polymer Batteries
• Power Path Management Optimize Charge and System
Currents
• Intelligent Timeout Interval Based On Actual Charge
Current
• Integrated Disconnect Switch to Disconnect the Battery
• 30mV (target) Voltage Accuracy
• Programmable Charge Current
• Programmable End-of-Charge Current
• Charge Current Thermal Foldback for Thermal Protection
• Trickle Charge for Fully Discharged Batteries
• 28V Maximum Voltage at VIN pin
• Power Presence and Charge Indications
• Ambient Temperature Range: -40°C to +85°C
• 3x3 10 Ld DFN Package
Step 7:
Step 8:
Step 9:
Step 10:
Step 11:
Step 12:
Step 13:
Step 14:
AN1338 Rev 1.00
March 31, 2008
Page 1 of 6
ISL9301EVAL1Z
I1
V1
V1
V2
V2
I2
I2
PS1
PS1
-
-
+
+
PS2
-
PS2
-
-
+
+
-
+
+
E-LOAD2
E-Load2
-
-
+
+
FIGURE 1. CONNECTION OF EQUIPMENT
E-Load1
E-LOAD1
output current measurement is needed as shown in
Figure 1.
JP8 - A shunt installed on JP8 connects BATON pin to VBAT
such that VOUT is connected to VBAT through an internal
MOSFET when VIN is not applied. When VIN is applied,
BATON pin has no impact on VOUT and VBAT.
TABLE 1. JUMPER SETTING SUMMARY
JUMPER
JP1
JP2
JP3
JP5
JP6
JP7
JP8
POSITION
Shunt installed
Shunt installed
Shunt installed
Shunt installed
Shunt installed
Shunt installed
Shunt installed
FUNCTION
Set EOC current to 30mA
Sets charging current to 0.15A, if
shunt on JP3 is not installed
Sets charging current to 0.15A, if
shunt on JP2 is not installed
Connects BAT to J2
Connects VIN to J1
Connects VOUT to J3
Connects VOUT to VBAT when
VIN is not applied.
Description of Jumper Settings
JP1 - Parallels an additional 274k resistor to the IMIN pin
(total RIMIN = 173k), such that the End-of-Charge Current
will be increased to 30mA (R
IMIN
is 274k and the EOC
current is 15mA without the shunt).
JP2 - Parallels an additional 53.4k resistor to the IREF pin
(total R
IREF
= 26.7k), such that the charge current will be
increased to 0.15A (R
IREF
is 53.4k and the charge current is
70mA if the shunt on JP3 is removed).
JP3 - Parallels an additional 53.4k resistor to the IREF pin
(total R
IREF
= 26.7k), such that the charge current will be
increased to 0.15A (R
IREF
is 53.4k and the charge current is
70mA if the shunts on both JP2 is removed). Shunts JP2 and
JP3 are installed, such that two additional 53.4k resistor to
IREF pin (total R
IREF
=17.8k), the charge current will be
increased to 0.24A.
JP5 - A shunt installed on JP5 connects the BAT pin to the
output connector J2 if IBAT measurement is not needed. The
shunt can be replaced by a current meter if charge current
measurement is needed as shown in Figure 1.
JP6 - A shunt installed on JP6 connects the VIN pin to the
output connector J1 if output current measurement is not
needed. The shunt can be replaced by a current meter if
input current measurement is needed as shown in Figure 1.
JP7 - A shunt installed on JP7 connects the VOUT pin to the
output connector J3 if input current measurement is not
needed. The shunt can be replaced by a current meter if
AN1338 Rev 1.00
March 31, 2008
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