an1338

ISL9301EVAL1Z Evaluation Board
Application Manual
®
Application Note
March 31, 2008
AN1338.1
Description
What is Needed
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 following instruments will be needed to perform testing:
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.
• 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:
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.
Step 6:
Key Features
Step 7:
• Complete Charger for Single-Cell Li-ion/Polymer Batteries
• Power Path Management Optimize Charge and System
Currents
Step 8:
Step 9:
• Intelligent Timeout Interval Based On Actual Charge
Current
Step 10:
• Integrated Disconnect Switch to Disconnect the Battery
• 30mV (target) Voltage Accuracy
Step 11:
• Programmable Charge Current
• Programmable End-of-Charge Current
• Charge Current Thermal Foldback for Thermal Protection
Step 12:
• Trickle Charge for Fully Discharged Batteries
• 28V Maximum Voltage at VIN pin
Step 13:
• Power Presence and Charge Indications
• Ambient Temperature Range: -40°C to +85°C
• 3x3 10 Ld DFN Package
1
Step 14:
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
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007, 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Application Note 1338
I1
V1
V1
V2
V2
I2
I2
PS1
PS1
-
+
-
+
PS2
--
PS2
-
+
+
E-LOAD2
E-Load2
-
++
--
+
+
E-Load1
E-LOAD1
FIGURE 1. CONNECTION OF EQUIPMENT
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 (RIMIN is 274k and the EOC
current is 15mA without the shunt).
JP2 - Parallels an additional 53.4k resistor to the IREF pin
(total RIREF = 26.7k), such that the charge current will be
increased to 0.15A (RIREF 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 RIREF = 26.7k), such that the charge current will be
increased to 0.15A (RIREF 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 RIREF =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.
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
POSITION
FUNCTION
JP1
Shunt installed
Set EOC current to 30mA
JP2
Shunt installed
Sets charging current to 0.15A, if
shunt on JP3 is not installed
JP3
Shunt installed
Sets charging current to 0.15A, if
shunt on JP2 is not installed
JP5
Shunt installed
Connects BAT to J2
JP6
Shunt installed
Connects VIN to J1
JP7
Shunt installed
Connects VOUT to J3
Shunt installed
Connects VOUT to VBAT when
VIN is not applied.
JP8
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
2
AN1338.1
March 31, 2008
Application Note 1338
Schematic
D2
D1
C3
TP2
VBAT
TP1
VIN
JP6
TP6
TP7
CHG
PPR
JP5
2
1
TP11
C2
1
2
U1
VIN
VOUT
VBAT BATON
PPR
IREF
CHG
IMIN
TIME
GND
1
2
J2
TP5
VOUT
C6
R1
1
2
2
1
J1
R2
C5
TIME
ISL9301
C1
R3
JP7
TP8
BATON
TP10
JP1 IMIN
2
R4 1
R6
R5
TP9
JP2
2
1
JP3 IREF
2
1
R7
R8
J3
C4
1
2
JP8
2
1
TP12
GND
TP3
GND
TP4
GND
FIGURE 2. ISL9301EVAL1Z SCHEMATIC
PCB Layout
FIGURE 3. SILK LAYER
3
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March 31, 2008
Application Note 1338
PCB Layout (Continued)
FIGURE 4. TOP LAYER
FIGURE 5. BOTTOM LAYER
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March 31, 2008
Application Note 1338
ISL9301EVAL1Z Bill Of Materials
ITEM
QTY
REFERENCE
PART DESCRIPTION
PCB
FOOTPRINT
1
1
U1
ISL9301 Power Pather Charger
3x3 DFN
2
2
R1, R2
0805, 470, 5% Resistor
3
1
R3
4
1
5
1
6
PART NUMBER
VENDOR
ISL9301
Intersil
0805
ERJ-6GEYJ471V
Panasonic
0402, 100k, 1% Resistor
0402
ERJ-2RKF1003X
Panasonic
R4
0402, 274k, 1% Resistor
0402
ERJ-2RKF2743X
Panasonic
R6
0402, 53.4k, 1% Resistor
0402
ERJ-2RKF5902X
Panasonic
1
R5
0805, 274k, 1% Resistor
0805
ERJ-6ENF2743V
Panasonic
7
2
R7, R8
0805, 53.4k, 1% Resistor
0805
ERJ-6ENF5902V
Panasonic
8
1
C1
Panasonic
9
3
C3, C5, C6
10
2
C2, C4
11
3
J1, J2, J3
12
3
VIN, VOUT, VBAT
13
6
TIME, CHG, PPR, IREF, IMIN, BATON
14
4
GND
15
5
JP2, JP3, JP5, JP6, JP7, JP8
4.7µF, 35V, Tantalum
2512
ECS-T1VC475R
0.01µF, 50V, X7R Ceramic
0402
C0402C103K5RACTU Kemet
10µF, 6.3V, Tantalum
1206
ECS-T0JY106R
Panasonic
2.54mm Center Header, 2ckt
22-11-2022
Molex
Test point, Red
5010
Keystone
Test point, Yellow
5014
Keystone
Test point, Black
5011
Keystone
2.54mm header, 2ckt
22-28-4020
Molex
16
1
D2
Green LED
0805
SML-LXT0805GW-TR
Lumex Opto
17
1
D1
Red LED
0805
SML-LXT0805IW-TR
Lumex Opto
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to
verify that the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
5
AN1338.1
March 31, 2008
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